JPH07212888A - Proximity microphone - Google Patents

Abstract

PURPOSE:To provide a proximity microphone improving tone quality by reducing air noise. CONSTITUTION:An omnidirectional microphone unit 12 is inserted in a rubber holder 13, the unit 12 is mounted on the upper case 16 and the lower case 17 provided with side surface sound holes 16a and 17a, an acoustic filter 14 is inserted on them and next and the front surf ace cover 11 provided with a sound hole 11a is convered. Because the stream of sound transmitting through the sound hole 11a of the front surface cover 11 is released from the side surface to the outside through the side surface holes 16a and 17a, the turbulence at the front surface of the microphone unit 12 is prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a close-talking type omnidirectional microphone.

[0002]

2. Description of the Related Art FIG. 2 shows the structure of a conventional close-talking microphone. In FIG. 2, reference numeral 1 is a front cover having a sound hole 1 a on the front surface, 2 is an omnidirectional microphone unit, which is press-fitted into a rubber holder 3 and attached to the front cover 1. Reference numeral 4 is an acoustic filter, which is compressed and inserted into a front air chamber 5 which is a space in front of the microphone unit 2. The front cover 1 is an upper case 6
And is sandwiched and fixed by the lower case 7.

In the above conventional example, the sound transmitted from the sound hole 1a of the front cover 1 can be transmitted to the microphone unit 2 through the front air chamber 5.

[0004]

However, in the above-mentioned conventional close-talking type microphone, the sound hole 1a of the front cover 1 is provided.
The air flow of the sound that has flowed into the front air chamber 5 through the air is accumulated in the space of the front air chamber 5 because there is no gap to escape, causing turbulence, and degrading the sound quality of the microphone unit 2.
There was a problem of increasing blowing noise.

The present invention solves such a conventional problem, and an object of the present invention is to provide a close-talking type microphone in which blowing noise is reduced and sound quality is excellent.

[0006]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention is designed to allow air flowing from a front sound hole to escape to the outside from another sound hole provided in the front air chamber. .

[0007]

Therefore, according to the present invention, it is possible to prevent the air flowing into the front air chamber in front of the microphone unit from causing turbulence, improve the sound quality of the sound transmitted to the microphone unit, and reduce the blowing noise. You can

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows the configuration of an embodiment of the present invention. In FIG. 1, 11 is a cover having a sound hole 11a on the front surface, 12 is an omnidirectional microphone unit, which is press-fitted into a rubber holder 13 and sandwiched between an upper case 16 and a lower case 17 to be mounted. . Reference numeral 15 is a front air chamber provided between the front cover 11 and the rubber holder 13, and the acoustic filter 14 is compressed and inserted therein. Reference numerals 16a and 17a denote groove-like side surface sound holes provided from the front surface portion to the side surface portion of the upper case 16 and the lower case 17. The front air chamber 15 and the side sound hole 16
“A” and “17a” are completed when the front cover 11 is fitted and fixed in the upper case 16 and the lower case 17.

According to the above-described embodiment, the sound air flowing from the sound hole 11a of the front cover 11 has a front air chamber 15
Since it can pass through the side surface sound holes 16a and 17a to pass through the microphone unit 12, it is possible to prevent turbulent airflow from being generated in the space in the front air chamber 15 and reduce blowing noise. .

[0010]

As is apparent from the above embodiment, the present invention can prevent the disturbance of the sound on the front surface of the omnidirectional microphone unit, improve the sound quality of the sound transmitted to the microphone unit, and reduce the blowing noise. It has the effect of being able to.

[Brief description of drawings]

FIG. 1 is a sectional view of a main part of a close-talking microphone according to an embodiment of the present invention.

FIG. 2 is a sectional view of a main part of a close-talking type microphone in a conventional example.

[Explanation of symbols]

 11 Front Cover 11a Sound Hole 12 Omnidirectional Microphone Unit 13 Rubber Holder 14 Acoustic Filter 15 Front Air Chamber 16 Upper Case 16a Side Sound Hole 17 Lower Case 17a Side Sound Hole

Claims (1)

[Claims] 1. A close-talking type microphone provided with another sound hole for letting out air, which has flowed through a sound hole on the front surface, into the front air chamber of the omnidirectional microphone unit.