JP6519053B2 - Microphone, pop filter for microphone - Google Patents

Description

  The present invention relates to a microphone and a pop filter for the microphone.

  The pop noise generated by the microphone is generated by a sudden air flow change in the vicinity of the directional axis of the microphone (in the direction of the main axis) when the microphone picks up a burst sound or the like.

  Conventionally, as shown in FIG. 6, a pop filter 300 having elasticity and being stretched by a frame is provided between the microphone 100 and the speaker 200 to change the flow of air flow from the front of the directional axis. To reduce pop noise.

  In addition, in the wind screen put on the tip of the microphone, there is disclosed a technology in which a toroidal notch is provided at the tip to reduce pop noise (see, for example, Patent Document 1).

Japanese Utility Model Application Publication No. 1-34470

In the prior art, a pop filter having a predetermined area is attached in front of the directional axis of the microphone each time it is used. Therefore, conventional pop filters are large, and when used for meetings or interviews, it has been a problem to hide the speaker so as to cover it. Further, in the technology disclosed in Patent Document 1, it is difficult to reduce pop noise because the flow of the air flow ahead of the pointing axis does not change sufficiently. Therefore, a pop filter that reduces pop noise with a simple configuration has been desired.

  An object of the present invention is to provide a microphone capable of reducing pop noise with a simple configuration.

The present invention
A microphone unit which has a diaphragm and converts sound into an electric signal;
And a pop filter covering the microphone unit,
The pop filter is provided with a sound wave introduction surface having an angle with respect to the diaphragm at a portion in front of the diaphragm .
The wave guide surface is characterized planar der Rukoto inclined toward the rear from the front of the directional axis of the microphone unit.

  According to the present invention, pop noise can be reduced with a compact configuration.

It is a partial side sectional view showing an embodiment of a microphone concerning the present invention. It is a sectional side view which shows embodiment of the pop filter for microphones concerning the present invention. It is a schematic diagram which shows the use condition of the pop filter for microphones of FIG. FIG. 5 is an enlarged side view showing the microphone of FIG. 4 and a pop filter for the microphone. It is a sectional side view which shows another embodiment of the pop filter for microphones concerning the present invention. It is a schematic diagram which shows the use condition of the pop filter for microphones of a reference example.

  Hereinafter, embodiments of a microphone and a pop filter for the microphone according to the present invention will be described with reference to the drawings.

Configuration of Microphone The microphone 1 according to the present embodiment shown in FIG. 1 covers the microphone unit 10 for converting sound into an electric signal, the case 20 containing the microphone unit 10, and the case 20. And a pop filter 30.

  The microphone unit 10 is a unidirectional electret condenser microphone unit. The microphone unit 10 includes a diaphragm 11 that vibrates by voice, a circuit board 12 on which necessary electronic components are mounted, and a unit case 13 that accommodates the diaphragm 11, the circuit board 12, and the like. The microphone unit 10 incorporates voice from two directions of the front opening 21 and the rear opening 22 with the diaphragm 11 interposed therebetween, to realize unidirectionality.

  The housing 20 is a substantially cylindrical member. The housing 20 covers the microphone unit 10. The housing 20 is provided with a front opening 21 at the front and a rear opening 22 at the side.

Configuration of Pop Filter As shown in FIG. 2, the pop filter 30 includes a filter body 31, a housing portion 32, a sound wave introduction surface 33, and a rectifying member 34. The pop filter 30 is attached to the housing 20 to cover the diaphragm 11 of the microphone unit 10.

  The filter main body 31 is made of the same material as a general wind screen, for example, a material which can pass air such as polyurethane. The filter body 31 is provided with a housing portion 32 and a sound wave introduction surface 33. The filter body 31 defines a schematic shape of the pop filter 30.

  The housing portion 32 has a shape corresponding to the shape of the housing 20 and is open at the rear end side of the pop filter 30. The housing 20 is housed in the housing portion 32 by inserting the housing 20 of the microphone 1 from the open rear end side. For example, the housing 20 has a substantially cylindrical shape, and the housing portion 32 also has a substantially cylindrical shape. Therefore, the front surface 201 and the side surface 202 of the housing 20 are covered by the filter main body 31 by the housing 20 being inserted into the housing portion 32.

  The sound wave introduction surface 33 is provided on the front portion in the sound collection direction of the microphone 1. The sound introduction surface 33 is located between the sound source and the front opening 21 of the microphone 1 when the microphone 1 is in use. Therefore, the sound wave is taken in from the sound source to the front of the diaphragm 11 of the microphone unit 10 through the sound wave introduction surface 33.

  As shown in FIG. 1, the sound wave introduction surface 33 has an angle with respect to the diaphragm 11 of the microphone 1 housed in the housing portion 32. Specifically, the sound wave introduction surface 33 is inclined from the front in the directional axis direction (spindle direction) to the rear (as tilting in the main axis direction with respect to the diaphragm 11). The inclination angle of the sound wave introduction surface 33 is preferably, for example, about 45 ° with respect to the diaphragm 11.

  The straightening member 34 is a fibrous (pile-like) member provided on the surface of the filter main body 31 including the sound wave introduction surface 33. The flow straightening member 34 extends vertically or substantially perpendicularly from the surface of the filter body 31. The rectifying member 34 is flocked on the surface of the filter main body 31 including the sound wave introduction surface 33 by, for example, electrostatic flocking.

  As shown in FIG. 3, of the air flow W of the sound wave emitted from the mouth of the speaker 200 by the sound wave introduction surface 33, the air flow W2 of high energy causing the pop noise is along the inclination of the sound wave introduction surface 33. Flow. Therefore, the air flow W2 does not reach the diaphragm 11 directly. That is, in the microphone 1, only the air flow W 1 of the desired sound wave can be introduced into the diaphragm 11 by the sound wave introduction surface 33 among the air flow W of the sound wave emitted from the mouth of the speaker 200. The microphone 1 is particularly effective for sound waves having high instantaneous sound pressure caused by the burst sound.

  The inclination direction of the sound wave introduction surface 33 is preferably such that the thickness of the filter main body 31 is larger than the pop noise source (the mouth of the speaker 200, the air outlet of the air conditioner, etc.). Specifically, the inclination direction of the sound wave introduction surface 33 is preferably inclined in a direction away from the sound source of pop noise (from the upper left to the lower right in FIG. 3).

  As shown in FIG. 4, the flow control member 34 provided on the surface of the filter main body 31 including the sound wave introduction surface 33 has a property of being bent by the air flow W2. 4, the flow straightening member 34 is bent from the upper left to the lower right of FIG. 3 due to the influence of the air flow W2 as compared with the flow straightening member 34 not affected by the air flow W2 shown in FIG.

  By the rectifying member 34, in the microphone 1, the flow direction of the air flow W2 causing the pop noise can be rectified in the direction away from the front opening 21 to reduce the pop noise. Moreover, in the microphone 1, the energy of the air flow W2 can be consumed by the rectifying member 34, and pop noise can be reduced.

  In the pop filter 30 described above, although the example in which the rectifying member 34 is provided on the surface of the filter main body 31 has been described, pop noise is generated even if the pop filter 30A does not have the rectifying member 34 as shown in FIG. It can be reduced.

Reference Signs List 1 microphone 10 microphone unit 11 diaphragm 12 circuit board 13 unit case 20 case 21 front opening 22 rear opening 30 pop filter 31 filter main body 32 housing 33 sound wave introducing surface 34 rectifying member

Claims (8)

A microphone unit which has a diaphragm and converts sound into an electric signal;
And a pop filter covering the microphone unit,
The pop filter is provided with a sound wave introduction surface having an angle with respect to the diaphragm at a portion in front of the diaphragm .
The acoustic wave introduction surface, Ru plane der inclined toward the rear from the front of the directional axis of the microphone unit,
Microphone. The sound wave introduction surface is provided with a rectifying member that rectifies an air flow,
The microphone according to claim 1. The flow straightening member is a fibrous member extending perpendicularly from the sound wave introduction surface.
The microphone according to claim 2. The rectifying member is flocked on the sound wave introduction surface by electrostatic processing.
The microphone according to claim 2 or 3. A housing covering the microphone unit;
An opening provided at the front of the housing;
Have
The pop filter covers the microphone unit through the housing.
The microphone according to any one of claims 1 to 4 . A pop filter for use in a microphone including a microphone unit having a diaphragm and converting sound into an electric signal, and a case covering the microphone unit,
A filter body having a shape that covers the housing;
A housing portion having a shape corresponding to the housing;
Have a, a sound wave introduction surface having an angle with respect to the diaphragm of the microphone unit is accommodated in the accommodating portion provided in the filter body,
The acoustic wave introduction surface, Ru plane der inclined toward the rear from the front of the directional axis of the microphone unit,
Microphone pop filter. The sound wave introduction surface is provided with a rectifying member that rectifies an air flow,
The pop filter for a microphone according to claim 6 . The flow straightening member is a fibrous member extending perpendicularly from the sound wave introduction surface.
The pop filter for a microphone according to claim 7 .

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