JPH0414357B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION FIELD OF INDUSTRIAL APPLICATION The present invention relates to a sound generating device suitable for determining, for example, blowing or popping sounds from a microphone.

Configuration of conventional example and its problems Generally, in order to determine the presence or absence of a blowing sound or popping sound in a microphone, a person generates a blowing sound or a popping sound and performs the evaluation. This method has a problem in that it is difficult to quantitatively evaluate blowing and popping sounds because it relies heavily on human sensation. Therefore, as shown in Fig. 1, the low frequency signal from the low frequency oscillator 1 is amplified by the amplifier 2, and the speaker 3 is driven and the outlet 3a of the speaker 3 is narrowed to create a low frequency wind. As shown in FIG. 2, wind from an electric fan 4 is passed through a hollow pipe 5 to generate a blowing sound. However, the above-mentioned sound generators are far from the blowing sounds produced by humans, and it is difficult to produce the popping sounds produced by humans, so it is difficult to judge whether they are microphone blowing sounds or popping sounds. The drawback was that it itself became vague.

OBJECTS OF THE INVENTION An object of the present invention is to provide a sound generating device that can stably generate sounds that are as close to human speech as possible with good reproducibility.

Structure of the Invention The sound generating device of the present invention is configured to reduce the pressure of airflow from a pressure cylinder with a pressure reducing regulator and release it from the mouth of a dummy head through an acoustic element, and a pressure sensor between the acoustic element and the dummy head. It is equipped with a shutter that responds to the situation.
According to this configuration, the airflow from the pressure cylinder can be adjusted using the pressure reduction regulator to be equal to the blowing sound pressure generated by a human, and the airflow flowing to the dummy head can be adjusted using the shutter. Therefore, it has the advantage of being able to stably generate sounds that are similar to human sounds such as blowing sounds and pop sounds with good reproducibility.

Description of Examples Examples of the present invention will be described below. Third
The figure shows one embodiment of the present invention, and in FIG. 3, air pressure from a pressure cylinder 11 is adjusted by a pressure reducing regulator 12, and is led to a shutter 14 through a thin tube as an acoustic element 13. The passed airflow is released from the mouth of the dummy head 16. Here, the air pressure from the pressure cylinder 11 is regulated in the range of 0.5 to 3.0 kg/cm ² by the pressure reducing regulator 12, and is released from the mouth of the dummy head 16 through the acoustic element 13 and the shutter 14 as a constant air flow. This allows constant flow sound, that is, wind sound, to be generated. On the other hand, the shutter 14 is opened and closed at predetermined pressure intervals in response to the pressure sensor 15, thereby converting a constant flow into a pop sound. In other words, the pressure sensor 15
If the set pressure of is relatively high,
When the air pressure inside the acoustic element 13 is increased above this pressure, the shutter 14 opens, and the air inside the acoustic element 13 is released from the mouth of the dummy head 16 through the shutter 14, producing a pop sound.

In the above embodiment, a constant flow sound is generated when the shutter 14 is installed with a certain opening, and a popping sound is generated when the shutter 14 is opened and closed in response to the pressure sensor 15. However, if the pressure sensor 15 has two other elements that respond to a relatively high set pressure and a relatively low set pressure, the pressure sensor 15 can open and close the shutter 14 within the set pressure range. The dummy head 16 can be controlled to
This is advantageous in quantifying the airflow to the airflow, and it is possible to stably generate constant flow sound and blowing sound.

Effects of the Invention As described in detail above, according to the present invention, the airflow from the pressure cylinder is reduced in pressure by the pressure reducing regulator and discharged from the mouth of the dummy head through the acoustic element, and the airflow is disposed between the acoustic element and the dummy head. Since the shutter is equipped with a shutter that responds to the pressure sensor, it has the advantage of being able to generate sounds similar to human voices such as blowing sounds and popping sounds, and it also has the advantage of being able to properly cancel the microphone blowing sounds and popping sounds. It has the advantage of being able to be judged and evaluated.

[Brief explanation of drawings]

1 and 2 are block diagrams of a conventional sound generating device, and FIG. 3 is a block diagram showing an embodiment of the sound generating device of the present invention. 11...Pressure cylinder, 12...Reducing pressure regulator, 1
3...Acoustic element, 14...Shutter, 15...Pressure sensor, 16...Dummy head.

Claims (1)

[Claims] 1 Reduce the pressure of the airflow from the pressure cylinder by pressure reduction adjustment,
A sound generating device configured to emit sound from a dummy head opening through an acoustic element, and further comprising a shutter that is opened and closed in response to a pressure sensor between the acoustic element and the dummy head.