CN106209259A - A kind of acoustic communication system - Google Patents
A kind of acoustic communication system Download PDFInfo
- Publication number
- CN106209259A CN106209259A CN201510223704.XA CN201510223704A CN106209259A CN 106209259 A CN106209259 A CN 106209259A CN 201510223704 A CN201510223704 A CN 201510223704A CN 106209259 A CN106209259 A CN 106209259A
- Authority
- CN
- China
- Prior art keywords
- signal
- host computer
- circuit
- communication system
- slave computer
- 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
Landscapes
- Transceivers (AREA)
Abstract
The invention discloses a kind of acoustic communication system, described system includes host computer and slave computer, wherein using the mode of acoustic communication to complete the exchange of information between host computer and slave computer, described host computer includes that host computer receives unit, host computer transmitting element and main control unit；Slave computer includes that slave computer receives unit, slave computer transmitting element and single-chip microcomputer, single-chip microcomputer and main control unit as control module encoded command signals or receive command signal and respond, and host computer transmitting element and slave computer are received between unit and be all to be communicated by acoustic signals between slave computer transmitting element and host computer reception unit.The communication system of the present invention uses acoustic communication, more cost-effective and simple to operate than Bluetooth communication.
Description
Technical field
The invention belongs to the communications field, particularly relate to a kind of acoustic communication system.
Background technology
The slave computer developed at present uses bluetooth module to communicate with host computer mostly.On the one hand bluetooth
The high complexity of chip functions increases the product development difficulty of downstream manufacturers, and the research and development that improve product become
This；On the other hand also result in the waste of Bluetooth chip function and cost.Therefore, for shortening grinding of product
The cycle of sending out and saving production cost, the present invention uses acoustic communication mode to substitute Blue-tooth communication method first,
Achieve the data communication of intelligence slave computer and host computer.
From Consumer's Experience, the use process of Blue-tooth communication method is complex, and part user is not
Easily operation and and grasp, cause Consumer's Experience poor；And the acoustic communication mode function list that the present invention uses
One, easy to use, reduce the operation easier that slave computer communicates, better user experience with host computer.Separately
Outward, bluetooth price the most on the market is the highest, causes consumer to be hung back, the big discounting of purchase enthusiasm
Button；The acoustic communication system that the present invention proposes, greatly reduces the cost of production, and easily operated.
Summary of the invention
A kind of acoustic communication system, bag is the invention provides for solving production cost and operation difficulty problem
Include: host computer 1 and slave computer 2；
Wherein, described host computer 1 includes main control unit 8, for encoding command signal；Upper
Machine transmitting element 7, for receiving the command signal after unit 3 sends coding to slave computer；Host computer connects
Receive unit 6, for receiving the command signal that slave computer transmitting element 4 sends；Described slave computer 2 includes
Single-chip microcomputer 5, processes and to processing for slave computer receives the command signal that receives of unit 3
Signal makes feedback signal, and to host computer, feedback signal is received unit 6 by slave computer transmitting element 4
Send；Slave computer receives unit 3, concurrent for receiving the command signal of host computer transmitting element 7 transmission
Give single-chip microcomputer 5；Slave computer transmitting element 4, for sending the command signal of single-chip microcomputer 5；Described bottom
Machine transmitting element 4 includes speaker；The communication frequency of described command signal is less than the one of system sampling frequency
Half.
Further, in the present invention, described slave computer receives unit 3 and includes: acoustic receiver circuit 301,
For receiving the acoustic signals that host computer transmitting element 7 sends, and acoustic signals is converted into the signal of telecommunication；
Pre-filter circuit 302, is connected 301, and sound wave circuit connects 301 electricity received with sound wave circuit
Signal is filtered processing；Signal amplification circuit 303, is connected with pre-filter circuit 302, and to warp
Cross the filtered signal of telecommunication of pre-filter circuit 302 to amplify；And secondary filter circuit 304, and signal
Amplifying circuit 303 connects, and to the signal of telecommunication secondary filtering after signal amplification circuit 303 amplifies.
Further, in the present invention, described acoustic receiver circuit 301 includes electret special chip, institute
State electret special chip to include:
BIAS pin, connects with one end of a resistance, and the other end of resistance connects the positive pole of miaow head, wherein
Described miaow head is for being converted into the signal of telecommunication by the acoustic signals received；
IN pin, connects with one end of the first electric capacity, one end of the first electric capacity and resistance and the connection of miaow head
Place's series connection；
VCC pin, is connected with one end of the second electric capacity, and the other end of the second electric capacity and the negative pole of miaow head are even
Connect and ground connection；
OUT pin, in parallel with the 3rd electric capacity and the 4th electric capacity.
Further, in the present invention, described electret special chip also includes master control signal pins SHDN,
Wherein said master control signal pins SHDN connects the dc-dc for voltage stabilizing.
Further, in the present invention, described signal amplification circuit 303 includes dual power supply amplifier chip, its
Described in dual power supply amplifier chip for by the signal of telecommunication amplify.
Further, in the present invention, described secondary filter circuit 304 includes amplifier chip, wherein said
Amplifier chip is for signal of telecommunication secondary filtering.
Further, in the present invention, described slave computer receive unit 3 by command signal filter, amplify,
After secondary filter, carry out analog digital conversion through A/D modulus acquisition module 9 and be sent to single-chip microcomputer 5.
Further, in the present invention, the sampling configuration of described A/D modulus acquisition module 9 selects circulation to adopt
Original mold formula, is provided with one or more selector, described A/D in wherein said A/D modulus acquisition module 9
The sampling channel of modulus acquisition module is connected to the input port of these one or more selectores, each described
The output port of selector is connected to any one simulation input I/O mouth of described A/D modulus acquisition module 9.
Further, in the present invention, described host computer transmitting element 7 includes that audio frequency plays subelement.
Further, in the present invention, in described host computer 1 host computer transmitting element 7 send mode according to
Data are filled in message by message format, encode message, then carry out FSK modulation, modulation
To high frequency, and sent to slave computer reception unit 3 by described audio frequency broadcasting subelement.
The method have the advantages that, for acoustic communication, more simply and readily operate than bluetooth communication；
The cost of acoustic communication is well below bluetooth.
Accompanying drawing explanation
Fig. 1 is the flow chart of a kind of acoustic communication system of the embodiment of the present invention；
Fig. 2 is the acoustic receiver flow chart of a kind of acoustic communication system of the embodiment of the present invention；
Fig. 3 is that the slave computer of a kind of acoustic communication system of the embodiment of the present invention receives unit acoustic receiver electricity
The circuit diagram on road；
Fig. 4 is the DC-DC mu balanced circuit figure of a kind of acoustic communication system of the embodiment of the present invention；
Fig. 5 is the signal amplification circuit figure of a kind of acoustic communication system of the embodiment of the present invention；
Fig. 6 is the second order high-pass filtering circuit figure of a kind of acoustic communication system of the embodiment of the present invention；
Fig. 7 is the second-order low-pass filter circuit diagram of a kind of acoustic communication system of the embodiment of the present invention.
Detailed description of the invention
For making the object, technical solutions and advantages of the present invention of greater clarity, below in conjunction with being embodied as
Mode referring to the drawings, the present invention is described in more detail.It should be understood that these describe simply example
Property, and it is not intended to limit the scope of the present invention.Additionally, in the following description, eliminate known knot
Structure and the description of technology, to avoid unnecessarily obscuring idea of the invention.
Audio signal (Audio) is the frequency of regular sound wave with voice, music and audio, width
The information carrier of degree change, it is a kind of continuously varying analog signal.Audio signal has three important ginsengs
Number: signal frequency, signal amplitude A and signal phase, thus it is possible to vary the parameter characteristic of signal realizes sound
Wave communication, corresponding communication mode has frequency shift keying, amplitude shift keying and phase-shift keying (PSK).Three kinds of communication parties
Formula is respectively arranged with quality, needs to be analyzed as the case may be during Project design, and the present invention uses change
The frequency deviation key control mode of audio signal frequency realizes acoustic communication.
Fig. 1 is the flow chart of a kind of acoustic communication system of the embodiment of the present invention.
As it is shown in figure 1, described acoustic communication system includes host computer 1 and 2 two modules of slave computer, its
Middle host computer 1 includes that host computer transmitting element 7, host computer receive unit 6 and 8 three lists of main control unit
Unit, data are filled in message with message form, compile message by main control unit 8 by command signal
Code, then carries out FSK modulation, and modulation to high frequency, at the audio horn by host computer transmitting element 7
The slave computer being sent to slave computer receives unit 3；Host computer receives unit 6 and is used for receiving in slave computer 2
Slave computer transmitting element 4 sends the command signal of coming, and the command signal received is processed and sent
To main control unit 8.
Slave computer 2 includes that slave computer receives unit 3, slave computer transmitting element 4 and single-chip microcomputer 5, wherein under
Position machine receives unit 3 and includes acoustic receiver circuit 301, for receiving what host computer transmitting element 7 sent
Acoustic signals, and acoustic signals is converted into the signal of telecommunication；Pre-filter circuit 302, with sound wave circuit even
Connect 301, and the signals of telecommunication receiving sound wave circuit connection 301 are filtered processing；Signal amplifies electricity
Road 303, is connected with pre-filter circuit 302, and to through the filtered electricity of pre-filter circuit 302
Signal amplifies；And secondary filter circuit 304, and signal amplification circuit 303 connects, and to through signal
Signal of telecommunication secondary filtering after amplifying circuit 303 amplification, and the signal of telecommunication after secondary filtering is sent to
Single-chip microcomputer 5, it should be noted that and be also associated with A/D between slave computer reception unit 3 and single-chip microcomputer 5
Modulus acquisition module 9, A/D modulus gathers mould and slave computer receives acoustic signals that unit 3 receives soon turns
Change digital signal into and be sent to single-chip microcomputer 5, after single-chip microcomputer 5 receives this digital signal, to this signal
Carry out processing and making feedback；Slave computer transmitting element 4 receives the command signal of single-chip microcomputer and by this instruction
The host computer that signal is sent in host computer 1 in the form of a sound wave by speaker receives unit 6.
As a rule, the audio signal frequency range that human ear can be heard is 20～20000kHz, and to being less than
20Hz and the audio signal higher than 20kHz cannot be carried out distinguishing.According to sampling thheorem, when equipment is adopted
When sample frequency is more than 2 times of highest frequency in audio signal, the digital signal after sampling intactly retains
Information in primary signal.Digital signal after too low sample rate can make sampling is set and loses original letter
Number information, and use too high sample rate to be not much break-up value, human ear cannot be carried out distinguishing,
Therefore the sample rate of general main flow equipment is both configured to 44.1kHz, it is possible to meet conventional audiovisual demand.
It should be noted that in whole acoustic communication system the communication frequency of all command signals less than or
Half equal to system sampling frequency.
Fig. 2 is the acoustic receiver flow chart of a kind of acoustic communication system of the embodiment of the present invention.
Include as in figure 2 it is shown, described slave computer receives unit 3；Acoustic receiver circuit 301, is used for connecing
Receive the acoustic signals that host computer transmitting element 7 sends, and acoustic signals is converted into the signal of telecommunication；Preposition filter
Wave circuit 302, is connected 301 with sound wave circuit, and the signals of telecommunication receiving sound wave circuit connection 301 enter
Row Filtering Processing；Signal amplification circuit 303, is connected with pre-filter circuit 302, and to through preposition
The filtered signal of telecommunication of filter circuit 302 amplifies；And secondary filter circuit 304, and signal amplification circuit
303 connect, and to the signal of telecommunication secondary filtering after signal amplification circuit 303 amplifies, at slave computer
Receive and be also associated with A/D modulus acquisition module 9 in the middle of unit 3 and single-chip microcomputer 5.
Preferably, acoustic receiver circuit 301 can include electret special chip, and described electret is special
Chip can use MAX9812L chip.
Preferably, the operating voltage range of MAX9812L chip is 2.7V～3.6V, and described electret is special
One pin of chip MAX9812L connects miaow head, and miaow head is for being converted into the signal of telecommunication by acoustical signal, wherein
Miaow head bias is about 2.2V, owing to the power supply voltage range of MAX9812L chip is less, uses process
Middle power supply is the most restricted, and therefore the chip MAX9812L in the embodiment of the present invention adds dc-dc,
Wherein dc-dc has boosting, is extended by the power supply voltage range of acoustic receiver circuit 301
To DC3～12V.
Preferably, signal amplification circuit 303 can use dual power supply amplifier chip, wherein dual power supply amplifier
Chip can use OP07CP chip, described OP07CP dual power supply amplifier chip to be used for amplifying the signal of telecommunication.
Preferably, secondary filter circuit 304 includes second order high-pass filtering and the two of second-order low-pass filter cascade
Rank bandwidth-limited circuit, second order high-pass filtering circuit and second-order low-pass filter circuit all can use amplifier core
Sheet, wherein amplifier chip can use OP07CP, and described OP07CP amplifier chip is for entering the signal of telecommunication
Row secondary filtering.
Specifically, the operation principle of acoustic signals receiver module is as follows: first pass through acoustic receiver circuit 301
Receive the sound wave command signal that host computer 1 sends, owing to sound wave command signal can be mingled with in transmitting procedure
Some environment noises, acoustic receiver circuit 301 also can introduce interference signal during receiving, therefore need
To be followed by pre-filtering amplifying circuit at acoustic receiver circuit 301, noise and interference signal are filtered.
The acoustic signals amplitude received due to acoustic receiver circuit 301 is the least (hundreds of mV level), for ease of rear
Continuous processing of circuit, needs by amplitude, amplified for filtered acoustic signals circuit is amplified to zone of reasonableness.
Equally, the interference noise that pre-filter circuit 302 fails to eliminate also can be exaggerated circuit amplification, at signal
Noise interferences is decayed by the secondary filter circuit 304 that is followed by of amplifying circuit 303.Through sound wave
The hardware handles such as the filtering of signal receiving module, amplification, the signal of telecommunication quality after acoustic signals conversion is preferable,
A/D analog-digital converter can be sent directly into and carry out A/D conversion, analog electrical signal is converted to digital signal,
It is transferred to single-chip microcomputer main control module be decoded processing.
Fig. 3 is that the slave computer of a kind of acoustic communication system of the embodiment of the present invention receives unit acoustic receiver electricity
The circuit diagram on road 301.
Acoustic receiver circuit 301 is as it is shown on figure 3, the wherein special core of the electret of acoustic receiver circuit 301
The sheet MAX9812L that can use preferably realizes the process of acoustic signals.Wherein it is preferred to, the first electricity
Appearance C9 is 0.1uF, the second electric capacity C8 is 0.1uF, the 3rd electric capacity C6 is 0.1uF, the 4th electric capacity C7
For 0.1uF, the 5th electric capacity C5 be 0.1uF and the first resistance R2 is 2.2K Ω.
MAX9812L is a low cost, high performance amplifier of microphone, it have monophonic input,
The characteristics such as 20dB fixed gain and built-in low noise microphone bias, package dimension is little, it is adaptable to such as
The portable audios such as notebook computer, mobile phone, digital camera and palm PC.MAX9812L's
Amplifier gain bandwidth is 500kHz, exports up to the full amplitude of oscillation, has the 100dB electricity of industry top-level
Source rejection ratio, extremely low THD+N (0.015%).In addition, MAX9812L also has a series of economize on electricity
Characteristic: its source current is only 230 μ A, and overall shutdown mode can be by source current and bias current summation
It is down to 100nA.
Fig. 4 is the DC-DC mu balanced circuit figure of a kind of acoustic communication system of the embodiment of the present invention.
As shown in Figure 4, wherein it is preferred to, C1 be 1000uF, C2 be 0.1uF, C3 be 10uF,
C4 be 0.1uF and R1 be 100 Ω.DC-DC mu balanced circuit purpose is to realize the electricity of chip MAX9812L
Pressure is maintained in its working range, and the operating voltage range of MAX9812L is 2.7V～3.6V, described electret
One pin of body special chip MAX9812L connects miaow head, and miaow head is used for acoustical signal is converted into the signal of telecommunication,
Wherein miaow head bias is about 2.2V.Owing to the power supply voltage range of MAX9812L chip is less, use
During power supply the most restricted, therefore the present invention by add dc-dc, wherein DC-DC conversion
Utensil has boosting, and the power supply voltage range of acoustic receiver circuit 301 is expanded to DC3～12V.
Fig. 5 is signal amplification circuit 303 figure of a kind of acoustic communication system of the embodiment of the present invention.
As it is shown in figure 5, signal amplification circuit 303 can include dual power supply amplifier chip, wherein, preferably
Ground, described dual power supply amplifier chip can use OP07CP, in figure, it is preferable that R1 be 10K Ω,
R2 be 80K Ω and R4 be 5K Ω, Vin is signal input part, and Vout is signal output part, by electricity
LUSHEN number can get the gain of signal amplification circuit 303
The signal of signal amplification circuit 303 output is AC signal, it is impossible to straight by A/D analog-digital converter
Tapping into row conversion, needing AC signal through suitable direct current biasing is direct current signal, is then turned by A/D
Parallel operation carries out analog digital conversion.
The sampling configuration of embodiment of the present invention A/D modulus acquisition module (9) selects circulating sampling pattern, its
Described in be provided with one or more selector in A/D modulus acquisition module (9), described A/D modulus is adopted
The sampling channel of collection module is connected to the input port of these one or more selectores, each described selector
Output port be connected to described A/D modulus acquisition module (9) any one simulation input I/O mouth.
Preferably, the chip of A/D modulus acquisition module (9) selects MSP430F149 chip, single-chip microcomputer
MSP430F149 chip internal carries ADC12 sampling module, sets internal A/D converter accordingly
Put the analogue signal after can realizing direct current biasing and be converted to digital signal.The embodiment of the present invention is arranged
A/D sample frequency is 781.25Khz, and sampling configuration selects the repeat sequence pattern of ADC12,
16 sampling channels are all set to A0Simulation input pattern.
Alternatively, using the selector of passage can be four to select one, eight to select one etc.；Wherein, selector
Outfan be simultaneously connected to the A of chip0Simulation input I/O mouth.
Fig. 6 and Fig. 7 is two grades of bandwidth-limited circuit figures of a kind of acoustic communication system of the embodiment of the present invention.
As it can be seen, wherein, two grades of bandwidth-limited circuits include second order high-pass filtering circuit and step low-pass
Filter circuit, wherein second order high-pass filtering circuit and second-order low-pass filter circuit can include amplifier chip
Realize, it is preferable that amplifier chip can use OP07CP, the cut-off frequency of second order high-pass filtering circuit and
Passband gain is respectively as follows:
F0=1/ (2*PI*squre (R4*R5*C1*C2))
It is computed obtaining cut-off frequency F0=14.4kHz, passband gain A0=4.
Cut-off frequency and the passband gain of second-order low-pass filter circuit are respectively as follows:
F0=1/ (2*PI*squre (R3*R4*C1*C2))
It is computed obtaining cut-off frequency F0=15.9kHz, passband gain A0=4.
It should be noted that the chip not exclusive that the present invention uses, foregoing circuit is chip used for this
Bright a kind of preferred version, wherein host computer 1 can be mobile phone, notebook etc. communication equipment, this
The acoustic communication system of bright offer may be used in various scene, such as intelligent weighing system, below upper
Machine is introduction as a example by mobile phone.
One pin of single-chip microcomputer connects pressure transducer, and another pin connects display LCD display,
Mobile phone is used as controlling and command signal processing center as host computer.
User can be by single-chip microcomputer by measurement data on the weighing platform that pressure transducer is made by standing in
Display is on LCD liquid crystal display screen, and is sent to user mobile phone by transmitting element, and user can be by operation
Mobile phone is sent new instruction with acoustic signals form to the unit that receives of slave computer by the speaker of mobile phone, under
Position machine receives unit and receives the sound wave command signal transmitted from mobile phone speaker and make respective handling.
It should be appreciated that the above-mentioned detailed description of the invention of the present invention is used only for exemplary illustration or explanation
The principle of the present invention, and be not construed as limiting the invention.Therefore, without departing from the present invention spirit and
Any modification, equivalent substitution and improvement etc. done in the case of scope, should be included in the guarantor of the present invention
Within the scope of protecting.Additionally, claims of the present invention be intended to fall into scope and
Whole in the equivalents on border or this scope and border change and modifications example.
Claims (10)
1. an acoustic communication system, including host computer (1) and slave computer (2), it is characterised in that:
Described host computer (1) including:
Main control unit (8), for encoding command signal；
Host computer transmitting element (7), for receiving the finger after unit (3) sends coding to slave computer
Make signal；
Host computer receives unit (6), is used for receiving the instruction letter that slave computer transmitting element (4) sends
Number；
Described slave computer (2) including:
Single-chip microcomputer (5), the command signal received for slave computer receives unit (3) processes
And the signal processed is made feedback signal, by feedback signal by slave computer transmitting element (4)
Receive unit (6) to host computer to send；
Slave computer receives unit (3), is used for receiving the instruction that host computer transmitting element (7) sends
Signal is also sent to single-chip microcomputer (5)；
Slave computer transmitting element (4), is used for sending the command signal of single-chip microcomputer (5)；
The communication frequency of described command signal is less than or equal to the half of system sampling frequency.
Acoustic communication system the most according to claim 1, it is characterised in that described slave computer
Receive unit (3) to include:
Acoustic receiver circuit (301), is used for receiving the sound wave letter that host computer transmitting element (7) sends
Number, and acoustic signals is converted into the signal of telecommunication；
Pre-filter circuit (302), is connected (301) with sound wave circuit, and to sound wave circuit (301)
The signal of telecommunication received is filtered processing；
Signal amplification circuit (303), is connected with pre-filter circuit (302), and to through preposition
Filter circuit (302) the filtered signal of telecommunication amplifies；And
Secondary filter circuit (304), is connected with signal amplification circuit (303), and to through signal
Signal of telecommunication secondary filtering after amplifying circuit (303) amplification.
Acoustic communication system the most according to claim 2, it is characterised in that described sound wave connects
Receive circuit (301) and include that electret special chip, described electret special chip include:
BIAS pin, connects with one end of a resistance, and the other end of this resistance connects the positive pole of miaow head,
Described miaow head is for being converted into the signal of telecommunication by the acoustic signals received；
IN pin, connects with one end of the first electric capacity, the other end of this first electric capacity and resistance and miaow head
Junction series connection；
VCC pin, is connected with one end of the second electric capacity, the other end of this second electric capacity and bearing of miaow head
Pole connects and ground connection；
OUT pin, in parallel with the 3rd electric capacity and the 4th electric capacity.
Acoustic communication system the most according to claim 3, it is characterised in that described electret
Special chip also includes master control signal pins SHDN, and wherein said master control signal pins SHDN is even
It is connected to the dc-dc for voltage stabilizing.
Acoustic communication system the most according to claim 3, it is characterised in that described signal is put
Big circuit (303) includes dual power supply amplifier chip, and described dual power supply amplifier chip is for by the signal of telecommunication
Amplify.
Acoustic communication system the most according to claim 3, it is characterised in that described two grades of filters
Wave circuit (304) includes amplifier chip, and described amplifier chip is for signal of telecommunication secondary filtering.
Acoustic communication system the most according to claim 3, it is characterised in that described slave computer
Reception unit (3), by after command signal filtering, amplification, secondary filter, gathers through A/D modulus
Module (9) carries out analog digital conversion and is sent to single-chip microcomputer (5).
Acoustic communication system the most according to claim 7, it is characterised in that described A/D mould
The sampling configuration of number acquisition module (9) selects circulating sampling pattern, and wherein said A/D modulus gathers
Being provided with one or more selector in module (9), the sampling of described A/D modulus acquisition module is led to
Road is connected to the input port of these one or more selectores, and the output port of each described selector is even
Receive any one simulation input I/O mouth of described A/D modulus acquisition module (9).
Acoustic communication system the most according to claim 7, it is characterised in that described host computer
Transmitting element (7) includes that audio frequency plays subelement.
Acoustic communication system the most according to claim 9, it is characterised in that described host computer
(1) in, data are filled in message by host computer transmitting element (7) transmission mode according to message format,
Message is encoded, then carries out FSK modulation, modulation to high frequency, and play by described audio frequency
Subelement receives unit (3) with sound wave form downward position machine and sends.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510223704.XA CN106209259A (en) | 2015-05-05 | 2015-05-05 | A kind of acoustic communication system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510223704.XA CN106209259A (en) | 2015-05-05 | 2015-05-05 | A kind of acoustic communication system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106209259A true CN106209259A (en) | 2016-12-07 |
Family
ID=57458871
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510223704.XA Pending CN106209259A (en) | 2015-05-05 | 2015-05-05 | A kind of acoustic communication system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106209259A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101789538A (en) * | 2009-01-22 | 2010-07-28 | 深圳市华信天线技术有限公司 | Multifrequency patch antenna device |
| CN102611658A (en) * | 2012-03-06 | 2012-07-25 | 杭州锐昂科技有限公司 | Multi-channel sound wave communication system and method |
| CN202355412U (en) * | 2011-09-01 | 2012-08-01 | 东南大学 | Remote measurement module for related physiological information in rehabilitation trainning process |
| CN202534152U (en) * | 2012-05-18 | 2012-11-14 | 河海大学常州校区 | Remote-control ultrasonic wave power source |
-
2015
- 2015-05-05 CN CN201510223704.XA patent/CN106209259A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101789538A (en) * | 2009-01-22 | 2010-07-28 | 深圳市华信天线技术有限公司 | Multifrequency patch antenna device |
| CN202355412U (en) * | 2011-09-01 | 2012-08-01 | 东南大学 | Remote measurement module for related physiological information in rehabilitation trainning process |
| CN102611658A (en) * | 2012-03-06 | 2012-07-25 | 杭州锐昂科技有限公司 | Multi-channel sound wave communication system and method |
| CN202534152U (en) * | 2012-05-18 | 2012-11-14 | 河海大学常州校区 | Remote-control ultrasonic wave power source |
Non-Patent Citations (1)
| Title |
|---|
| 宣鸿伟，林善法，詹孟斯，傅凯丽，吕银音，陈竹幽: "基于FM1182芯片的便携消噪麦克风系统研制", 《现代电子技术》 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103237281B (en) | The earphone line control circuit of a kind of mobile terminal and line control method | |
| CN204014021U (en) | With the earphone of sound-conducting apparatus | |
| CN104053108A (en) | Intelligent auditory sense assisting equipment | |
| CN107395145A (en) | Amplifier | |
| CN108513224A (en) | Wireless microphone based on Bluetooth BLE transmission | |
| CN105472507A (en) | Method and system for audio optimization | |
| CN103188187A (en) | High-linearity ASK modulation method | |
| CN104113804B (en) | Speaker system and its driving method | |
| CN206775720U (en) | A kind of bluetooth connection for gathering multifunctional intellectual sound equipment and transport module | |
| CN204206429U (en) | Audio signal processing | |
| CN106209259A (en) | A kind of acoustic communication system | |
| CN105049998B (en) | A kind of audio communication device | |
| CN205454036U (en) | Earphone converter and earphone | |
| CN207625765U (en) | A kind of double Bluetooth audio frequency circuits and its speaker | |
| CN203563068U (en) | Infrared wireless voice communication device | |
| US20080101618A1 (en) | Two-Channel to Three-Channel Audio Converter | |
| CN206313947U (en) | A kind of wireless microphone system | |
| CN202721728U (en) | Mobile phone and audio amplification output circuit thereof | |
| CN207075067U (en) | Bluetooth microphone based on Aptx LL codings | |
| CN205454059U (en) | Blue tooth surface board | |
| CN206149483U (en) | Volume control circuit and financial transaction equipment | |
| CN105245997B (en) | A kind of control method transmitting control signal using audible | |
| CN205945755U (en) | Supersound communication decoding circuit and electromagnetic heating equipment | |
| CN205017302U (en) | Low -power consumption digit frequency module | |
| CN205847499U (en) | Digital audio decoding passive earphone with USB interface |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into 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: 20161207 |