CN207266290U - A kind of condenser microphone of narrow angle directive property - Google Patents

Abstract

The utility model discloses a kind of condenser microphone of narrow angle directive property, including mounting bracket, it is used for transmission the transfer wire of acoustical signal and is provided with the gauze screen of micropore, inner chamber body is formed in gauze screen, mounting bracket is arranged within inner chamber body and is close to inner chamber body inner wall, sound head module is provided with mounting bracket, sound head module is connected with transfer wire, gauze screen can be very good to play the role of shielding interference for sound head module, and the frequency response deterioration, phase distortion, directive property for helping to overcome traditional sound head to have degenerate and the technical disadvantages such as directive property angle is excessive.Therefore, the utility model can optimize directive property, and reduction is uttered long and high-pitched sounds, and improve the sound transmission gain of sound reinforcement system, can be widely applied to the fields such as public broadcasting and meeting room, can also be used as camera-shooting and recording device.

Description

A kind of condenser microphone of narrow angle directive property

Technical field

A kind of microphone is the utility model is related to, especially a kind of condenser microphone of narrow angle directive property.

Background technology

Electret capacitance microphone (abbreviation ECM), is also electret type capacitance sound head, hereinafter referred to as sound head, is mainly used for sound Electric signal is changed, and is a kind of very extensive electro-acoustic element of purposes, particularly common in fields such as broadcast, communication and meeting rooms.

Microphone species under the prior art is various, and most of microphone is since structure design is improper, and there is frequency sound Answer curve uneven, the local common fault for obvious peak valley occur, the especially frequency when incidence angle is 90 °, 180 ° and 270 ° Rate response curve deterioration is more prominent.Due to the unevenness of the frequency response curve of each incidence angle, so as to destroy microphone Directive property even makes pickup directive property lose in a local frequency range；And the directive property angle of the microphone of the prior art is too big, Pickup ability is inadequate, utters long and high-pitched sounds so as to easily cause, and has limited to the raising of sound reinforcement system sound transmission gain.

Utility model content

To solve the above-mentioned problems, the purpose of this utility model is to provide a kind of condenser microphone of narrow angle directive property, body Product is small, and performance is high, low cost, has the gauze screen for being provided with micropore, overcomes the frequency response of current sound-conducting apparatus generally existing The deficiency that deterioration, phase distortion, directive property degenerate with the technology such as directive property angle is excessive, can optimize directive property, and reduction is uttered long and high-pitched sounds, from And improve the sound transmission gain of sound reinforcement system.

To solve the above-mentioned problems, the technical solution adopted in the utility model is：

A kind of condenser microphone of narrow angle directive property, including mounting bracket, be used for transmission the transfer wire of acoustical signal and open There is the gauze screen of micropore, inner chamber body is formed in gauze screen, mounting bracket is arranged within inner chamber body and is close to inner chamber body inner wall, Sound head module is provided with mounting bracket, sound head module is connected with transfer wire.

Further, sound head module includes positive polarization sound head and negative polarization sound head, between positive polarization sound head and negative polarization sound head It is connected by transfer wire.

Further, miaow core print seat is further included, the undertaking ring of connection function is played and is used to support the gooseneck miaow bar of miaow core print seat, installation Stent is connected with miaow core print seat by accepting ring, and miaow core print seat is connected with gooseneck miaow bar.

Further, circuit board is provided with miaow core print seat, is provided with circuit board for prompting the sound head module work shape The indicator light of state.

Further, lamp ring is provided with miaow core print seat, circuit board and indicator light are arranged within lamp ring.

Further, the light transmission piece for being helpful in indicate that the light that lamp is sent outwards projects is provided with lamp ring.

Further, it is additionally provided with mounting bracket for separating mechanical resonance and what is produced in use due to vibrations is rubbed The anti-vibration sleeve of noise is wiped, anti-vibration sleeve is connected together with positive polarization sound head and negative polarization sound headgear respectively.

Further, the dirt-proof boot for stopping dust is additionally provided with mounting bracket, it is dust-proof to be set on positive polarization sound head Top and within the inner chamber body.

Further, gauze screen outer cup is useful for the sponges cover of wind and water preventing.

The beneficial effects of the utility model are：A kind of condenser microphone of narrow angle directive property provided by the utility model, bag Include the gauze screen for being provided with micropore, in mounting bracket is coated on by gauze screen, sound head module be arranged in mounting bracket and with for The transfer wire of transmission acoustical signal is connected, and mounting bracket is used for reasonable installation sound head module and keeps the stabilization in its structure Sound head module is connected into circuit by property, transfer wire, with ensure sound head module can normal use, gauze screen can be very good as sound Head module plays the role of shielding interference, helps to overcome the frequency response deterioration of current sound-conducting apparatus generally existing, phase abnormal Become, the deficiency that directive property degenerates with the technology such as directive property angle is excessive.Therefore, the utility model can optimize directive property, reduce and make a whistling sound Cry, improve the sound transmission gain of sound reinforcement system, can be widely applied to the fields such as public broadcasting and meeting room, can also be used as camera-shooting and recording device Use.

Brief description of the drawings

The utility model preferred embodiment is provided below in conjunction with the accompanying drawings, to describe the embodiment of the utility model in detail.

Fig. 1 is the structure decomposition figure of the microphone of the utility model；

Fig. 2 is the overall structure figure of the microphone of the utility model；

Embodiment

With reference to Fig. 1, a kind of condenser microphone of narrow angle directive property, including mounting bracket 1, the transmission for being used for transmission acoustical signal Conducting wire 2 and the gauze screen 3 for being provided with micropore, form inner chamber body 31 in gauze screen 3, mounting bracket 1 be arranged within inner chamber body 31 and It is close to 31 inner wall of inner chamber body, sound head module 4 is provided with mounting bracket 1, sound head module 4 is connected with transfer wire 2.

Specifically, mounting bracket 1 is used for reasonable installation sound head module 4 and keeps the stability in its structure, is used for transmission Sound head module 4 is connected into circuit by the transfer wire 2 of acoustical signal, to ensure that sound head module 4 being capable of normal use；Sound hair is influenced to go out One key factor of sound wave is acoustic impedance, it is a plural number, and real part is acoustic resistance, and imaginary part is acoustic reactance, wherein acoustic resistance part pair The frequency and phase of sound wave have little to no effect, and acoustic reactance part can especially be segmented frequency and phase in medium-high frequency, produce Significantly affect, the gauze screen 3 in the utility model includes metal thin shell, and metal thin shell includes side piece and top sheet, side Micropore is provided with piece and top sheet, is worked by theoretical direction and many experiments, when gauze screen 3 meets the following conditions：It is micro- Bore dia is 0.2-0.8mm, and metal thin shell percent opening is 50% or more, and the micropore in side on piece accounts for side piece area 50% or more, the spacing of two neighboring micropore is 0.5mm, and the thickness of top sheet and side piece is 0.3mm, then gauze screen 3 In the range of 20Hz-20KHz have similar to pure acoustic resistance acoustic characteristic, traditional screening arrangement more using palisade window into Row shielding, sound wave are difficult to break through obstacle after entering the window, and due to the obstacle intervention in resistance, frequency of sound wave can be affected, Therefore it is in resistive that perfect condition, which is obstacle, and gauze screen 3 can meet this condition, i.e. gauze screen 3 can be very good as sound head mould Block 4 plays the role of shielding interference, can reduce metal thin shell to the frequency influence and phase through its sound propagated Influence, therefore can effectively reduce the obstruction to sound transmission, substantially increase the propagation efficiency to sound, help to overcome biography The frequency response that has of system sound head deteriorates, phase distortion, directive property degenerate and the technical disadvantages such as directive property angle is excessive, and this reality It of new gauze screen 3, can be made using metal thin shell by way of punching, metal net can also be utilized to form, It is not intended to limit the mode and pattern for forming gauze screen 3, it is only necessary to ensure a diameter of 0.2-0.8mm of micropore, two neighboring micropore Spacing be 0.5mm, and the thickness of gauze screen 3 is 0.3mm.Therefore, the utility model have small, performance high and The advantages of low cost, and directive property can be optimized, reduction is uttered long and high-pitched sounds, and is improved the sound transmission gain of sound reinforcement system, be can be widely applied to The field such as public broadcasting and meeting room, can also use as camera-shooting and recording device.

Wherein, with reference to Fig. 1, sound head module 4 includes positive polarization sound first 41 and negative polarization sound first 42, and positive polarization sound first 41 is with bearing It is connected between polarization sound first 42 by transfer wire 2, ensure that two sound heads can be accessed in circuit, so as to normally transmit Sound wave, in the present embodiment, positive polarization sound first 41 and negative polarization sound first 42 be all referring to Xiang Yintou, certainly, according to actual conditions, It is all referring to another is that list is directed toward sound head for single direction, or both, if while positive polarization sound first 41 that can also be one It is coaxially disposed with negative polarization sound first 42, and the phase of output signal of two sound heads is opposite, then, arrived by adjusting two sound heads Specific output amplitude, can be such that the sound head module 4 is changed between cardioid directivity and 8-shaped directive property, so as to Wider occasion is applicable in, receives and imitates with more preferable sound than traditional only sound-conducting apparatus with single cardioid directivity Fruit, moreover, can also by presetting the corresponding output amplitude of sound head module 4, come select accordingly circle be directed toward, the super heart Shape is directed toward or super direction, and purposes is more extensive, is particularly suitable for long distance security protection sound monitoring, shooting, scientific research and military surveillance etc. Field, breaches the single bottleneck of the directive property of conventional art；In addition, positive polarization sound first 41 within negative polarization sound first 42 with distinguishing Be provided with impedance transformation element, impedance transformation element most electroacoustic signal can be changed be limited within two sound heads into OK, interfering with each other between two sound heads is avoided, those skilled in the art can also select：Positive polarization sound first 41 and negative polarization sound First 42 share an impedance transformation element.

Wherein, referring to Figures 1 and 2, miaow core print seat 5 is further included, the undertaking ring 6 of connection function is played and is used to support miaow core print seat Gooseneck miaow bar 7, mounting bracket 1 are connected with miaow core print seat 5 by accepting ring 6, and miaow core print seat 5 is connected with gooseneck miaow bar 7, accept ring 6th, miaow core print seat 5 and gooseneck miaow bar 7 are integrally formed, the stable structure of common guarantee mounting bracket 1 and sound head module 4, into one Step ensures that the utility model can work normally；In addition, when gauze screen 3 is sleeved on mounting bracket 1, mounting bracket 1 and screen At the contact position for covering the opening of net 3, mounting bracket 1 is both provided with riveting screens with gauze screen 3, and two riveting screens mutually block Close so as to fixed mask net 3 position, and the utility model be additionally provided with for connect power supply accessory power outlet 11, rise protection The transition sleeve 13 of effect and the locking for fixing accessory power outlet 11 cover 12, and gooseneck miaow bar 7 is connected with transition sleeve 13, transition sleeve 13 are connected by locking set 12 with accessory power outlet 11, and 11 outer cup of accessory power outlet is useful for the guarantor of protection accessory power outlet 11 Sheath, these designs further increase the security and stability of the utility model, greatly reduce failure rate, facilitate user to make With locking set 12 can be the nut of fixation and have certain sticky sheet metal or non-metal plate etc., transition sleeve 12 Can be flexible sliding sleeve or the integrative-structure being made of some separate type shreds etc., protective case can be sponges cover, Can also plastic foam be made for material of main part, certainly, as long as can implement its function, those skilled in the art can be right These components carry out other corresponding replacements.

Wherein, with reference to Fig. 1, circuit board 51 is provided with miaow core print seat 5, is provided with circuit board 51 for prompt tone head module The indicator light 52 of 4 working statuses, further ensures the stabilization of 5 internal structure of miaow core print seat, in actual use, what user sent If sound is picked up by sound head module 4, i.e., acoustical signal is picked, and then acoustical signal is by the impedance transformation element in sound head module 4 Electric signal is converted to, electric signal is transmitted to circuit board 51 by transfer wire 2, then 52 meeting of indicator light being arranged on circuit board 51 Light, conversely, will not then light, therefore can whether be lighted by indicator light 52 to judge whether acoustical signal is picked, this is sentenced Disconnected mode is succinctly directly perceived, and talk situation is adjusted in time easy to user.

Wherein, with reference to Fig. 1, be provided with lamp ring 53 on miaow core print seat 5, circuit board 51 and indicator light 52 be arranged at lamp ring 53 it It is interior, the stabilization of 5 internal structure of miaow core print seat is further ensured, in the present embodiment, common lamp ring 53 is transparent, and benefit is The light that indicator light 52 can be sent as far as possible outwards scatters, to play prompting effect, certainly, those skilled in the art Other suitable lamp rings can be selected according to the different colours of indicator light 52.

Wherein, with reference to Fig. 1, the light transmission piece for being helpful in indicate that the light that lamp 52 is sent outwards projects is provided with lamp ring 53 531, light transmission piece 531 is conducive to converge the light that indicator light 52 is sent, and these light more collect after being projected out of light transmission piece 531 In, therefore brightness higher, preferably prompting effect can be played.

Wherein, with reference to Fig. 2, be additionally provided with mounting bracket 1 for separate mechanical resonance and in use due to vibrations and The anti-vibration sleeve 8 of the attrition accentuated of generation, anti-vibration sleeve 8 respectively first with positive polarization sound 41 and negative polarization sound first 42 connect together, prevent Shake set 8 can play the role of Shockproof damping, avoid beating caused by carelessness and causing sound head module 4 to be damaged, while also may be used Prevent from introducing the friction noise produced by vibrations；Meanwhile for the sound reception being optimal, to mounting bracket 1 Percent opening needs to reach 70%-90%, even more high, and the outer wall of whole mounting bracket 1 is fitted close with gauze screen 3, is made Obtaining gauze screen 3 can have effective support to protect.

Wherein, with reference to Fig. 2, the dirt-proof boot 9 for stopping dust is additionally provided with mounting bracket 1, dirt-proof boot 9 is arranged on just The top of polarization sound first 41 is simultaneously within inner chamber body 31, and dirt-proof boot 9 occupies the region for being easily stained with ash, can be to avoid positive polarization sound First 41 are stained with too many dust, and those skilled in the art also may be selected be embedded in dirt-proof boot 9 elsewhere, as long as can reach dust-proof Purpose；In addition, being provided with grounded metal sheet among mounting bracket 1, metal thin shell is connected by grounded metal sheet and referred to Ground, specifically, is provided through the gap of internal and external walls in mounting bracket 1, grounded metal sheet is arranged among the gap, ground connection One end of sheet metal is connected with metal thin shell, its other end is connected with the ground wire in transfer wire 2, therefore, metal thin shell Good earthing effect can be obtained, so that gauze screen 3 plays good shielding action.

Wherein, referring to Figures 1 and 2,3 outer cup of gauze screen is useful for the sponges cover 10 of wind and water preventing, except with windproof Beyond waterproof action, mainly prevent from being stained with dust in inner chamber body relative to dirt-proof boot 9, it is outer that sponges cover 10 can also be used to absorption The dust in portion, while see that the external structure that sponges cover 10 is the utility model adds aesthetic feeling on the whole.

The gauze screen 3 of the utility model, does not limit to its specific shape, can be cylinder, or and it is square, only Need matched sound head that there is matched shape, in addition, the gauze screen 3 of the utility model, additionally it is possible to applied to battle array The sound head of column structures, has wide applicability, can effectively improve the receiving efficiency to sound.

Preferred embodiment and basic principle of the above content to the utility model are discussed in detail, but the utility model is simultaneously The above embodiment is not limited to, those skilled in the art should be recognized that in the premise without prejudice to the utility model spirit Under also have various equivalent variations and replacement, these equivalent variations and replace both fall within claimed the scope of the utility model.

Claims (9)

1. a kind of condenser microphone of narrow angle directive property, including mounting bracket (1) and the transfer wire for being used for transmission acoustical signal (2), it is characterised in that：The gauze screen (3) for being provided with micropore is further included, inner chamber body (31), the peace are formed in the gauze screen (3) Dress stent (1) is arranged within the inner chamber body (31) and is close to the inner chamber body (31) inner wall, in the mounting bracket (1) Sound head module (4) is provided with, the sound head module (4) is connected with transfer wire (2).

A kind of 2. condenser microphone of narrow angle directive property according to claim 1, it is characterised in that：The sound head module (4) positive polarization sound head (41) and negative polarization sound head (42) are included, between the positive polarization sound head (41) and negative polarization sound head (42) It is connected by the transfer wire (2).

A kind of 3. condenser microphone of narrow angle directive property according to claim 1, it is characterised in that：Further include miaow core print seat (5), play the undertaking ring (6) of connection function and be used to support the gooseneck miaow bar (7) of the miaow core print seat (5), the mounting bracket (1) It is connected with miaow core print seat (5) by the undertaking ring (6), the miaow core print seat (5) is connected with gooseneck miaow bar (7).

A kind of 4. condenser microphone of narrow angle directive property according to claim 3, it is characterised in that：The miaow core print seat (5) Circuit board (51) is inside provided with, the finger for prompting sound head module (4) working status is provided with the circuit board (51) Show lamp (52).

A kind of 5. condenser microphone of narrow angle directive property according to claim 4, it is characterised in that：The miaow core print seat (5) On be provided with lamp ring (53), the circuit board (51) and indicator light (52) are arranged within the lamp ring (53).

A kind of 6. condenser microphone of narrow angle directive property according to claim 5, it is characterised in that：On the lamp ring (53) The light transmission piece (531) that the light that being provided with contributes to the indicator light (52) to send outwards projects.

A kind of 7. condenser microphone of narrow angle directive property according to claim 2, it is characterised in that：The mounting bracket (1) anti-vibration sleeve (8) of the attrition accentuated for separating mechanical resonance and being produced in use due to vibrations, institute are additionally provided with Anti-vibration sleeve (8) is stated to connect together with the positive polarization sound head (41) and negative polarization sound head (42) respectively.

A kind of 8. condenser microphone of narrow angle directive property according to claim 2, it is characterised in that：The mounting bracket (1) dirt-proof boot (9) for stopping dust is additionally provided with, the dirt-proof boot (9) is arranged on the positive polarization sound head (41) Top is simultaneously within the inner chamber body (31).

9. according to a kind of condenser microphone of any narrow angle directive property of claim 1-8, it is characterised in that：The shielding Net (3) outer cup is useful for the sponges cover (10) of wind and water preventing.