CN208590109U - A kind of public address system and audio player of integrated back cavity pressure perception - Google Patents
A kind of public address system and audio player of integrated back cavity pressure perception Download PDFInfo
- Publication number
- CN208590109U CN208590109U CN201820259069.XU CN201820259069U CN208590109U CN 208590109 U CN208590109 U CN 208590109U CN 201820259069 U CN201820259069 U CN 201820259069U CN 208590109 U CN208590109 U CN 208590109U
- Authority
- CN
- China
- Prior art keywords
- vibrating diaphragm
- public address
- address system
- equivalent
- cavity pressure
- 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.)
- Withdrawn - After Issue
Links
- 230000008447 perception Effects 0.000 title claims abstract description 30
- 238000006073 displacement reaction Methods 0.000 claims abstract description 16
- 230000005611 electricity Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 3
- 239000000428 dust Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
Landscapes
- Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
Abstract
The utility model relates to Audiotechnica field more particularly to a kind of public address systems and audio player of integrated back cavity pressure perception.A kind of public address system of integrated back cavity pressure perception, comprising: speaker body, speaker body include vibrating diaphragm, the voice coil connecting with vibrating diaphragm, back chamber, and voice coil connects a driving unit, carry on the back an intracavitary setting at least microphone, the internal pressure of microphone perception back chamber；One computing unit, the displacement according to internal pressure estimation vibrating diaphragm；One processing unit determines that the displacement of vibrating diaphragm is compared with reference bit shifting, when determining to be more than given threshold, generates a precompensated signal to driving unit.The utility model is perceived the internal pressure of back chamber by microphone, estimates vibrating diaphragm offset by internal pressure by the way that microphone is arranged in back chamber; it is pre-compensated for according to vibrating diaphragm offset accurate judgement loudspeaker distortions situation; distortion can be reduced, protects loudspeaker, it is ensured that the performance of public address system.
Description
Technical field
The utility model relates to Audiotechnica field more particularly to a kind of public address systems.
Background technique
Loudspeaker is the electro-acoustic transducer device for converting electrical signals to voice signal, is the main component of public address system, mesh
The preceding loudspeaker used is mostly dynamic speaker, when voice coil passes to alternating current, will receive magnetic field to voice coil
Active force, this power can be such that voice coil moves up and down and then drive diaphragm oscillations sounding.The acoustical behavior of loudspeaker not only with loudspeaking
Structure, material, the technique of device are related, also related to the control of loudspeaker, however, having no in real time for the control of loudspeaker at present
Effective measures affect the performance of public address system.
Summary of the invention
In order to solve the above-mentioned technical problem, the utility model provides a kind of public address system of integrated back cavity pressure perception,
Concrete scheme is as follows:
A kind of public address system of integrated back cavity pressure perception, wherein include:
Speaker body, the speaker body include vibrating diaphragm, the voice coil connecting with the vibrating diaphragm, back chamber, the voice coil
A driving unit, the intracavitary setting at least microphone of back are connected, the microphone perceives the internal pressure of the back chamber；
One computing unit estimates the displacement of the vibrating diaphragm according to the internal pressure；
One processing unit determines that the displacement of the vibrating diaphragm is compared with reference bit shifting, when determining to be more than given threshold,
A precompensated signal is generated to the driving unit.
The public address system of the integrated back cavity pressure perception of the utility model, the displacement of the internal pressure and the vibrating diaphragm have
There is following relationship:
P (s)=X (s) * S/Ca, wherein
P (s) is the Laplace transform of the internal pressure of the back chamber；
X (s) is the Laplace transform of the equivalent displacement of the vibrating diaphragm；
S is Laplce's independent variable；
S is vibrating diaphragm equivalent area；
Ca is the mechanical compliance for carrying on the back chamber.
The public address system of the integrated back cavity pressure perception of the utility model, the equivalent circuit of the speaker body include just
Grade circuit, the primary circuit include the power Fcoil that coil generates, coil and vibrating diaphragm speed v present in circuit, loudspeaker matter
Measure the equivalent inductance of Mms, the equivalent resistance of loudspeaker mechanical resistance Rms, the equivalent capacity of loudspeaker mechanical compliance Cms；
Converter primary equivalent force F '=pS, F ' are the primary equivalent power of converter, and p is the internal pressure for carrying on the back chamber, and S is vibration
Film equivalent area.
The public address system of the integrated back cavity pressure perception of the utility model, the equivalent circuit of the speaker body further include
Secondary loop, includes the equivalent capacity of back chamber mechanical compliance Ca in the secondary loop, and secondary body speed U=vS, U are secondary body speed
Degree, v are voice coil and vibrating diaphragm speed, and S is vibrating diaphragm equivalent area, and the ratio between the primary circuit and secondary loop is S:1.
The public address system of the integrated back cavity pressure perception of the utility model, the speaker body includes conducting magnetic column, described
Setting magnet and the magnetic conductive board above magnet on the outside of the stylolitic part of conducting magnetic column, the voice coil be set to the magnetic conductive board with
The gap of the stylolitic part.
The public address system of the integrated back cavity pressure perception of the utility model, is arranged centring disk on the magnetic conductive board, described
Centring disk is wavy annular folded plate.
The public address system of the integrated back cavity pressure perception of the utility model, the speaker body includes bracket, the vibration
Film is set to the top of the bracket.
The public address system of the integrated back cavity pressure perception of the utility model, the vibrating diaphragm are the vibrating diaphragm of cone, the vibration
The top of film is equipped with the side turned up, and the side turned up is connect with the bracket by clamp device.
The public address system of the integrated back cavity pressure perception of the utility model, the computing unit and the processing unit are integrated
In same chip.
The utility model also provides a kind of audio player, the public address system perceived including above-mentioned integrated back cavity pressure.
The utility model has the advantages that by the way that microphone is arranged in carrying on the back chamber, the internal pressure of chamber is carried on the back by microphone perception for the utility model,
Vibrating diaphragm offset is estimated by internal pressure, is pre-compensated for according to vibrating diaphragm offset accurate judgement loudspeaker distortions situation, energy
It is enough to reduce distortion, protect loudspeaker, it is ensured that the performance of public address system.
Detailed description of the invention
Fig. 1 is the principles of the present invention block diagram；
Fig. 2 is the mechanical model schematic diagram of the utility model；
Fig. 3 is the schematic equivalent circuit of the utility model；
Fig. 4 is that the back chamber acoustic pressure of the utility model and vibrating diaphragm are displaced proportional figure.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are in the premise for not making creative work
Under every other embodiment obtained, fall within the protection scope of the utility model.
It should be noted that in the absence of conflict, the feature in the embodiments of the present invention and embodiment can
To be combined with each other.
The utility model is described in further detail in the following with reference to the drawings and specific embodiments, but not as the utility model
It limits.
Referring to Fig.1, a kind of public address system of integrated back cavity pressure perception, comprising:
Speaker body 10, voice coil, the back chamber that speaker body 10 includes vibrating diaphragm, connect with vibrating diaphragm, voice coil connection one are driven
Moving cell 14 carries on the back an intracavitary setting at least microphone 11, the internal pressure of the perception back chamber of microphone 11；
One computing unit 12, the displacement according to internal pressure estimation vibrating diaphragm；
One processing unit 13 determines that the displacement of vibrating diaphragm is compared with reference bit shifting, when determining to be more than given threshold, produces
A raw precompensated signal is to driving unit.
The utility model perceives the internal pressure of the back chamber, passes through internal pressure by the way that microphone is arranged in back chamber
It estimates vibrating diaphragm offset, is pre-compensated for according to vibrating diaphragm offset accurate judgement loudspeaker distortions situation, distortion can be reduced, protect
Protect loudspeaker, it is ensured that the performance of public address system.
The public address system of the integrated back cavity pressure perception of the utility model, referring to Fig. 2, speaker body 10 may include branch
Frame 101, vibrating diaphragm 102 are set to the top of bracket 101.Speaker body includes inverted T shaped conducting magnetic column 103, inverted T shaped conducting magnetic column 103
Stylolitic part on the outside of the setting magnet 104 and magnetic conductive board 105 above magnet 104.Voice coil 106 is set to magnetic conductive board 105
With the gap of stylolitic part.Centring disk 107 is set on magnetic conductive board 105, and centring disk 107 is wavy folded plate.
The public address system of the integrated back cavity pressure perception of the utility model, speaker body 10 includes dust cover 108, dust-proof
Cover 108 is located at the top of voice coil 106.The vibrating diaphragm 102 of the utility model is the vibrating diaphragm of cone, and the top of vibrating diaphragm 102 is equipped with outer
The side turned over, the side turned up are connect with bracket 101 by clamp device.
Vibrating diaphragm 102 in above-mentioned speaker body, voice coil 106 and to guarantee voice coil 106 in magnetic gap in correct position
The centring disk 107 set constitutes vibrational system, and inverted T shaped conducting magnetic column 103, magnet 104, magnetic conductive board 105 constitute magnetic circuit system, bracket
101, dust cover 108 etc. belongs to auxiliary member.
The speaker body of the utility model is not limited to above structure.
Analysis of Equivalent Circuit as shown in connection with fig. 3: the equivalent circuit of above-mentioned speaker body includes primary circuit, described
Primary circuit includes the power Fcoil that coil generates, coil and vibrating diaphragm speed v present in circuit, loudspeaker mechanical parameter such as matter
Measure the equivalent inductance of Mms, the equivalent resistance of loudspeaker mechanical resistance Rms, the equivalent capacity of loudspeaker mechanical compliance Cms；Converter primary etc.
Effect F '=pS, F ' are the primary equivalent power of converter, and p is the internal pressure for carrying on the back chamber, and S is vibrating diaphragm equivalent area.Loudspeaker master
The equivalent circuit of body further includes secondary loop, includes the equivalent capacity of back chamber mechanical compliance Ca, secondary body speed U in the secondary loop
=vS, U are secondary body speed, and v is voice coil and vibrating diaphragm speed, and S is vibrating diaphragm equivalent area, the primary circuit and secondary loop it
Between ratio be S:1.
Assuming that having when converter transmitting is lossless:
F ' * v=p*U, wherein F ' is the primary equivalent power of converter；V is voice coil and vibrating diaphragm speed；
P is back chamber pressure；U is secondary body speed；
Secondary pressure carries on the back chamber pressure p (s)=U (s) * (1/sCa)=v (s) * S/sCa, wherein
P (s) is the Laplace transform for carrying on the back chamber pressure；
U (s) is the Laplace transform of secondary body speed；
S is Laplce's independent variable；
Ca is the mechanical compliance for carrying on the back chamber；
V (s) is the Laplace transform of voice coil and vibrating diaphragm speed；
S is vibrating diaphragm equivalent area；
It is the equivalent displacement of vibrating diaphragm by v (s)=s*X (s), X (s)；
Above formula can turn to p (s)=X (s) * S/Ca, i.e., when vibrating diaphragm equivalent area and back cavity structure are fixed, back chamber acoustic pressure and
Vibrating diaphragm displacement is directly proportional, and has above-mentioned relation.Referring to Fig. 4, experimental data further proves above-mentioned relation.
The utility model, which passes through, is set to the intracavitary microphone senses back chamber pressure of sealing back, is based on according to the back chamber pressure
Above-mentioned relation estimates vibrating diaphragm displacement, based on integrated back cavity pressure perception and simplifies problem, technical solutions of the utility model realize letter
It is single, and can effectively improve the performance of public address system acoustics, above-mentioned reference displacement, given threshold can be selected according to the actual situation
It selects and is arranged, and be stored in a memory.
The microphone of the utility model can be set more than one, be set in the back chamber, to guarantee the accurate of test
It spends and is accurately pre-compensated for.Position and microphone the distance between of the microphone of the utility model in back chamber can roots
It is adjusted according to actual needs and test result.
Above-mentioned microphone uses digital microphone, it is preferred to use MEMS condenser microphone.
Above-mentioned precompensated signal can be an increment signal or decrement signals, to change the size of current of driving voice coil.
Above-mentioned precompensated signal can also be gain of the gain-adjusted signal to change driving unit.Those skilled in the art can be according to
The prior art is based on according to the purpose of adjustment to be selected.Above-mentioned processing unit 13, computing unit 12 can integrate in same core
Piece, as integrated multiple functions digital signal processing chip in.
The utility model also provides a kind of audio player, the public address system perceived including above-mentioned integrated back cavity pressure.
The audio player can be intelligent sound box, the audio broadcasting part of intelligent interactive robot or other intelligent appliances.
The foregoing is merely the utility model preferred embodiment, be not intended to limit the embodiments of the present invention and
Protection scope should can appreciate that all in the utility model specification and diagram to those skilled in the art
Hold made equivalent replacement and obviously change obtained scheme, the protection model of the utility model should all be included in
In enclosing.
Claims (10)
1. a kind of public address system of integrated back cavity pressure perception characterized by comprising
Speaker body, the speaker body include vibrating diaphragm, the voice coil connecting with the vibrating diaphragm, back chamber, the voice coil connection
One driving unit, the intracavitary setting at least microphone of back, the microphone perceive the internal pressure of the back chamber；
One computing unit estimates the displacement of the vibrating diaphragm according to the internal pressure；
One processing unit determines that the displacement of the vibrating diaphragm is compared with reference bit shifting, when determining to be more than given threshold, generates
One precompensated signal gives the driving unit.
2. the public address system of integrated back cavity pressure perception according to claim 1, which is characterized in that the internal pressure with
The displacement of the vibrating diaphragm has following relationship:
P (s)=X (s) * S/Ca, wherein
P (s) is the Laplace transform of the internal pressure of the back chamber；
X (s) is the Laplace transform of the equivalent displacement of the vibrating diaphragm；
S is Laplce's independent variable；
S is vibrating diaphragm equivalent area；
Ca is the mechanical compliance for carrying on the back chamber.
3. the public address system of integrated back cavity pressure perception according to claim 1, which is characterized in that the speaker body
Equivalent circuit include primary circuit, the primary circuit includes the power Fcoil that coil generates, coil and vibration present in circuit
Film speed v, the equivalent inductance of loudspeaker quality Mms, the equivalent resistance of loudspeaker mechanical resistance Rms, the equivalent electricity of loudspeaker mechanical compliance Cms
Hold；
Converter primary equivalent force F '=pS, F ' are the primary equivalent power of converter, and p is the internal pressure for carrying on the back chamber, and S is vibrating diaphragm etc.
Imitate area.
4. the public address system of integrated back cavity pressure perception according to claim 3, which is characterized in that the speaker body
Equivalent circuit further include secondary loop, in the secondary loop include back chamber mechanical compliance Ca equivalent capacity, secondary body speed U=
VS, U are secondary body speed, and v is voice coil and vibrating diaphragm speed, and S is vibrating diaphragm equivalent area, between the primary circuit and secondary loop
Ratio be S:1.
5. the public address system of integrated back cavity pressure perception according to claim 1, which is characterized in that the speaker body
Including conducting magnetic column, setting magnet and the magnetic conductive board above magnet, the voice coil are set on the outside of the stylolitic part of the conducting magnetic column
It is placed in the gap of the magnetic conductive board Yu the stylolitic part.
6. the public address system of integrated back cavity pressure perception according to claim 5, which is characterized in that set on the magnetic conductive board
Centring disk is set, the centring disk is wavy annular folded plate.
7. the public address system of integrated back cavity pressure perception according to claim 1, which is characterized in that the speaker body
Including bracket, the vibrating diaphragm is set to the top of the bracket.
8. the public address system of integrated back cavity pressure perception according to claim 7, which is characterized in that the vibrating diaphragm is circular cone
The vibrating diaphragm of shape, the top of the vibrating diaphragm are equipped with the side turned up, and the side turned up is connect with the bracket by clamp device.
9. the public address system of integrated back cavity pressure perception according to claim 1, which is characterized in that the computing unit with
The processing unit is integrated in same chip.
10. a kind of audio player, which is characterized in that including integrated back cavity pressure sense described in any one of claim 1-9
The public address system known.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820259069.XU CN208590109U (en) | 2018-02-14 | 2018-02-14 | A kind of public address system and audio player of integrated back cavity pressure perception |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820259069.XU CN208590109U (en) | 2018-02-14 | 2018-02-14 | A kind of public address system and audio player of integrated back cavity pressure perception |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208590109U true CN208590109U (en) | 2019-03-08 |
Family
ID=65532261
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820259069.XU Withdrawn - After Issue CN208590109U (en) | 2018-02-14 | 2018-02-14 | A kind of public address system and audio player of integrated back cavity pressure perception |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208590109U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108282725A (en) * | 2018-02-14 | 2018-07-13 | 钰太芯微电子科技（上海）有限公司 | A kind of public address system and audio player of integrated back of the body cavity pressure perception |
-
2018
- 2018-02-14 CN CN201820259069.XU patent/CN208590109U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108282725A (en) * | 2018-02-14 | 2018-07-13 | 钰太芯微电子科技（上海）有限公司 | A kind of public address system and audio player of integrated back of the body cavity pressure perception |
| CN108282725B (en) * | 2018-02-14 | 2024-01-16 | 钰太芯微电子科技（上海）有限公司 | Integrated back cavity pressure sensing sound amplifying system and audio player |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105704624B (en) | The method for controlling the diaphragm offset of dynamic loudspeaker | |
| US9307321B1 (en) | Speaker distortion reduction | |
| CN108282725A (en) | A kind of public address system and audio player of integrated back of the body cavity pressure perception | |
| CN203104578U (en) | A mobile communication device and a sounding device thereof | |
| CN106303779A (en) | Earphone | |
| CN211128162U (en) | Loudspeaker | |
| US20150023506A1 (en) | Sound Generator | |
| US7447322B2 (en) | Speaker having a transparent panel | |
| CN203225876U (en) | Loudspeaker module | |
| CN208590109U (en) | A kind of public address system and audio player of integrated back cavity pressure perception | |
| US10701477B2 (en) | Loudspeaker, acoustic waveguide, and method | |
| CN209419838U (en) | A kind of speaker and its coaxial horn | |
| WO2017197742A1 (en) | Method and device for audio processing | |
| CN203896502U (en) | Piezoelectric loudspeaker | |
| WO2006078247A1 (en) | Speaker having a transparent panel | |
| CN113507668B (en) | Variable-bandwidth intelligent control method, audio equipment and readable storage medium | |
| CN209250879U (en) | The compound electroacoustic transducer of moving-coil electrostatic | |
| CN207911001U (en) | A kind of loud speaker | |
| CN102036153B (en) | Double-film type piezoelectric ceramic loudspeaker | |
| CN201986142U (en) | Double-film piezoelectric ceramic loudspeaker | |
| JP2022529364A (en) | Terminal equipment | |
| CN219738036U (en) | Square dance sound transmission control equipment | |
| RU2755807C1 (en) | Audio system with a natural sound effect of the sound field type | |
| CN217445520U (en) | Multi-unit flat horn | |
| CN211656366U (en) | High-sensitivity loudspeaker |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20190308 Effective date of abandoning: 20240116 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20190308 Effective date of abandoning: 20240116 |