JPH07501194A - User-selectable noise-proof portable microphone - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] User-selectable noise-proof mobile microbon technology field FIELD OF THE INVENTION This invention relates generally to microphones, and more particularly to directional microphones. .

Background technology Directional microphones utilize a front boat and a rear boat to separate the two faces. It senses the instantaneous difference in air pressure across the surface. towards the front of the microphone When an undesirable sound comes from the front of the user who is speaking directly, it is first heard from the rear entrance. and reaches the front entrance (facing the user) after a distance delay.

The internal delay from the rear inlet to the diaphragm should be adjusted to compensate for the distance delay. Optimally designed to filter out unwanted sounds from both entrances simultaneously reaches the diaphragm and is therefore canceled out. Directional microphones are traditionally portable It has been used for equipment. In many applications, directional microphones are It is placed remotely so that one hand is free, such as by being attached to a root. Figure 1 shows an example of attaching the microphone 102 to the operator's clothing. micro The phone 102 includes a front boat 104 and an aft boat 108 (back side, not shown). nothing. The operator can no longer speak directly into the front boat, so he The timing at which the sound waves arrive at the rear boat 108 is determined by the timing at which the sound waves arrive at the front entrance 104. The timing of the sound wave will be different from that of the sound wave. For the operation of the directional microphone 102, This timing shift, which is important for reduce the level of electrical signals generated by This problem is very has serious implications, the operator must remove the microphone and be forced to pick up and use it in a way that defeats the purpose of its remoteness. did This allows the operator to directly face the microphone in a hand-free manner. There is a clear need for directional microphones that can be used without speaking. .

Summary of the invention Briefly, a noise-proof microphone device according to the present invention is disclosed. This micro The phone consists of a housing and an acoustic transducer mounted within the housing. It will be done. The housing has #1 and second sides, and the transducer is located on the first and second sides of the housing. and a first and second acoustic boat coupled to the second side and the second side, respectively. micro The bong is also coupled to one adjacent location of the acoustic boat on one side of the housing. It also includes attachment means. This mounting means allows the microphone to make a sound when attached. Intended to mount the microphone on the user so that the sound port is substantially closed are doing.

Brief description of the drawing FIG. 1 is a diagram showing how the microphone according to the present invention is attached to the clothes of an operator. Ru.

Figures 2a and 2b illustrate a hook-and-loop fastener according to the invention. A directional microphone is shown showing its installation.

Figures 3a and 3b illustrate a directional miter clip-on fastener according to the present invention; Showing Crohon.

FIG. 4 is a block diagram of a transmitter according to the present invention.

FIG. 5 is a diagram of the internal elements of a microphone according to the invention.

BEST MODE FOR CARRYING OUT THE INVENTION FIG. 2a is a perspective view of a microphone 202 according to the invention. This micro The boat 202 includes an aft boat 204 and a front boat (not shown). These two The two boats are connected to a directional transducer included in the electronics of microphone 202. It will be done. The front and rear boats 204 send active sound waves to the transducer and generate proportional electricity. Generate a signal. Effective sound waves include waves from ambient noise signals. front boat and rear The component boat 204 cooperates with a directional transducer to make the microphone 202 directional. do. The operation of directional microphones is well known in the art. directed towards the front boat The generated sound waves are appropriately converted into electrical signals. However, it is aimed at a specific boat. No noise waves are canceled out. The rear boat 204 has a microphone 202 on a stand. Velcro (Velcro) is used to attach Gj to the operator's clothing. ) piece (216) (Velcro) and other hook-and-loop fasteners ( O volume adjustment surrounded by hook and 1oop fastener) The section and the channel selection section are indicated by 212 and 214, respectively. It has nothing to do with inventions. The screw type connector 206 is suitable for use with micro devices such as communication devices, for example. A microphone 202 is provided for connecting the microphone 202 to a device that uses the microphone. on hand The connection between the type microphone 202 and the connector 206 is made by a cable 210. It will be done. Velcropa constructed by means of hook-and-loop fasteners 2081, the operator may attach the microphone 202 to his or her clothing or belt. used for attaching. Vuelcro Batch 208 can be used with adhesive or safety pins. Place and attach it to the operator's clothing or belt, or simply sew it on. Ku. Later, when the operator wants to use the microphone 202 without holding it in his hand. Then, the operator only has to fit the two Velcro pieces 208, 216 together.

Figure 12b shows the Velcro piece of the microphone 202 attached to the Velcro batch 208. Shown is the attached state. Attach microphone 202 to Vuelcro batch 208. Once attached, the aft boat 204 is in a closed state. This blockage causes the rear boat to The flow of acoustic signals to 204 is significantly reduced so that only the front boat receives acoustic signals. It becomes a means of receiving. With only one boat in operation, microphone 20 2 is directional. This means that the impact of the ambient noise canceling boat is virtually minimized. . As mentioned earlier, the conversion from directional microphone 202 to omnidirectional is completely selective and automatic. This means that the operator can place the microphone on his When removed from the boat or belt, the blockage condition of the rear boat 204 disappears, and as a result, , microphone 202 returns to the directional mode of operation. This generally means that the operator Occurs when holding the microphone 202 and intending to speak into it .

In summary, a directional microphone 202 with a front boat and a rear boat , hook-and-loop fasteners such as Vuelcro Punch 208 When attached to the Perator's clothing, it becomes omnidirectional. Vuelcro Batch 208 When attached to the Velcro piece, the aft boat 204 is shielded. Rear boat 20 4 is shielded, the noise-proofing effect inherent to the directional microphone 202 is maximized. Become small.

Figure 3a is a side view of another embodiment of the invention. The microphone device 302 is 304 and a rear port 308. these two boats 30 4,308 is in normal hand-held operation when the operator is facing forward boat 304. When spoken directly, it becomes directional. Inside the microphone 302, there is a There is a converter to generate an electrical signal in response. Ambient noise is microphone 30 The noise-proofing function of No. 2 largely eliminates the conversion into electrical signals. Clip 31 0 is used to clip the microphone 302 to the operator's shirt or belt. This serves as a mounting means for the microphone 302. Cable 306 connects microphone 3 02 and an electronic device using this microphone 302.

As seen in Figure 3a, the rear boat 308 is open and the microphone 302 indicates that the motion is directional.

Figure 3b shows the microphone 3 attached to the operator's clothing or belt. 02 is shown. A portion of the garment or belt is indicated at 312. Belt 312 is is pushed in by the pad 314 and thus shields the rear port 308. I know what you're doing. The material used for pad 314 is preferably rubber. Rear port This shielding of the circuit 308 significantly reduces the input of sound waves into the transducer of the microphone 302. reduce Directional operation of microphone 302 is dependent on rear port 308. The result is an omnidirectional microphone of 3°2. Microphone 302 is omnidirectional When in sex mode, the position of the operator's mouth and the position of the two boats 304, 308 The location has no meaning from a noise control standpoint. Again, from directional to non-directional The conversion is user-selectable and requires no additional action by the operator. is obvious.

Additionally, the shielding of the rear port 308 can be performed by a switch, preferably a mechanical switch. This can be achieved with a switch. Operator activates mechanical switch This allows the rear bow) 308 to be shielded. intended for remote operation Microphones that do not have a built-in microphone can take advantage of such a switch particularly conveniently.

In summary, the directional microphone 302 attaches the microphone to the operator's clothing. The clipping action converts it into an omnidirectional microphone. micro microphone 3 by clipping the phone 302 to the operator's clothing. The rear port 308, which provides noise isolation to the 02, is shielded. This shielding This reduces the effectiveness of the noise-proofing operation of the clophon 302.

FIG. 4 is a block diagram of a transmitter according to the present invention. The transmitter 402 is a micro It is coupled to microphone 202 via phone cable 210 . microphone The audio signal from 202 is sent to transmitter 402 and transmitted via antenna 406. It will be done. The microphone 202 is attached to a person's clothing using a Velcro punch 208. This reduces the noise level reaching the rear port 204 (sound 1e). vel) is attenuated. This attenuation of the noise level at the rear port 204 is Reduces the noise isolation effect inherent in tropic microphones.

Next, FIG. 5 shows the inside of the microphone 302. The microphone 302 is located on the front 514 and a back surface 512. Front port 304 and rear bows) 308 are coupled to the front surface 514 and rear surface 512, respectively.

Microphone element 502 is shown as a transducer means for converting sound waves into electrical signals. Ru. The front boat 304 and rear port 308 are each connected to the front entry by an extension tube. It is coupled to a port 506 and a rear inlet 508. The diaphragm 504 has two surfaces Senses the instantaneous difference in air pressure that collides. This pressure difference at the diaphragm 504 is The diaphragm is moved and this mechanical movement produces an electrical output by the microphone element 502. converted into a signal. Clip 310 is placed in close proximity to rear port 308. Therefore, when the microphone 302 is attached to a person's clothing 312, the rear port shield from

In summary, as we know, the operation of directional microphones is is blocked when the user does not speak directly into it. In addition, many distant It is also well known that remote microphones are intended to be attached to the user's clothing. be. Such an installation allows the sound waves generated by the user to be directly connected to the microphone. This invention greatly obstructs the passageway and degrades performance (two leads. To minimize performance degradation of directional microphones. Front boat 304 and rear port A directional microphone 302 having a seat 308 is attached to the user's clothing. Ru. When the microphone 302 is attached, the pad 314 becomes a part of the user's clothing. into the aft port 308, resulting in the aft boat being shielded. . This shielding results in rear port 308 for operation of directional microphone 302. contribution is removed. Therefore, in order to achieve acceptable performance, the user must Eliminates the need to speak directly into the microphone.

Figure 1 Figure 5 mausoleum

Claims (7)

[Claims] 1. a housing having a first side and a second side; mounted within the housing; an acoustic transducer, the acoustic transducer being coupled to the first side surface and the second side surface of the housing, respectively; an acoustic transducer having a first acoustic port and a second acoustic port combined; and selectively and effectively connecting said second acoustic port when a microphone is attached to a user; one part of the housing to attach the microphone to the user so that it closes completely. mounting means coupled to a side surface in close proximity to the second acoustic port; A noise-proof microphone characterized by: 2. wherein said attachment means includes hook-and-loop fastener means. The noise-proof microphone according to claim 1. 3. The noise-proof microphone according to claim 1, wherein the attachment means includes a clip. Crohon. 4. 4. The noise damping mask of claim 3, wherein the clip includes a pressure pad. Iklophone. 5. Noise prevention according to claim 1, characterized in that the acoustic transducer includes a directional transducer. sound microphone. 6. In a portable microphone device that is attached to a person's clothing, the device teeth: A microphone element that converts sound waves into electrical signals, converting ambient noise into electrical signals. a first port and a second port that cooperate to substantially prevent the a microphone element; and The portable microphone may be attached to a person's clothing so as to selectively and substantially shield the second port. fixing means attached to the portable microphone for fixing it to; A portable microphone device comprising: 7. A communication device that: transmitter means for transmitting signals; and transmitter means for converting sound waves into electrical signals; Microphone means coupled to the transmitter means: a housing having a first side and a second side; mounted within the housing; on said first and second sides of the housing to substantially cancel out ambient noise; an acoustic transducer having a first port and a second port each coupled; affixing microphone means to the person's clothing to selectively shield said second port; said second side of the microphone means to be connected to said second port of the transducer. fixing means mounted in qualitatively close proximity; Microphone means characterized in that it is constituted by; A communication device comprising: