CN109151691A - A kind of silicon miaow of adjustable directivity - Google Patents
A kind of silicon miaow of adjustable directivity Download PDFInfo
- Publication number
- CN109151691A CN109151691A CN201811139971.9A CN201811139971A CN109151691A CN 109151691 A CN109151691 A CN 109151691A CN 201811139971 A CN201811139971 A CN 201811139971A CN 109151691 A CN109151691 A CN 109151691A
- Authority
- CN
- China
- Prior art keywords
- sound
- microphone
- headstock
- pcba board
- adjustable
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 title claims abstract description 29
- 229910052710 silicon Inorganic materials 0.000 title claims abstract description 29
- 239000010703 silicon Substances 0.000 title claims abstract description 29
- RVCKCEDKBVEEHL-UHFFFAOYSA-N 2,3,4,5,6-pentachlorobenzyl alcohol Chemical compound OCC1=C(Cl)C(Cl)=C(Cl)C(Cl)=C1Cl RVCKCEDKBVEEHL-UHFFFAOYSA-N 0.000 claims abstract description 28
- 238000006243 chemical reaction Methods 0.000 claims description 4
- 230000035945 sensitivity Effects 0.000 abstract description 6
- 239000003990 capacitor Substances 0.000 description 18
- 238000010586 diagram Methods 0.000 description 8
- 230000005611 electricity Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- VIKNJXKGJWUCNN-XGXHKTLJSA-N norethisterone Chemical compound O=C1CC[C@@H]2[C@H]3CC[C@](C)([C@](CC4)(O)C#C)[C@@H]4[C@@H]3CCC2=C1 VIKNJXKGJWUCNN-XGXHKTLJSA-N 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 230000005236 sound signal Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R19/00—Electrostatic transducers
- H04R19/04—Microphones
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2201/00—Details of transducers, loudspeakers or microphones covered by H04R1/00 but not provided for in any of its subgroups
- H04R2201/003—Mems transducers or their use
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
- Circuit For Audible Band Transducer (AREA)
Abstract
The present invention relates to silicon miaow technical fields, specifically disclose a kind of silicon miaow of adjustable directivity, including sound headstock upper cover and sound headstock lower cover, PCBA board is equipped between the sound headstock upper cover and sound headstock lower cover, adjustable sound paper is equipped under the sound headstock in cap body, the upper surface of the PCBA board is equipped with upper microphone, the lower surface of PCBA board is equipped with lower microphone, upper microphone of the invention and lower microphone can pick up external sound source simultaneously, postpone the time that external sound source reaches lower microphone by controlling the density of adjustable sound paper, it will be exported after upper microphone and the source of sound comprehensive magnification of lower microphone pickup using PCBA board, both it had maintained all referring to the distinctive high sensitivity of silicon miaow, it is distorted the good characteristic of small and consistency, meet the pickup demand being singly directed toward again simultaneously.
Description
Technical field
The present invention relates to silicon miaow technical field more particularly to a kind of silicon miaows of adjustable directivity.
Background technique
One complete public address system at least needs to include silicon miaow, expander and loudspeaker, be just able to amplify sound and
Output, however, audio signal is mainly switched to electrical signal by silicon miaow by its function mode, then by expander by the electrical signal
Amplify and send to loudspeaker, the electrical signal amplified is changed into sound by loudspeaker and is sent.Under this system, if silicon miaow milli
If non-directive, the reception sensitivity of the silicon miaow in all directions is all the same, then feedback phenomenon will be easy to cause, leads to loudspeaker
Issue ear-piercing whistle.
Currently, on the market only all referring to silicon miaow, all referring to silicon miaow have high sensitivity, be distorted small and consistency
Good feature, and in practical application, we use the silicon miaow being singly directed toward there are many more occasion needs, and the silicon miaow being singly directed toward is in spirit
Effect is poor in terms of sensitivity, distortion and consistency.
Summary of the invention
In view of the above technical problems, the present invention provides one kind both to have maintained all referring to the distinctive high sensitivity of silicon miaow, mistake
The good characteristic of very small and consistency, while the silicon miaow of single adjustable directivity for being directed toward pickup demand is met again.
In order to solve the above technical problem, the present invention provides concrete scheme it is as follows: a kind of silicon miaow of adjustable directivity, packet
Sound headstock upper cover and sound headstock lower cover are included, PCBA board, the sound headstock are equipped between the sound headstock upper cover and sound headstock lower cover
Adjustable sound paper is equipped in lower cap body, the upper surface of the PCBA board is equipped with upper microphone, and the lower surface of PCBA board is equipped with lower microphone.
Preferably, the sound headstock upper cover and sound headstock lower cover are equipped with pickup hole, pick up convenient for upper microphone and lower microphone
External sound source.
Preferably, it is connected through a screw thread between the sound headstock upper cover and sound headstock lower cover, is not necessarily to other mate groups
Dress improves packaging efficiency, and easy to disassemble.
Preferably, the PCBA board is equipped with pickup hole, picks up external sound source convenient for upper microphone and lower microphone.
Preferably, the PCBA board is equipped with the conversion circuit that connect respectively with upper microphone and lower microphone, by upper microphone with
It is exported after the source of sound comprehensive magnification that lower microphone is picked up, obtains adjustable directivity silicon miaow.
Compared with prior art, the beneficial effects of the present invention are: upper microphone of the invention and lower microphone can pick up simultaneously
External sound source is taken, postpones the time that external sound source reaches lower microphone by controlling the density of adjustable sound paper, it will using PCBA board
It exports, has both been maintained all referring to the distinctive high sensitivity of silicon miaow, distortion after the source of sound comprehensive magnification that upper microphone and lower microphone are picked up
The good characteristic of small and consistency, while the pickup demand being singly directed toward is met again.
Detailed description of the invention
Fig. 1 and Fig. 2 is overall structure diagram of the invention；
Fig. 3 is overall structure of the explosion figure of the invention；
Fig. 4 and Fig. 5 is the structural schematic diagram of PCBA board；
Fig. 6 is the figure that makes a practical application of a principle；
Fig. 7 is physical circuit connection figure in PCBA board；
Wherein, 1 is sound headstock upper cover；2 be sound headstock lower cover；3 be PCBA board；31 be upper microphone；32 be lower microphone；4 be tuning
Paper；5 be pickup hole.
Specific embodiment
For the technical solution that the present invention will be described in detail, below in conjunction with the attached drawing of the embodiment of the present invention, to of the invention real
The technical solution for applying example carries out clear, complete description.Obviously, described embodiment is a part of the embodiments of the present invention,
Instead of all the embodiments.Based on described the embodiment of the present invention, those of ordinary skill in the art are without creativeness
Every other embodiment obtained, shall fall within the protection scope of the present invention under the premise of labour.
Fig. 1-Fig. 6 is please referred to, a kind of silicon miaow of adjustable directivity, including sound headstock upper cover and sound head are present embodiments provided
Seat lower cover is equipped with PCBA board, is equipped with adjustable sound paper, PCBA under sound headstock in cap body between sound headstock upper cover and sound headstock lower cover
The upper surface of plate is equipped with upper microphone, and the lower surface of PCBA board is equipped with lower microphone, and Fig. 1 and Fig. 2 are the whole knot of silicon miaow different directions
Structure schematic diagram, Fig. 1 are top-direction schematic diagram, and Fig. 2 is bottom direction schematic diagram；Fig. 4 and Fig. 5 is the knot of PCBA board different directions
Structure schematic diagram, Fig. 3 are upper surface direction schematic diagram, and Fig. 4 is lower surface direction schematic diagram.
Wherein, it is equipped with pickup hole in sound headstock upper cover, sound headstock lower cover and PCBA board, is picked up convenient for upper microphone and lower microphone
External sound source is taken, is connected through a screw thread between sound headstock upper cover and sound headstock lower cover, is assembled without other mates, raising group
Efficiency is filled, and easy to disassemble.
In the present embodiment, ante-chamber is formed between PCBA board and sound headstock upper cover, is formed between PCBA board and sound headstock lower cover
Back cavity is equipped with upper microphone in the upper surface of PCBA board, and lower surface is equipped with lower microphone, and upper microphone and lower microphone can pick up outer simultaneously
Portion's source of sound, but the adjustable sound paper under sound headstock in cap body can postpone the time that external sound source reaches lower microphone, select if delay is short
Thin adjustable sound paper is selected, it is on the contrary then anti-, it is offset using the time difference of front and back chamber, obtains adjustable directivity silicon miaow, such as Fig. 6 institute
Show, be a schematic illustration in practical application, upper microphone and lower microphone are picked up external sound source, exported after PCBA board comprehensive
Amplified source of sound is closed, legend as shown in the figure is only part output legend.
PCBA board is equipped with the conversion circuit connecting respectively with upper microphone and lower microphone, and upper microphone and lower microphone are picked up
It is exported after source of sound comprehensive magnification, obtains adjustable directivity silicon miaow, as shown in fig. 7, the conversion circuit includes operational amplifier U2-C
With U2-B, the resistance R11 being connect with upper microphone, capacitor C16 and resistance R13 and resistance R12, R14 for being connect with lower microphone and
Capacitor C15, resistance R13 are parallel with capacitor C20, are grounded after resistance R13 is in parallel with capacitor C20, the other end of capacitor C20 is also connected with
There is resistance R16, the other end of resistance R16 connects power supply, the other end ground connection of resistance R11, and capacitor C16 is connected with resistance R10, electricity
The negative input of R10 connection operational amplifier U2-B is hindered, the negative input of operational amplifier U2-B is also connected with resistance R8
With capacitor C14, resistance R8 and capacitor C14 it is in parallel after connect the output end of operational amplifier U2-B, operational amplifier U2-B's is defeated
Outlet is connected with capacitor C18, exports amplified source of sound；Resistance R12 is parallel with capacitor C19, and resistance R12 is in parallel with capacitor C19
After be grounded, the other end of capacitor C19 is also connected with resistance R15, and the other end of R15 connects power supply, another termination of resistance R12
Ground, capacitor C15 are connected with resistance R9, the negative input of resistance R9 connection operational amplifier U2-B；Operational amplifier U2-B's
Electrode input end is connected with capacitor C24, and capacitor C24 is parallel with capacitor C23 and resistance R21, and resistance R21 is in series with resistance R20, electricity
It is parallel with capacitor C22 and capacitor C21 after resistance R21 and resistance R20 series connection, the common end after parallel connection is connected to operational amplifier
The power end and ground terminal of U2-C, the power end of operational amplifier U2-C are connected with resistance R19, resistance R19 connection power supply.
Embodiments of the present invention are explained in detail above in conjunction with attached drawing, but the present invention is not limited to above-mentioned implementations
Mode within the knowledge of a person skilled in the art can also be without departing from the purpose of the present invention
Various changes can be made.
Claims (5)
1. a kind of silicon miaow of adjustable directivity, it is characterised in that: including sound headstock upper cover (1) and sound headstock lower cover (2), the sound
PCBA board (3) are equipped between headstock upper cover (1) and sound headstock lower cover (2), adjustable sound paper is equipped in sound headstock lower cover (2) lid
(4), the upper surface of the PCBA board (3) is equipped with upper microphone (31), and the lower surface of PCBA board (3) is equipped with lower microphone (32).
2. the silicon miaow of adjustable directivity according to claim 1, it is characterised in that: the sound headstock upper cover (1) and sound head
Seat lower cover (2) is equipped with pickup hole (5).
3. the silicon miaow of adjustable directivity according to claim 1, it is characterised in that: the sound headstock upper cover (1) and sound head
It is connected through a screw thread between seat lower cover (2).
4. the silicon miaow of adjustable directivity according to claim 1, it is characterised in that: the PCBA board (3) is equipped with pickup
Hole (5).
5. the silicon miaow of adjustable directivity according to claim 1, it is characterised in that: the PCBA board (3) is equipped with difference
The conversion circuit being connect with upper microphone (31) and lower microphone (32).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811139971.9A CN109151691B (en) | 2018-09-28 | 2018-09-28 | Silicon microphone with adjustable directivity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811139971.9A CN109151691B (en) | 2018-09-28 | 2018-09-28 | Silicon microphone with adjustable directivity |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109151691A true CN109151691A (en) | 2019-01-04 |
| CN109151691B CN109151691B (en) | 2023-11-03 |
Family
ID=64813285
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811139971.9A Active CN109151691B (en) | 2018-09-28 | 2018-09-28 | Silicon microphone with adjustable directivity |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109151691B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114501283A (en) * | 2022-04-15 | 2022-05-13 | 南京天悦电子科技有限公司 | Low-complexity double-microphone directional sound pickup method for digital hearing aid |
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| US7881486B1 (en) * | 1996-12-31 | 2011-02-01 | Etymotic Research, Inc. | Directional microphone assembly |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN109151691B (en) | 2023-11-03 |
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