JP7790232B2 - Disaster prevention broadcast evaluation device and disaster prevention broadcast evaluation method - Google Patents

Description

The present invention relates to a disaster prevention broadcast evaluation device and a disaster prevention broadcast evaluation method.

For example, local governments have established disaster prevention broadcasting systems to inform residents of disaster prevention information. The disaster prevention broadcasting system comprises a disaster prevention broadcasting device installed in the local government office and multiple speakers installed in multiple locations throughout the local government area. When necessary, local government officials use the disaster prevention broadcasting device to broadcast disaster prevention information from the multiple speakers. An example of such a disaster prevention broadcasting system is described in the following patent document:

Japanese Patent Application Publication No. 5-30051 Japanese Patent Application Laid-Open No. 2008-252279

Disaster prevention broadcasting systems use disaster prevention broadcasting equipment to broadcast disaster prevention information from multiple speakers to inform residents of the information, so the location of the speakers is important. Therefore, it is necessary to confirm that the speakers are installed in appropriate locations. However, if a contractor is commissioned to conduct a speaker location survey, the number of speakers to be surveyed will be limited, making it difficult to conduct a thorough survey. In this case, local governments could consider conducting the survey themselves, but this requires specialized measuring equipment and technology, making it difficult to conduct a highly accurate survey. Furthermore, depending on the location of the speakers, contractors may have to enter residents' homes to conduct the survey, which could raise issues of resident consent and privacy. Furthermore, the technology in Patent Documents 1 and 2 does not allow for evaluation of the degree to which audio from disaster prevention broadcast speakers can be heard.

The present invention was made in consideration of the above, and aims to easily inspect the condition of speakers used for disaster prevention broadcasts over a wide area.

To solve the above-mentioned problems and achieve the objectives, the disaster prevention broadcast evaluation device of the present invention comprises a storage unit that stores reference audio data for disaster prevention broadcasts; a data acquisition unit that acquires location information of a mobile device and recorded audio data of the disaster prevention broadcast output from the speaker and recorded by the microphone of the mobile device; a comparison unit that compares the reference audio data with the recorded audio data and generates a score as a result of the comparison; and an evaluation unit that evaluates at least one of the installation status of the speaker for the disaster prevention broadcast and the sound quality of the disaster prevention broadcast by determining the distribution of the location information of the mobile device and the score.

The disaster prevention broadcast evaluation method of the present invention includes the steps of acquiring location information of a mobile device and recorded audio data of the disaster prevention broadcast output from a speaker and recorded by a microphone of the mobile device, comparing the recorded audio data with preset reference audio data and generating a score as a result of the comparison, and evaluating at least one of the installation status of the speaker for the disaster prevention broadcast and the sound quality of the disaster prevention broadcast by determining the distribution of the location information of the mobile device and the score.

The present invention has the advantage of making it easy to investigate the condition of speakers used for disaster prevention broadcasts over a wide area.

FIG. 1 is a block diagram showing a disaster prevention broadcasting system according to this embodiment. FIG. 2 is a flowchart showing a method for evaluating audio data in the disaster prevention broadcast evaluation device. FIG. 3 is a flowchart showing a method for evaluating time data in the disaster prevention broadcast evaluation device.

Embodiments of a disaster prevention broadcast evaluation device, a disaster prevention broadcast evaluation method, and a program according to the present invention will be described in detail below with reference to the accompanying drawings. Note that the present invention is not limited to the following embodiments.

<Disaster Prevention Broadcast System>
FIG. 1 is a block diagram showing a disaster prevention broadcasting system according to this embodiment.

As shown in FIG. 1, the disaster prevention broadcast system 10 is installed, for example, in a local government's disaster prevention department. The disaster prevention broadcast system 10 includes an operation device 11, a disaster prevention broadcast control device 12, a speaker 13, and a GPS receiver (not shown).

The operating device 11 is connected to the disaster prevention broadcast control device 12. The operating device 11 can be operated by local government employees and inputs various operation command signals to the disaster prevention broadcast control device 12. For example, an employee operates the operating device 11 to input a disaster prevention broadcast start signal or a disaster prevention broadcast stop signal to the disaster prevention broadcast control device 12.

A speaker 13 is connected to the disaster prevention broadcast control device 12. The disaster prevention broadcast control device 12 controls the speaker 13 based on various operation command signals input from the operation device 11. For example, the disaster prevention broadcast control device 12 outputs a disaster prevention broadcast from the speaker 13 based on a disaster prevention broadcast start signal input from the operation device 11. The disaster prevention broadcast control device 12 also stops the output of a disaster prevention broadcast from the speaker 13 based on a disaster prevention broadcast stop signal input from the operation device 11.

Speakers 13 are installed at multiple predetermined locations in an area managed by a local government. That is, multiple speakers 13 are installed at locations spaced a predetermined distance apart. Therefore, multiple speakers 13 are connected to the disaster prevention broadcast control device 12.

The disaster prevention broadcast system 10 also includes a disaster prevention broadcast evaluation device 21 and a display unit 22. As will be described later, the disaster prevention broadcast evaluation device 21 evaluates the position of the speaker 13 and evaluates the sound quality of the disaster prevention broadcast output from the speaker 13. The display unit 22 is connected to the disaster prevention broadcast evaluation device 21. The display unit 22 displays the evaluation results of the disaster prevention broadcast evaluation device 21.

The disaster prevention broadcast evaluation device 21 can be connected to a mobile terminal 100 wirelessly or via a network. The mobile terminal 100 is, for example, a smartphone or tablet PC.

<Mobile devices>
The mobile terminal 100 is carried and operated by a local resident. The mobile terminal 100 includes at least a microphone 101, a GPS receiving unit 102, a clock 103, a processing unit 104, and a communication unit 105.

When operated by a resident carrying the mobile terminal 100, the microphone 101 records audio data of the disaster prevention broadcast output from a nearby speaker 13 and acquires it as recorded audio data. At this time, the microphone 101 may also record the recorded audio data in a memory unit (not shown) as necessary.

The GPS receiver 102 is composed of a GPS receiver circuit, a GPS receiving antenna, etc., and receives GPS signals. The GPS receiver 102 acquires location information for the mobile terminal 100 based on the received GPS signals.

The clock 103 obtains and displays the current time.

When the processing unit 104 acquires recorded audio data by recording audio data of a disaster prevention broadcast output from the speaker 13 using the microphone 101, it acquires location information of the mobile terminal 100 from the GPS receiving unit 102 and time information from the clock 103. The processing unit 104 then associates the recorded audio data with the location information and time information of the mobile terminal 100.

The communication unit 105 can be connected to the disaster prevention broadcast evaluation device 21 of the disaster prevention broadcast system 10 wirelessly or via a network. The network is, for example, the Internet. The communication unit 105 can transmit the recorded audio data associated by the processing unit 104 and related information such as the location information and time information of the mobile terminal 100 to the disaster prevention broadcast evaluation device 21.

In addition to the microphone 101, GPS receiving unit 102, clock 103, processing unit 104, and communication unit 105, the mobile terminal 100 may also include, for example, a camera, a map information acquisition unit, and a weather information acquisition unit. The camera acquires images of surrounding information. The map information acquisition unit acquires surrounding map information via the communication unit 105. The weather information acquisition unit acquires weather information such as the surrounding weather, temperature, and wind direction. The processing unit 104 may associate surrounding image information, map information, and weather information in addition to the recorded audio data and the location information and time information of the mobile terminal 100, and the communication unit 105 may transmit this associated information to the disaster prevention broadcast evaluation device 21.

<Disaster prevention broadcast evaluation device>
The disaster prevention broadcast evaluation device 21 includes a communication unit (data acquisition unit) 31, a storage unit 32, a comparison unit 33, and an evaluation unit 34.

The communication unit 31 can be connected to the communication unit 105 of the mobile terminal 100 wirelessly or via a network. The network is, for example, the Internet. The communication unit 31 can receive and acquire recorded audio data transmitted from the communication unit 105 of the mobile terminal 100, as well as related information such as the location information and time information of the mobile terminal 100. Note that although the data acquisition unit is described as the communication unit 31, it is not limited to this configuration. The data acquisition unit may be a cable that can be connected to the mobile terminal 100 via a wired connection, or a recording medium such as an SD card or USB flash memory.

The memory unit 32 stores reference audio data for disaster prevention broadcasts. The reference audio data is the same as the audio data output from the speaker 13 by the disaster prevention broadcast control device 12. The memory unit 32 also stores the arrival time of the reference audio data for disaster prevention broadcasts. The arrival time is calculated based on the position information of the speaker 13 and the position information of the mobile terminal 100. The arrival time is the time from the output start time at which the disaster prevention broadcast is output from the speaker 13 to the arrival time at which the disaster prevention broadcast reaches the mobile terminal 100. In other words, when a disaster prevention broadcast start signal is input from the operation device 11, the disaster prevention broadcast control device 12 outputs the reference audio data to the multiple speakers 13, and the disaster prevention broadcast is broadcast from each speaker 13. The output start time is the time at which the speaker 13 outputs the reference audio data transmitted from the disaster prevention broadcast control device 12. The arrival time is the time at which the disaster prevention broadcast output from each speaker 13 reaches each mobile terminal 100. The arrival time is the time from the output start time to the arrival time.

The comparison unit 33 and evaluation unit 34 are a control device. The control device is realized, for example, by a CPU (Central Processing Unit) or MPU (Micro Processing Unit) executing a program stored in a storage unit (not shown) using RAM (Random Access Memory) or the like as a working area. The control device is also a controller, and may be realized, for example, by an integrated circuit such as an SOC (System on a Chip) or FPGA (Field Programmable Gate Array).

The comparison unit 33 has an audio data comparison unit 41, a time data comparison unit 42, and a sound quality data comparison unit 43. The audio data comparison unit 41 has a conversion unit 51 and an audio matching calculation unit 52. The time data comparison unit 42 has a time calculation unit 53 and a time matching calculation unit 54.

In the comparison unit 33, the audio data comparison unit 41 compares the reference audio data of the disaster prevention broadcast recorded in the memory unit 32 with the recorded audio data received by the communication unit 31, and determines the comparison result as a score. In this case, the conversion unit 51 first converts the recorded audio data received by the communication unit 31 into text. In other words, the conversion unit 51 converts the recorded audio that residents recognize aurally into recorded text that residents recognize visually. Meanwhile, the reference audio data of the disaster prevention broadcast recorded in the memory unit 32 has been converted into text in advance by the conversion unit 51 and stored in the memory unit 32.

Next, the voice matching calculation unit 52 compares the text sentences in the reference voice data with the text sentences in the recorded voice data to calculate the voice matching degree. This voice matching degree is the degree of matching between the text sentences in the reference voice data and the text sentences in the recorded voice data, and is expressed, for example, as a percentage or a 10-level scale. For example, if the text sentences in the reference voice data and the text sentences in the recorded voice data match perfectly, the degree of matching is 100%, or level 10. Furthermore, if the degree of matching between the text sentences in the reference voice data and the text sentences in the recorded voice data is 80%, the degree of matching is 80%, or level 8.

Note that the conversion unit 51 converts the recorded audio data into text sentences, and the audio matching calculation unit 52 calculates the audio matching degree by comparing the text sentences of the reference audio data with the text sentences of the recorded audio data, but this configuration is not limited to this. For example, the conversion unit 51 may convert the recorded audio data into an audio output waveform, and the audio matching calculation unit 52 may calculate the audio matching degree by comparing the reference audio output waveform with the recorded audio output waveform, or other methods may be used.

In the comparison unit 33, the time data comparison unit 42 compares the arrival time (output start time - arrival time) of the disaster prevention broadcast recorded in the memory unit 32 with the delay time (output start time - recording time) calculated from the time information received by the communication unit 31, and uses the comparison result as a score. In this case, the time calculation unit 53 first calculates the delay time from the output start time of the disaster prevention broadcast output from the speaker 13 to the recording time when the microphone 101 of the mobile terminal 100 recorded the audio data of the disaster prevention broadcast. Next, the time agreement calculation unit 54 compares the arrival time of the disaster prevention broadcast with the delay time to calculate the time agreement. This time agreement is the deviation time between the arrival time of the disaster prevention broadcast and the delay time.

In the comparison unit 33, the sound quality data comparison unit 43 compares the reference sound data of the disaster prevention broadcast recorded in the memory unit 32 with the recorded sound data received by the communication unit 31, and calculates a score for the comparison result. Here, the sound quality of the sound data refers to frequency (low or high tones), loudness, sharpness, fluctuation intensity, volume, etc. Similar to the sound data comparison unit 41 and the time data comparison unit 42, the sound quality data comparison unit 43 compares the sound quality of the reference sound data of the disaster prevention broadcast recorded in the memory unit 32 with the sound quality of the recorded sound data received by the communication unit 31, and calculates a score for the comparison result. In this case, the sound quality data comparison unit 43 compares the sound quality of the reference sound data of the disaster prevention broadcast with the sound quality of the recorded sound data, and calculates the degree of sound quality match. This degree of sound quality match is expressed, for example, as a percentage or a 10-point scale.

The evaluation unit 34 has an audio data evaluation unit 61, a time data evaluation unit 62, and a sound quality data evaluation unit 63. The evaluation unit 34 evaluates the installation location (installation status) of the emergency broadcast speaker 13 and the sound quality of the emergency broadcast based on the distribution of scores associated with the location information of the mobile terminal 100.

The audio data evaluation unit 61 evaluates the installation location (installation status) of the disaster prevention broadcast speaker 13 based on the distribution of audio coincidences associated with the location information of the mobile terminal 100, based on the audio coincidences calculated by the audio coincidence calculation unit 52 of the audio data comparison unit 41. That is, in the disaster prevention broadcast evaluation device 21, the communication unit 31 receives disaster prevention broadcast information from the mobile terminals 100 of many residents in the area. Many residents record disaster prevention broadcasts using the microphones 101 of their mobile terminals 100 at different locations in the area. Therefore, the audio data evaluation unit 61 plots the audio coincidences at different locations in the area on a map of the area. The audio data evaluation unit 61 then evaluates the installation location of the disaster prevention broadcast speaker 13 based on the distribution of audio coincidences at these multiple different locations.

In other words, in areas where the degree of voice matching is high, the speaker 13 is evaluated as being installed in the correct position. On the other hand, in areas where the degree of voice matching is low, the speaker 13 is evaluated as being installed in the incorrect position. In this case, it can be suggested that the speaker 13 installation position needs to be changed.

The time data evaluation unit 62 evaluates the installation location (installation status) of the disaster prevention broadcast speaker 13 based on the distribution of time coincidence associated with the location information of the mobile terminal 100, based on the time coincidence calculated by the time coincidence calculation unit 54 of the time data comparison unit 42. That is, the time data evaluation unit 62 displays the time coincidence at different locations in the area on a map of the area. The time data evaluation unit 62 then evaluates the installation location of the disaster prevention broadcast speaker 13 based on the distribution of time coincidence at these multiple different locations. That is, in areas with a high degree of time coincidence, the speaker 13 is evaluated as being installed in the correct location. On the other hand, in areas with a low degree of time coincidence, the speaker 13 is evaluated as being installed in the incorrect location. In this case, it can be suggested that the installation location of the speaker 13 needs to be changed.

The sound quality data evaluation unit 63 similarly evaluates the sound quality of the speaker 13 for emergency broadcasts based on the distribution of sound quality matches associated with the location information of the mobile terminal 100, based on the degree of sound quality match. That is, the sound quality data evaluation unit 63 plots the degree of sound quality matches at different locations in the area on a map of the area. The sound quality data evaluation unit 63 then evaluates the sound quality of the speaker 13 for emergency broadcasts based on the distribution of sound quality matches at these multiple different locations. That is, in areas where the degree of sound quality match is high, the sound quality of the speaker 13 is evaluated as being adjusted correctly. On the other hand, in areas where the degree of sound quality match is low, the sound quality of the speaker 13 is evaluated as being adjusted incorrectly. In this case, it can be suggested that the sound quality of the speaker 13 needs to be adjusted.

<Evaluation method for disaster prevention broadcasts>
FIG. 2 is a flowchart showing a method for evaluating audio data in the disaster prevention broadcast evaluation device, and FIG. 3 is a flowchart showing a method for evaluating time data in the disaster prevention broadcast evaluation device.

In the method for evaluating audio data of disaster prevention broadcasts, as shown in Figures 1 and 2, in step S11, a local government employee operates the operating device 11 to input a disaster prevention broadcast start signal to the disaster prevention broadcast control device 12. The disaster prevention broadcast control device 12 then outputs the disaster prevention broadcast from multiple speakers 13 installed in the area. In step S12, a resident uses the microphone 101 of the mobile terminal 100 to record the disaster prevention broadcast being broadcast from the speaker 13. In step S13, the resident operates the mobile terminal 100, and the processing unit 104 transmits the audio data of the recorded disaster prevention broadcast (recorded audio data) and location information of the location where the disaster prevention broadcast was recorded to the local government's disaster prevention broadcast evaluation device 21.

In step S14, the local government's disaster prevention broadcast evaluation device 21 determines whether the communication unit 31 has received the recorded audio data of the disaster prevention broadcast and location information from the resident's mobile terminal 100. Here, if the disaster prevention broadcast evaluation device 21 determines (No) that the communication unit 31 has not received the recorded audio data of the disaster prevention broadcast and location information from the resident's mobile terminal 100, it waits in this state. On the other hand, if the disaster prevention broadcast evaluation device 21 determines (Yes) that the communication unit 31 has received the recorded audio data of the disaster prevention broadcast and location information from the resident's mobile terminal 100, it proceeds to step S15.

In step S15, in the disaster prevention broadcast evaluation device 21, the audio data comparison unit 41 converts the recorded audio data received by the conversion unit 51 into text. In step S16, the audio data comparison unit 41 calculates the audio coincidence by having the audio coincidence calculation unit 52 compare the text sentence of the reference audio data with the text sentence of the recorded audio data. Then, in step S17, the audio data evaluation unit 61 evaluates the installation location of the disaster prevention broadcast speaker 13 based on the audio coincidence distribution associated with the location information of the mobile terminal 100, based on the audio coincidence calculated by the audio coincidence calculation unit 52. In other words, the audio data evaluation unit 61 displays the audio coincidence at different locations in the area on a map of the area.

Then, in step S18, the voice data evaluation unit 61 outputs the evaluation results to the display unit 22. The display unit 22 displays the voice match scores at multiple different locations on a map of the area. This allows local government officials to evaluate the installation locations of the emergency broadcast speakers 13 by looking at the distribution of voice match scores displayed on the display unit 22. For example, voice match scores are expressed as levels 1 to 10, and the installation locations of speakers 13 expressed as voice match levels 1 to 3 need to be reviewed.

In the method for evaluating time data of disaster prevention broadcasts, as shown in Figures 1 and 3, in step S21, a local government employee operates the operating device 11 to input a disaster prevention broadcast start signal to the disaster prevention broadcast control device 12. The disaster prevention broadcast control device 12 then outputs the disaster prevention broadcast from multiple speakers 13 installed in the area. In step S22, a resident uses the microphone 101 of the mobile terminal 100 to record the disaster prevention broadcast being broadcast from the speaker 13. In step S23, the resident operates the mobile terminal 100, and the processing unit 104 transmits location information of the location where the disaster prevention broadcast was recorded and time information of the time the disaster prevention broadcast was recorded to the local government's disaster prevention broadcast evaluation device 21.

In step S24, the local government's disaster prevention broadcast evaluation device 21 determines whether the communication unit 31 has received the location information and time information of the disaster prevention broadcast from the resident's mobile terminal 100. Here, if the disaster prevention broadcast evaluation device 21 determines (No) that the communication unit 31 has not received the location information and time information of the disaster prevention broadcast from the resident's mobile terminal 100, it waits in this state. On the other hand, if the disaster prevention broadcast evaluation device 21 determines (Yes) that the communication unit 31 has received the location information and time information of the disaster prevention broadcast from the resident's mobile terminal 100, it proceeds to step S25.

In step S25, in the disaster prevention broadcast evaluation device 21, the time calculation unit 53 of the time data comparison unit 42 calculates the delay time from the start time of the disaster prevention broadcast output to the recording time when the microphone 101 of the mobile terminal 100 recorded the disaster prevention broadcast audio data. In step S26, the time agreement calculation unit 54 compares the arrival time of the disaster prevention broadcast with the delay time to calculate the time agreement. Then, in step S27, the time data evaluation unit 62 evaluates the installation location of the disaster prevention broadcast speaker 13 by the distribution of time agreement associated with the location information of the mobile terminal 100 based on the time agreement calculated by the time agreement calculation unit 54. In other words, the time data evaluation unit 62 displays the time agreement at different locations in the region on a map of the region.

Then, in step S28, the time data evaluation unit 62 outputs the evaluation result to the display unit 22. The display unit 22 displays the time coincidence at multiple different locations on a map of the area. This allows local government officials to evaluate the installation locations of the disaster prevention broadcast speakers 13 by looking at the distribution of time coincidence displayed on the display unit 22. For example, the time coincidence is expressed as levels 1 to 10, and the installation locations of speakers 13 expressed as time coincidence levels 1 to 3 need to be reviewed.

In the above explanation, the method for evaluating audio data and the method for evaluating time data are explained using separate flowcharts, but they may be performed simultaneously. Also, the method for evaluating sound quality of audio data for disaster prevention broadcasts is almost the same process as the method for evaluating audio data and the method for evaluating time data, and may be performed separately or simultaneously.
The process is almost the same.

[Effects of this embodiment]
The disaster prevention broadcast evaluation device of this embodiment includes a memory unit 32 that stores reference audio data for disaster prevention broadcasts, a communication unit (data acquisition unit) 31 that acquires location information of the mobile terminal 100 and recorded audio data for disaster prevention broadcasts output from the speaker 13 and recorded by the microphone 101 of the mobile terminal, a comparison unit 33 that compares the reference audio data with the recorded audio data and converts the comparison result into a score, and an evaluation unit 34 that evaluates at least one of the installation location (installation status) of the speaker for disaster prevention broadcasts and the sound quality of the disaster prevention broadcasts by calculating the distribution of the location information and score of the mobile terminal 100.

For this reason, audio data from disaster prevention broadcasts is acquired using mobile devices 100 carried by local residents, and the local government acquires and compares this audio data, determining the distribution of the mobile device 100's location information and score to evaluate the condition of the speakers used for disaster prevention broadcasts. As a result, there is no need to outsource the investigation of the speaker 13's condition to a contractor, and there are no issues with resident consent or privacy, making it easy to investigate the condition of speakers used for disaster prevention broadcasts over a wide area.

In the disaster prevention broadcast evaluation device of this embodiment, the comparison unit 33 has a voice matching calculation unit 52 that compares reference voice data with recorded voice data to calculate the voice matching degree, and the evaluation unit 34 evaluates the installation position of the speaker 13 for disaster prevention broadcasts by determining the distribution between the location information of the mobile terminal 100 and the voice matching degree calculated by the voice matching calculation unit 52. This makes it easy to evaluate the recorded voice data of disaster prevention broadcasts.

In the disaster prevention broadcast evaluation device of this embodiment, the comparison unit 33 has a conversion unit 51 that converts recorded audio data into text sentences, and the audio coincidence calculation unit 52 calculates the audio coincidence by comparing the text sentences of the reference audio data with the text sentences of the recorded audio data. This makes it possible to evaluate the recorded audio data of disaster prevention broadcasts with high accuracy.

In the disaster prevention broadcast evaluation device of this embodiment, the memory unit 32 stores the arrival time from the output start time of the disaster prevention broadcast from the speaker 13 to the arrival time of the disaster prevention broadcast at the mobile terminal 100, which is calculated based on the location information of the speaker 13 and the location information of the mobile terminal 100. The communication unit 31 acquires time information on the recording time when the recorded audio data of the disaster prevention broadcast was recorded by the microphone 101 of the mobile terminal 100. The comparison unit 33 has a time calculation unit 53 that calculates the delay time from the output start time to the recording time and a time agreement calculation unit 54 that compares the arrival time with the delay time to calculate the time agreement. The evaluation unit 34 evaluates the installation location of the speaker 13 for the disaster prevention broadcast by calculating the distribution of the location information of the mobile terminal 100 and the time agreement calculated by the time agreement calculation unit 54. This makes it possible to easily investigate the delay state of the disaster prevention broadcast audio data with high accuracy.

In the disaster prevention broadcast evaluation device of this embodiment, the comparison unit 33 compares the sound quality of the reference audio data with the sound quality of the recorded audio data to calculate the degree of sound quality agreement, and the evaluation unit 34 evaluates the sound quality of the disaster prevention broadcast output from the disaster prevention broadcast by determining the distribution between the location information of the mobile terminal 100 and the degree of sound quality agreement calculated by the comparison unit 33. This makes it easy to evaluate the recorded audio data of disaster prevention broadcasts.

So far, we have described the disaster prevention broadcast evaluation device according to the present invention, but it may be implemented in a variety of different forms other than the above-described embodiment.

The components of the disaster prevention broadcast evaluation device shown in the figure are functional concepts and do not necessarily have to be physically configured as shown. In other words, the specific form of each device is not limited to that shown, and all or part of them may be functionally or physically distributed or integrated in any unit depending on the processing load and usage status of each device.

The configuration of the disaster prevention broadcast evaluation device is realized, for example, as software, such as a program loaded into memory. In the above embodiment, it was described as a functional block realized by the cooperation of these hardware and software. In other words, these functional blocks can be realized in various ways, using only hardware, only software, or a combination of both.

The above-mentioned components include those that would be readily apparent to a person skilled in the art and those that are substantially identical. Furthermore, the above-mentioned configurations can be combined as appropriate. Furthermore, various omissions, substitutions, or modifications to the configuration are possible without departing from the spirit of the present invention.

This disclosure includes matters that contribute to the realization of the Sustainable Development Goals (SDGs) "Build resilient infrastructure, promote inclusive and sustainable industrialization, and foster innovation" and contribute to value creation through IoT solutions.

10 Disaster prevention broadcast system 11 Operation device 12 Disaster prevention broadcast control device 13 Speaker 21 Disaster prevention broadcast evaluation device 22 Display unit 31 Communication unit (data acquisition unit)
32 Storage unit 33 Comparison unit 34 Evaluation unit 41 Audio data comparison unit 42 Time data comparison unit 43 Sound quality data comparison unit 51 Conversion unit 52 Audio coincidence calculation unit 53 Time calculation unit 54 Time coincidence calculation unit 61 Audio data evaluation unit 62 Time data evaluation unit 63 Sound quality data evaluation unit 100 Mobile terminal 101 Microphone 102 GPS reception unit 103 Clock 104 Processing unit 105 Communication unit

Claims (6)

a storage unit for storing reference audio data for disaster prevention broadcasts;
a data acquisition unit that acquires location information of the mobile terminal and recorded audio data of the disaster prevention broadcast output from a speaker and recorded by a microphone of the mobile terminal;
a comparison unit that compares the reference voice data with the recorded voice data and sets the comparison result as a score;
an evaluation unit that evaluates at least one of the installation status of the speaker for the disaster prevention broadcast and the sound quality of the disaster prevention broadcast by obtaining a distribution of the position information of the mobile terminal and the score;
A disaster prevention broadcast evaluation device comprising: the comparison unit has a voice matching degree calculation unit that compares the reference voice data with the recorded voice data to calculate a voice matching degree, and the evaluation unit evaluates the installation status of the speakers for the disaster prevention broadcast by obtaining a distribution between location information of the mobile terminal and the voice matching degree calculated by the voice matching degree calculation unit.
The disaster prevention broadcast evaluation device according to claim 1 . the comparison unit has a conversion unit that converts the recorded voice data into text sentences, and the voice matching calculation unit calculates the voice matching degree by comparing the text sentences of the reference voice data with the text sentences of the recorded voice data.
The disaster prevention broadcast evaluation device according to claim 2 . The storage unit stores an arrival time from an output start time of the disaster prevention broadcast from the speaker to an arrival time of the disaster prevention broadcast at the mobile terminal, the arrival time being calculated based on position information of the speaker and position information of the mobile terminal,
The data acquisition unit acquires time information of a recording time when the recorded audio data of the disaster prevention broadcast is recorded by a microphone of the mobile terminal,
the comparison unit includes a time calculation unit that calculates a delay time from the output start time to the recording time, and a time coincidence calculation unit that compares the arrival time with the delay time to calculate a time coincidence degree,
the evaluation unit evaluates the installation status of the speakers for the disaster prevention broadcast by obtaining a distribution of the position information of the mobile terminal and the time coincidence calculated by the time coincidence calculation unit.
The disaster prevention broadcast evaluation device according to any one of claims 1 to 3. The comparison unit compares the sound quality of the reference sound data with the sound quality of the recorded sound data to calculate a degree of sound quality agreement, and the evaluation unit evaluates the sound quality of the disaster prevention broadcast output from the disaster prevention broadcast by determining a distribution between the location information of the mobile terminal and the degree of sound quality agreement calculated by the comparison unit.
The disaster prevention broadcast evaluation device according to any one of claims 1 to 4. A disaster prevention broadcast evaluation method executed by a computer of a disaster prevention broadcast evaluation device,
acquiring location information of the mobile terminal and recorded audio data of the disaster prevention broadcast output from a speaker and recorded by a microphone of the mobile terminal;
a step of comparing the recorded voice data with preset reference voice data and setting the comparison result as a score;
A step of evaluating at least one of the installation status of the speaker for the disaster prevention broadcast and the sound quality of the disaster prevention broadcast by obtaining a distribution of the position information of the mobile terminal and the score;
A disaster prevention broadcast evaluation method including: