CN1441623A

CN1441623A - Pick-up of microphone

Info

Publication number: CN1441623A
Application number: CN 02106535
Authority: CN
Inventors: 苏庚癸
Original assignee: Individual
Current assignee: Individual
Priority date: 2002-02-27
Filing date: 2002-02-27
Publication date: 2003-09-10

Abstract

This invention relates to a microphone pick-up device containing an isolation piece forming a first sapce connecting to outside and a second space isolated from the first, a first conversion unit in the first space for outputting a corresponding electric signal according to the sound wave entering into the first space, a third conversion unit in the second space used for outputting a corresponding electric signal according to the sound wave entering into the second space, reverse-phase connection of the output of the first and second conversion units can cancel the electric signal of the touching noise synchronously output at the said output end to prevent from touching noise.

Description

The sound pick up equipment of microphone

Invention field

The invention relates to a kind of sound pick up equipment of microphone, be meant especially a kind of with two respectively first bridgeware of the signal of telecommunication of exportable corresponding sound wave and second bridgeware the anti-phase connection of output, make touch shake-up hum ripple that a microphone produced in first bridgeware and second bridgeware synchronously the signal of telecommunication of output offset sound pick up equipment with the microphone that can eliminate touch noise of microphone.

Background technology

Consult shown in Figure 1, general wireless microphone 1 includes the pedestal 11 that is provided with an amplifying circuit 111 in, one is connected with the radio reception body 12 on this pedestal 11, an and switch 13 of being located on this pedestal 11 and electrically connecting with this amplifying circuit 111, this radio reception body 12 includes a housing 121 that offers a plurality of netted perforates 122, one defines the accommodation space 123 that is communicated with each perforate 122 by this housing 121, one is located in this accommodation space 123 and is electrically connected to the pick-up 124 of this switch 13, when this switch 13 is opened (state that is ON), this pick-up 124 is to be electrical downlink connection state with this amplifying circuit 111, the sound wave that near radio reception body 12 sound source is sent, can enter in this accommodation space 123 by these perforates 122, and induce the signal of telecommunication that should sound wave by this pick-up 124, exporting this amplifying circuit 111 to amplifies this signal of telecommunication, after modulation becomes transmitting audio frequency, be emitted to a receiver by antenna, be demodulated to sound wave again, and amplified and the broadcast that amplifies; But, as long as touch arbitrary place of this microphone, all can produce a fluctuation near this microphone 1 air own, and enter in this accommodation space 123 by these perforation 122, and make this pick-up 124 produce a signal of telecommunication, and after amplifying, this amplifying circuit 111 enlarges and very ear-piercing noise by receiver output one, and above-mentioned noise is as long as under this microphone 1 user mode, touching microphone promptly can produce, and can't avoid, only can when using, avoid touching this microphone, therefore as far as possible, the touch noise that microphone produced is an industry problem extremely to be solved, and brag about noise-free microphone at present on the market, only be to be installed on the above-mentioned pick-up, to reach shock-proof effect with rubber or spring, yet effect is little, the souffle problem that can't fully solve microphone and produced.

Summary of the invention

Purpose of the present invention is that a kind of sound pick up equipment that can eliminate the microphone noise fully is being provided.

The sound pick up equipment of microphone of the present invention includes a separator, one first bridgeware, and one second bridgeware.This separator is located on this microphone, is separated out first space that communicates with the external world with the inside with this microphone, and second space isolated with this first space; This first bridgeware is located in first space, and has the sensing element that can export the corresponding signal of telecommunication according to entering the sound wave first space in, and respectively with a positive output end and a negative output terminal of this sensing element electric connection; This second bridgeware is located in second space, have one and can comply with the sensing element that enters the sound wave in second space and induce the corresponding signal of telecommunication, and the positive output end and the negative output terminal that electrically connect with this sensing element respectively, and this positive output end and negative output terminal are to electrically connect with the positive output end of first bridgeware and negative output terminal respectively, the hum ripple that produces so that touch this microphone, synchronously at this first bridgeware and the identical signal of telecommunication of second bridgeware output, and then offset, just can avoid touch noise to produce.

Description of drawings

Fig. 1 is the schematic diagram of general microphone.

Fig. 2 is the schematic diagram of the present invention's first preferred embodiment.

Fig. 3 is the part schematic diagram of this first preferred embodiment.

Fig. 4 is the schematic diagram of the present invention's second preferred embodiment.

Wherein, label is described as follows in the accompanying drawing: 3 microphones, 31 pedestals, 311 amplifying circuits, 312 second spaces, 32 footstocks, 321 perforates, 322 first spaces, 4 sound pick up equipments, 41 separators, 411 perforation, 42 first bridgewares, 43 second bridgewares 421,431 pick-ups 422,432 positive output ends 423,433 negative output terminals, 424 shells 425,435 vibrating membranes 426,436 induced magnets 427,437 induction coil 44a, the first output group 44b, the second output group

Preferred embodiment

Consult shown in Fig. 2,3, the used microphone 3 of first preferred embodiment is to be a wire microphone, the pedestal 31, one that has a hollow form and have a plurality of lead-out terminals 311 is located on this pedestal 31 and is offered a plurality of perforates 321 and be the footstock 32 of hollow form, and sound pick up equipment 4 of the present invention is to be located on this microphone 3, include one and be connected with in separator 41, one first bridgeware 42, one second bridgeware 43 of 32 of this pedestal 31 and this footstocks, and a circuit board 44; This separator 41 is to have a perforation 411 plate body for one, enclose formation first space 322 with this footstock 32, and enclose formation second space 312 with this pedestal 31, and this first space 322 communicates with the external world by all perforates 321 on this footstock 32, this circuit board 44 is provided with and is positioned in this perforation 411, moreover, this first bridgeware 42 is connected with on this separator 41, and stretch and place first space 322, this first bridgeware 42 has a pickup amount 421, and electrically connect and be connected to a positive output end 422 and a negative output terminal 423 on this circuit board with this pick-up 421, and this pickup 421 is to be a DYN dynamic pick-up, have inner for hollow and block in the shell 424 in perforation 411 outsides of this separator 41, one is located at the vibrating membrane 425 on this shell 424, and one be located in this shell 424 and be positioned at the induced magnet 426 of these vibrating membrane 425 belows, and one be set around this induced magnet 426 and with these just, negative output terminal 422,423 induction coils 427 that electrically connect convert the signal of telecommunication in order to the sound wave that will be received; 43 of this second bridgewares are connected with on this separator 41, and stretch and place second space 312, this second bridgeware 43 has a pick-up 431, reach with this pick-up and just electrically connecting, negative output terminal 432,433, and this is being just as shown in Figure 3, negative output terminal 432,433 electrically connect with the positive output end 422 of first bridgeware 42 and negative output terminal 423 respectively, and respectively at the second output group 44b that forms one first output group 44a and a ground connection on this circuit board 44, and through the lead-out terminal 311 of this microphone, be electrically connected to an output circuit (not shown) for the amplification output circuit of the sound amplifier output that amplifies, and being pick-ups 421 with first bridgeware 42, above-mentioned pick-up 431 is DYN dynamic pick-up, construct identical, and for the same signal of telecommunication of the convertible output of same sound wave, so be not described in detail in this, in addition, by these pick-ups 421,431 and these circuit board 44 envelope shelves in the perforation 411 of this separator 41, make that this separator 41 can be isolated fully with first space 322 and second space 312 of both sides, simultaneously also make second space 312 be isolated from the outside, therefore, the sound wave that extraneous sound generation source is sent, only can enter first space 322 by these perforates 321, can't enter second space 312, and the outside arbitrary structure (as footstock or pedestal) because of touching this microphone 3, the shake-up hum ripple that microphone itself is produced, then can enter second space 312, and reach these perforates 321 by the external world and enter first space 322.

Therefore, the shake-up hum ripple that is produced when touching this microphone 3, can enter simultaneously in first space 322 and second space 312, make each vibrating membrane 425 of first bridgeware 42 and second bridgeware 43 produce resonance, and make each induced magnet 436 produce relative magnetic field, make each induction coil 437 salty electric current that should go out correspondence, and the corresponding signal of telecommunication of formation, because above-mentioned first bridgeware 42 and second bridgeware 43 is to receive same shake-up hum ripple at one time, therefore the signal of telecommunication that is produced is also identical, so the signal of telecommunication in positive output end 432 outputs of the positive output end 422 of first bridgeware 42 and second bridgeware 43 is identical, and this positive output end 422 is connected the formed first output group 44a with this positive output end 432, the two identical signals of telecommunication can be offset, therefore this first output group 44a there is no any noise signals and exports this output circuit, can avoid the touch noise that is produced because of touching.

Moreover, the sound wave that sends when a sound generation source then only can enter this first space 322, and can't enter second space 312, then only export the signal of telecommunication of a correspondence to this first output group 44a by these first bridgeware, 42 relative these sound waves, because in the same time, second bridgeware 43 that is arranged in second space 312 does not receive this sound wave, and any signal of telecommunication of no-output is to this first output group 44a, so the sound wave that this sound generation source is sent can be by the relative signal of telecommunication of these first bridgeware, 42 outputs, directly by this first output group 44a output through this lead-out terminal 331 and the above-mentioned output circuit that arrives is amplified output, be the start that amplifies of general microphone, no longer describe in detail at this.

In addition, the first above-mentioned bridgeware 42 and the pick-up of second bridgeware 43 also can be general capacitive pick-up, this is a conventional device, so no longer describe its structure in detail at this, its action also is the corresponding signal of telecommunication of message conversion output that will be received, therefore the same with above-mentioned DYN dynamic pick-up, according to the noise ripple that enters simultaneously in first space 322 and second space 312, and the corresponding signal of telecommunication of output, and electrically connect by the positive output end 432 of the positive output end 422 of first bridgeware 41 and second bridgeware 43, the signal of telecommunication that makes 422 outputs of this positive output end is identical and offset with the signal of telecommunication that this positive output end 432 is exported, and can reach the effect of avoiding the touch noise that produced because of shake-up equally.

Sound pick up equipment of the present invention in addition also can use on wireless microphone, as shown in Figure 4, embodiment is identical with the first above-mentioned preferred embodiment major part, identically be in this and seldom narrated, only different being in promptly has one and is the output circuit 51 of amplification output circuit in microphone 5, and the first output group 44a of this circuit board 44 reaches the second output group 44b and is electrically connected to this output circuit, also can reach the generation of avoiding touch noise.

Explanation by the foregoing description, the sound pick up equipment utilization of wood invention microphone is arranged in first bridgeware and second bridgeware in two spaces that isolate, and by the anti-phase connection of the output of these bridgewares, make this pole bridgeware can correspondingly simultaneously touch the identical signal of telecommunication of hum ripple output, form the identical signal of telecommunication and offset in this output, can avoid touching the signal of telecommunication that is produced and enter this output circuit amplification output, reach the effect of eliminating touch noise.

The above only is preferred embodiment of the present invention, and therefore, the equivalent structure that all application patent specification of the present invention and claim are done changes, and ought to be included in the claim of the present invention.

Claims

1. the sound pick up equipment of a microphone, be and an output circuit electrically connects, can receiving sound wave, and converting this sound wave to the corresponding signal of telecommunication and export this output circuit to, this sound pick up equipment includes:

One separator is located on this microphone, is separated out first space that communicates with the external world with the inside with this microphone, and second space isolated with this first space;

One first bridgeware is located in first space, and has the pick-up that can export the corresponding signal of telecommunication according to entering the sound wave first space in, and respectively with a positive output end and a negative output terminal of this pick-up electric connection;

One second bridgeware is located in second space, and has a pick-up that can induce the corresponding signal of telecommunication according to entering the sound wave second space in, and respectively with a positive output end and a negative output terminal of this pick-up electric connection; And this positive output end and negative output terminal are to kick electric connection with the positive output end and the negative output of first bridgeware respectively, so that the signal of telecommunication that this first bridgeware and second bridgeware are exported is synchronously offset.

2. according to the sound pick up equipment of 1 described microphone of claim the, wherein, the pedestal, one that this microphone has a hollow form and ccontaining this amplifying circuit is located on this pedestal and is offered a plurality of perforates and be the footstock of hollow form, and this separator is to be connected with between pedestal and this footstock, this footstock and this separator enclose and constitute first space, this pedestal and this separator enclose and constitute second space, and this first space communicates with the external world by these perforates.

3. according to the sound pick up equipment of the described microphone of claim 1, wherein, this output circuit is to can be an amplification output circuit of being located in this microphone.

4. according to the sound pick up equipment of the described microphone of claim 1, wherein, this output circuit is to can be an amplification output circuit that is arranged in other device.

5. according to the sound pick up equipment of the described microphone of claim 1, wherein, the equal ground connection of negative output terminal that this first bridgeware and second bridgeware electrically connect, and the positive output end of first bridgeware and the electric connection of second bridgeware is to be electrically connected to this output circuit.

6. according to the sound pick up equipment of the described microphone of claim 1, wherein, the pick-up of this first bridgeware and second bridgeware is DYN dynamic pick-up.

7. according to the sound pick up equipment of the described microphone of claim 1, wherein, the pick-up of this first bridgeware and second bridgeware is capacitive pick-up.