CN109511068A - A kind of carbon nanotube loudspeaker based on optoacoustic effect - Google Patents
A kind of carbon nanotube loudspeaker based on optoacoustic effect Download PDFInfo
- Publication number
- CN109511068A CN109511068A CN201811495253.5A CN201811495253A CN109511068A CN 109511068 A CN109511068 A CN 109511068A CN 201811495253 A CN201811495253 A CN 201811495253A CN 109511068 A CN109511068 A CN 109511068A
- Authority
- CN
- China
- Prior art keywords
- loudspeaker
- carbon nanotube
- signal
- audio
- output
- 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.)
- Pending
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R23/00—Transducers other than those covered by groups H04R9/00 - H04R21/00
- H04R23/008—Transducers other than those covered by groups H04R9/00 - H04R21/00 using optical signals for detecting or generating sound
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R3/00—Circuits for transducers, loudspeakers or microphones
Abstract
The carbon nanotube loudspeaker based on optoacoustic effect that the invention discloses a kind of, including audio processing modules, signal driver module and carbon nanotube loudspeaker；The input terminal of audio processing modules is for receiving the first audio signal, and output end is for exporting electric signal；The input terminal of signal driver module is used for output optical signal for receiving electric signal, output end；The input terminal of carbon nanotube loudspeaker is for receiving optical signal, and output end is for exporting the second audio signal.Wherein carbon nanotube loudspeaker is carbon nano pipe array.The present invention gets rid of the constraint of traditional wire pair loudspeaker, signal is transmitted using visible light, the carbon nano pipe array of use has special construction, good Frequency Response can be obtained, the audio signal acoustic pressure of output is stablized, simultaneously the regulation to sound can also be realized by the volume of the strong and weak audio signal for changing output of control LED light.
Description
Technical field
The invention belongs to loudspeaker fields, more particularly, to a kind of carbon nanotube loudspeaker based on optoacoustic effect.
Background technique
Loudspeaker is to be related to the device of electric signal and acoustical signal mutually converted, with the most commonly used cone used now
For shape loudspeaker, it is usually to utilize magnetic field force, by making voice coil vibrations by alternating current in voice coil, causes to be connected to sound
The vibration of the cone of circle, to generate sound.Wherein, a smooth frequency response curve is one of measurement speaker effect important
Index.So-called smooth frequency response curve refers to that signal of the loudspeaker reply in the band limits of heard sound has phase
Same amplification factor.In the cone loudspeaker of the prior art, the complicated electricity based on inside loudspeakers, power, the structure of sound lead to
It often can be using the resonant frequency of loudspeaker as the lower line frequency of a sound；But when frequency is got higher, due to the paper of loudspeaker
It basin and converts and can resonate, cone can show more complicated vibration mode, so that sound frequency strongly reduces.To nothing
The amplification that method is all consistent in very wide frequency range, it is difficult to obtain consistent frequency response curve.Certainly, there are also very much
Other kinds of loudspeaker, such as horn loudspeaker, it is to use horn to sound wave caused by ambient radiation vibrating diaphragm；There are also flat
Face vibrating membrane loudspeaker, it is using planar vibrating diaphragm.But these are also all to belong to mechanical loudspeaker scope, they
Frequency Response also all also all haves the defects that on Hz-KHz and Frequency Response curve.
Summary of the invention
In view of the drawbacks of the prior art, it is an object of the invention to by visible light rather than conventional current come transmit audio letter
Breath, it is intended to solve the problems, such as that the existing unsmooth sound of loudspeaker frequency response curve is volatile genuine.
To achieve the above object, the present invention provides a kind of carbon nanotube loudspeaker based on optoacoustic effect, including audio
Processing module, signal driver module and carbon nanotube loudspeaker；The input terminal of audio processing modules is for receiving the first audio letter
Number, output end is for exporting electric signal；The input terminal of signal driver module is for receiving electric signal, and output end is for exporting
Optical signal；The input terminal of carbon nanotube loudspeaker is for receiving optical signal, and output end is for exporting the second audio signal.
Preferably, signal driver module is LED drive circuit, including audio frequency power amplifier chip and external LED circuit；Audio function
Chip is put for the first audio signal of different amplitude ranges to be amplified to the voltage range that LED lamp bead can be made to be connected；LED circuit
It is used for transmission optical signal.
Preferably, signal driver module further includes the strong and weak regulation carbon nanotube loudspeaker for controlling LED output optical signal
The size of two audio signal volumes, LED output optical signal is stronger, and the second audio signal volume of carbon nanotube loudspeaker output is got over
Greatly.
Preferably, the quantity of LED lamp bead is 1 or more, and each LED lamp bead is in series or in parallel.
Preferably, in order to improve sound-electric-light-sound transfer efficiency, present invention employs carbon nano pipe arrays, work as illumination
When penetrating on the surface in optoacoustic transition material, optoacoustic transition material can absorb luminous energy, generate heat, cause the change of material volume
Change, thus outside radiative acoustic wave.Carbon nanotube has special pore structure, can convert light into as audible acoustical signal.And
Carbon nano pipe array has the advantages of low heat capacity, highly thermally conductive and high absorptivity, can efficiently convert optical signals to sound,
And has good Frequency Response.The size of carbon nano pipe array is fixed according to the frequency of the output optical signal of signal driver module
System.And carbon nanotube loudspeaker is set at LED lamp bead optically focused, is not directly contacted with LED lamp bead.
Compared with prior art, the contemplated technical solution of the present invention can obtain it is following the utility model has the advantages that
1, the present invention gets rid of the constraint of traditional wire pair loudspeaker, signal is transmitted using visible light, and compared to existing
There is the Baffle Box of Bluetooth of wireless transmission, it is seen that the effect of optical transport is more preferable than electromagnetic wave；
2, special construction possessed by the carbon nano pipe array that the present invention uses, can obtain good Frequency Response, defeated
Audio signal acoustic pressure out is stablized；
3, the present invention can be realized by the volume of the strong and weak audio signal for changing output of control LED light to sound
The regulation of sound.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of carbon nanotube loudspeaker based on optoacoustic effect provided by the invention；
Fig. 2 is the structural schematic diagram of the signal driver module of carbon nanotube loudspeaker provided in an embodiment of the present invention；
Fig. 3 is a kind of structural representation of carbon nanotube loudspeaker based on optoacoustic effect provided in an embodiment of the present invention
Figure.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
Fig. 1 is a kind of structural schematic diagram of carbon nanotube loudspeaker based on optoacoustic effect provided by the invention, including
Audio processing modules, signal driver module and carbon nanotube loudspeaker；The input terminal of audio processing modules is for receiving the first sound
Frequency signal, output end is for exporting electric signal；For receiving electric signal, output end is used for the input terminal of signal driver module
Output optical signal；The input terminal of carbon nanotube loudspeaker is for receiving optical signal, and output end is for exporting the second audio signal.
Specifically, the present embodiment converts voice signal to the telecommunications for being input to signal driver module using handset audio line
Number.Signal driver module is LED drive circuit, including audio frequency power amplifier chip and external LED circuit；Audio frequency power amplifier chip is used for will
First audio signal of different amplitude ranges is amplified to the voltage range that LED lamp bead can be made to be connected；LED circuit is used for transmission light letter
Number.Signal driver module further includes strong and weak regulation the second audio signal of the carbon nanotube loudspeaker sound for controlling LED output optical signal
The size of amount, LED output optical signal is stronger, and the second audio signal volume of carbon nanotube loudspeaker output is bigger.Such as Fig. 2 institute
Showing, the main body of driving circuit is TDA2822 power amplifier chip in the present embodiment, and TDA2822 has circuit simple, and sound quality is good,
The audio signal of different amplitude ranges can be effectively amplified to the voltage model that LED can be made to be connected by the features such as voltage range is wide
It encloses, various audio signals can be accommodated, and fidelity is high, meets the requirement of driving.A TDA2822 drives two in the present embodiment
Concatenated LED can reduce single led power burden, and multiple LED can reach the purpose of multi-party irradiation material.
In specific practical application, the beginning shape that bluetooth module controls entire circuit can also be added in the driving circuit
State, to control the transmission of audio signal.
The present embodiment uses the carbon nano pipe array of 1cm × 1cm × 1000 μm as carbon nanotube loudspeaker, and by carbon
Nano-tube array is set at LED lamp bead optically focused, is not directly contacted with LED lamp bead.LED lamp bead irradiates carbon nano pipe array, passes through
Optoacoustic effect conversion produces sound, that is, realizes the function of loudspeaker, the carbon nanotube based on optoacoustic effect of the present embodiment
Loudspeaker structure is as shown in Figure 3.
As it will be easily appreciated by one skilled in the art that the foregoing is merely illustrative of the preferred embodiments of the present invention, not to
The limitation present invention, any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should all include
Within protection scope of the present invention.
Claims (6)
1. a kind of carbon nanotube loudspeaker based on optoacoustic effect, which is characterized in that driven including audio processing modules, signal
Module and carbon nanotube loudspeaker；
The audio processing modules, input terminal is for receiving the first audio signal, and output end is for exporting electric signal；
The signal driver module, input terminal are used for output optical signal for receiving the electric signal, output end；
The carbon nanotube loudspeaker, input terminal is for receiving the optical signal, and output end is for exporting the second audio letter
Number.
2. carbon nanotube loudspeaker according to claim 1, which is characterized in that the signal driver module is LED drive
Dynamic circuit, including audio frequency power amplifier chip and external LED circuit；
The audio frequency power amplifier chip is used to for the first audio signal of different amplitude ranges to be amplified to the electricity that LED lamp bead can be made to be connected
Press range；
The LED circuit is used for transmission optical signal.
3. carbon nanotube loudspeaker according to claim 1 or 2, which is characterized in that the signal driver module is also wrapped
Include the size of strong and weak regulation the second audio signal volume of carbon nanotube loudspeaker of control LED output optical signal, LED output light letter
Number stronger, the second audio signal volume of carbon nanotube loudspeaker output is bigger.
4. carbon nanotube loudspeaker according to any one of claims 1 to 3, which is characterized in that the number of the LED lamp bead
Amount is 1 or more, and each LED lamp bead is in series or in parallel.
5. carbon nanotube loudspeaker according to claim 1, which is characterized in that the carbon nanotube loudspeaker is received for carbon
Mitron array customizes various sizes of carbon nano pipe array according to the frequency of the output optical signal of the signal driver module.
6. carbon nanotube loudspeaker according to claim 5, which is characterized in that the carbon nanotube loudspeaker is set to
At the LED lamp bead optically focused, it is not directly contacted with LED lamp bead.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811495253.5A CN109511068A (en) | 2018-12-07 | 2018-12-07 | A kind of carbon nanotube loudspeaker based on optoacoustic effect |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811495253.5A CN109511068A (en) | 2018-12-07 | 2018-12-07 | A kind of carbon nanotube loudspeaker based on optoacoustic effect |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109511068A true CN109511068A (en) | 2019-03-22 |
Family
ID=65751851
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811495253.5A Pending CN109511068A (en) | 2018-12-07 | 2018-12-07 | A kind of carbon nanotube loudspeaker based on optoacoustic effect |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109511068A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2597656A (en) * | 2020-07-21 | 2022-02-09 | Nokia Technologies Oy | Apparatus, methods and computer programs for locating mobile devices |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070081681A1 (en) * | 2005-10-03 | 2007-04-12 | Xun Yu | Thin film transparent acoustic transducer |
| CN101605292A (en) * | 2008-06-13 | 2009-12-16 | 清华大学 | Sound-producing device and sounding component |
| CN101707504A (en) * | 2009-10-28 | 2010-05-12 | 天津大学 | Optical fiber intercome device |
| CN101841759A (en) * | 2010-05-10 | 2010-09-22 | 北京富纳特创新科技有限公司 | Thermo-acoustic device |
-
2018
- 2018-12-07 CN CN201811495253.5A patent/CN109511068A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070081681A1 (en) * | 2005-10-03 | 2007-04-12 | Xun Yu | Thin film transparent acoustic transducer |
| CN101605292A (en) * | 2008-06-13 | 2009-12-16 | 清华大学 | Sound-producing device and sounding component |
| CN101707504A (en) * | 2009-10-28 | 2010-05-12 | 天津大学 | Optical fiber intercome device |
| CN101841759A (en) * | 2010-05-10 | 2010-09-22 | 北京富纳特创新科技有限公司 | Thermo-acoustic device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2597656A (en) * | 2020-07-21 | 2022-02-09 | Nokia Technologies Oy | Apparatus, methods and computer programs for locating mobile devices |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US8208675B2 (en) | Loudspeaker | |
| JP4555384B2 (en) | Thermoacoustic device | |
| US8208661B2 (en) | Headphone | |
| JP4555387B2 (en) | Thermoacoustic device | |
| US10129657B2 (en) | Unidirectional loudspeaker enclosure | |
| CN102820804A (en) | Power generation device by noise | |
| CN204836544U (en) | Directional vocal audio amplifier circuit structure | |
| CN102281488A (en) | Double-transduction-mode combined coaxial full-range loudspeaker | |
| CN109511068A (en) | A kind of carbon nanotube loudspeaker based on optoacoustic effect | |
| JP5270460B2 (en) | Thermoacoustic device | |
| CN212367505U (en) | Wireless earphone | |
| CN202178868U (en) | Double energy-conversion combination coaxial full-frequency loudspeaker | |
| CN110996235A (en) | Bone conduction speaker for ultrasonic and electroacoustic systems | |
| JP5270459B2 (en) | Sound transmission system | |
| JP5270461B2 (en) | Thermoacoustic device | |
| JP5356992B2 (en) | Thermoacoustic device | |
| CN101754075A (en) | Improved structure of loudspeaker | |
| CN202261758U (en) | Broadcast horn loudspeaker | |
| JP5270466B2 (en) | Thermoacoustic device | |
| CN103024650A (en) | Giant magnetostrictive rare-earth transducer for parametric loudspeaker | |
| CN203313389U (en) | Composite diaphragm horn without cone | |
| CN204442678U (en) | A kind of receiver of easy structure | |
| CN211909150U (en) | Bone conduction speaker for ultrasonic and electroacoustic systems | |
| CN209787380U (en) | circle iron integral type sound production unit and earphone | |
| CN217643704U (en) | PVDF membrane speaker audio amplifier |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190322 |