JP3237380B2 - Speaker device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a speaker device used in various kinds of audio equipment, in which a microphone for detecting a sound signal of a speaker is attached, and the detected signal is fed back for control processing to correct sound quality deterioration. The present invention relates to a speaker device configured to perform

[0002]

2. Description of the Related Art A conventional speaker device will be described with reference to the drawings.

FIG . 5 is a block diagram showing an example of a conventional loudspeaker device. An audio signal inputted from an input terminal 40 is controlled by a filter 41 and then supplied to a power amplifier 42.
In the power amplifier, configured as output from the speaker 43
Had been formed.

[0004]

However, in the above-described conventional configuration, sound quality degradation due to external factors such as the influence of restrictions such as the mounting state of the speaker 43 appears on the acoustic characteristics and the performance of the speaker 43 varies. It was a problem.

Further, even if the above-mentioned external factors are controlled by the filter 41, the improvement is limited to only a limited frequency band, and the sound quality deterioration cannot be completely corrected.

The present invention solves the above-mentioned conventional problems. A microphone for detecting an audio signal reproduced from a speaker is attached to the speaker or in the vicinity of the speaker.
An object of the present invention is to provide an excellent speaker device capable of correcting audio deterioration by feeding back the detection signal and performing control processing.

[0007]

In order to solve this problem, a speaker device according to the present invention comprises a magnetic circuit having a magnetic gap formed by providing a vertically penetrating hole at the center and a magnetic circuit formed on the upper surface of the magnetic circuit. A frame, a diaphragm connected to the center of a voice coil that fits into the magnetic gap, and an outer peripheral portion coupled to the peripheral edge of the frame, and a microphone for detecting an audio signal attached to an upper end, and provided in the magnetic circuit. It consists of a microphone holder fitted in a hole, and the microphone holder has high thermal conductivity.
It is formed of a material.

[0008]

With this configuration, an audio signal detection microphone for detecting and feeding back the reproduced signal of the speaker can be attached with a simple configuration and efficiently, and an excellent microphone corrected via the audio signal detection microphone. It is possible to obtain a reproduced sound with improved sound quality.

[0009]

(Embodiment 1) Hereinafter, a first embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a sectional view showing the configuration of a speaker device according to the embodiment. In FIG. 1, reference numeral 1 denotes a microphone for detecting an audio signal for detecting and returning a reproduced signal from a speaker, and 2. Is a microphone holder for attaching the microphone 1, 3 is a lower plate having a center pole, 4 is a ring-shaped magnet,
5 is a ring-shaped upper plate, 6 is a voice coil, 7 is a suspension, 8 is a frame, 9 is an edge, 10 is a diaphragm, and 11 is a dust cap.

FIGS. 2A and 2B are a plan view and a front sectional view showing the structure of the microphone holder 2, respectively.
3A and 3B, the microphone holder 2 has a convex shape in which the bottom plate and the cylinder are integrated, and the microphone 1 can be fixed to the top of the cylinder.
Of the lower plate 3 can be fixed to a hole passing through the center of the center pole portion of the lower plate 3.

The microphone holder 2 is attached to the microphone 1 by attaching the microphone 1 to the microphone holder 2 and then inserting the integrated microphone 1 and microphone holder 2 into the lower plate 3 from the lower surface and joining them together. The part is fixed with an adhesive 50 and attached.

In the loudspeaker apparatus of the present invention configured as described above, the audio signal reproduced from the speaker 43 is detected by the microphone 1 as shown in FIG. 3, and the detected audio signal is fed back to the input terminal 40. After being controlled by the filter 41, the power is amplified by the power amplifier 42,
3 is output.

FIG. 4 is a characteristic diagram of the microphone output frequency characteristics measured by the speaker device of the present invention output as described above. The audio signal is detected from a low frequency range to a piston motion limit value, and a high frequency is attenuated. Characteristics.

As described above, according to the present embodiment, the speaker device improves the effect of the speaker mounting restriction, which is a problem in the conventional speaker device, and the acoustic characteristics of the speaker including the speaker variation and the surroundings. It becomes possible.

Further, by forming the material of the microphone holder 2 for mounting the microphone 1 for detecting the audio signal from a material having a high thermal conductivity such as aluminum or the like, a temperature rise occurs as the speaker device is driven. Also, a change in the characteristics of the speaker device can be suppressed by the microphone holder 2 having a large heat radiation effect.

[0017]

As described above, in the speaker device according to the present invention, a microphone for detecting an audio signal is attached to the speaker or near the speaker, and an audio signal equivalent to the audio signal output from the speaker is detected by the microphone. By adopting a configuration in which the detected signal is fed back and subjected to the control processing, it is possible to improve the deterioration of the acoustic characteristics due to the mounting state of the speaker, the variation in the performance of the speaker, and the like.

Further, the microphone for detecting the audio signal is used.
The material of the microphone holder for attaching the microphone
By using a material with high thermal conductivity such as
Even if the temperature rises with the driving of the speaker device,
A speaker device with a microphone holder that has a large heat dissipation effect
Characteristic change can be suppressed.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a configuration of a speaker device according to a first embodiment of the present invention.

FIG. 2A is a plan view showing a microphone holder according to the embodiment; FIG.

FIG. 3 is a block diagram showing the configuration of the speaker device according to the embodiment;

FIG. 4 is a microphone output frequency characteristic diagram of the speaker device according to the embodiment.

FIG. 5 is a block diagram showing a configuration of a conventional speaker device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Microphone 2 Microphone holder 3 Lower plate 4 Magnet 5 Upper plate 6 Voice coil 7 Suspension 8 Frame 9 Edge 10 Diaphragm 11 Dust cap 40 Input terminal 41 Filter 42 Power amplifier 43 Speaker 50 Adhesive

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-63-92200 (JP, A) JP-A-59-90496 (JP, A) JP-A-5-64280 (JP, A) 3898 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) H04R 9/02 102 H04R 1/02 108 H04R 3/04

Claims (1)

(57) [Claims] 1. A magnetic circuit having a magnetic gap formed by providing a vertically penetrating hole in a central portion, a frame connected to an upper surface of the magnetic circuit, and a voice coil fitted into the magnetic gap. An outer peripheral portion comprising a diaphragm coupled to a peripheral edge of the frame; and a microphone holder fitted with a microphone for detecting an audio signal at an upper end thereof and fitted in a hole provided in the magnetic circuit, the microphone holder comprising:
A speaker device in which the heater is formed of a material having high thermal conductivity .