CN103237279A - Directive speaker device and usage method thereof - Google Patents
Directive speaker device and usage method thereof Download PDFInfo
- Publication number
- CN103237279A CN103237279A CN2012102785854A CN201210278585A CN103237279A CN 103237279 A CN103237279 A CN 103237279A CN 2012102785854 A CN2012102785854 A CN 2012102785854A CN 201210278585 A CN201210278585 A CN 201210278585A CN 103237279 A CN103237279 A CN 103237279A
- Authority
- CN
- China
- Prior art keywords
- signal
- carrier
- modulation
- audio
- loudspeaker device
- 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
Images
Landscapes
- Circuit For Audible Band Transducer (AREA)
Abstract
The invention relates to a directive speaker device and a usage method thereof. The device comprises an audio output module used for outputting audio signals, a carrier generator used for producing carrier signals, a mode selecting module used for controlling whether or not the carrier generator produces the carrier signals, a modulator used for modulating the audio signals and the carrier signals to obtain modulating signals, an amplifier used for receiving modulating signals outputted by the modulator and amplifying the modulating signals, and a speaker used for receiving and playing amplifier output signals. By the aid of the directive speaker device and the usage method thereof, sound from the speaker has fine secrecy and spreading direction positioning.
Description
[technical field]
The present invention relates to have the communications field of directive property function, relate in particular to a kind of directional loudspeaker device and using method thereof.
[background technology]
Along with the fast development of wireless telecommunications, Global Mobile Phone is more and more, and people are not limited only to basic conversation to the requirement of mobile phone, more requires the face shaping of traditional mobile phone is proposed more requirements.Especially the arrival in 3G epoch, mobile multimedia technology be development thereupon also, and a lot of mobile phones have multiple amusement function, as video playback, digital vedio recording, recreation, GPS navigation etc.
Traditional loud speaker has been widely used in the communication terminal devices such as mobile phone, landline telephone, realize the playback of audio frequency, so, use the communication terminal of this conventional loudspeakers, in communication, communication terminal must be close to ear and propagate to carry out sound wave, under hands-free mode, converse by loud speaker only, cause sound wave to propagate to the four sides in the time of conversation again easily, further cause dialog context to reveal easily.
Therefore, be necessary to provide a kind of directional loudspeaker device and using method thereof at above-mentioned shortcoming.
[summary of the invention]
The object of the present invention is to provide a kind of directional loudspeaker device and using method thereof, this device can realize that the sound that loud speaker plays back has good disguise and location, the direction of propagation.
A kind of directional loudspeaker device, thus this device comprise audio frequency output module for output audio signal, for generation of the carrier generator of carrier signal, be used for the control carrier generator produce carrier signal or do not produce carrier signal mode selection module, be used for audio signal and carrier signal are modulated the modulator that obtains modulation signal, are used for receiving the modulation signal of modulator output and the amplifier that modulation signal is amplified and are used for receiving and the loud speaker of broadcast amplifier output signal.
Preferably, described audio frequency receiver module also comprises preamplifier, and this preamplifier is used for adjusting the audio signal size.
Preferably, described modulator adopts the AM modulation.
Preferably, the carrier signal that described carrier generator produces is the ultrasonic carrier signal, the resonance frequency equal and opposite in direction of the frequency of this carrier signal and the supersonic band of loud speaker.
Preferably, described resonance frequency size is 40kHz ~ 60kHz.
Preferably, described loud speaker is PVDF piezoelectric membrane loud speaker.
A kind of using method of directional loudspeaker device, this method comprise the steps: to provide an audio frequency output module, in order to output audio signal; Provide a carrier generator, in order to produce carrier signal; One mode selection module is provided, in order to be connected with carrier generator and control carrier signal that carrier generator produces is modulated or when carrier generator does not produce carrier wave independent audio signal modulation, modulation back output modulation signal; Provide an amplifier, in order to modulation signal is amplified; Provide a loud speaker, in order to receive modulation signal and the output sound after amplifying.
Preferably, described modulator adopts the AM modulation.
Beneficial effect of the present invention is: directional loudspeaker device provided by the invention and using method thereof can realize that the sound that loud speaker plays back has good disguise and location, the direction of propagation.
[description of drawings]
Fig. 1 is the system principle frame diagram of directional loudspeaker device of the present invention;
Fig. 2 is the operation principle schematic diagram of mode selection module;
Fig. 3 is the preferred circuit diagram of modulator in the directional loudspeaker device of the present invention.
[embodiment]
The invention will be further described below in conjunction with drawings and embodiments.
See also shown in Figure 1, the invention provides a kind of directional loudspeaker device, this device comprises the audio frequency output module for output audio signal, carrier generator for generation of carrier signal, be used for the mode selection module that the control carrier generator produces carrier signal or do not produce carrier signal, be used for thereby audio signal and carrier signal are modulated the modulator that obtains modulation signal, be used for receiving the modulation signal of modulator output and the amplifier that modulation signal is amplified, and the loud speaker that is used for receiving and playing amplifier output signal
Wherein, described audio frequency output module also comprises preamplifier, and this preamplifier is used for adjusting the voice signal size.The carrier signal that described carrier generator produces is the ultrasonic carrier signal, the resonance frequency equal and opposite in direction of the frequency of this carrier signal and the supersonic range of loud speaker, be generally 40 ~ 60kHz, so in the present invention, require the working band of loud speaker wideer, at least can all have higher sensitivity response in ordinary audio and ultrasonic wave frequency band, preferred loud speaker is PVDF piezoelectric membrane loud speaker.Described modulator multiplies each other carrier signal and audio signal, the modulation signal of ultrasonic carrier signal thereby the audio signal that obtaining parametric array needs superposes, in the present invention, described modulator adopts the AM modulation, and its core is to realize by multiplier, realize by using integrated AM modulation chip, as shown in Figure 3, be the preferred enforcement circuit diagram of modulator of the present invention, after ultrasonic carrier signal and the audio signal input, after analog multiplier MC1496 computing, obtain modulation signal.
Because the existence of mode selection module, can make directional loudspeaker device provided by the invention have audio mode and two kinds of patterns of directional mode, as shown in Figure 2, this mode selection module is to realize by relay, its working method is as follows: when audio mode, turn-off the carrier signal input modulator, modulator directly multiplies each other the audio signal of audio frequency output module output with direct current signal, and what obtain still is audio signal; And when directional mode, mode selection module allows carrier signal to enter modulator, and modulator multiplies each other audio signal and carrier signal, realizes the AM modulation function, obtains the modulation signal of the audio signal stack ultrasonic carrier signal of parametric array needs.
The operation principle of directional loudspeaker device provided by the invention under audio mode is as follows: audio frequency output module output audio signal, mode selection module turn-offs carrier signal and enters modulator, modulator multiplies each other audio signal and DC component, the result of modulation still is the message signal, the modulation signal that amplifier receives modulator output amplifies then, be admitted to loud speaker through the audio signal of amplifying, loud speaker is at the audio section vibration sounding.
The operation principle of directional loudspeaker device provided by the invention under directional mode is as follows: audio frequency output module output audio signal, mode selection module is opened carrier signal and is entered modulator, modulator multiplies each other audio signal and carrier signal components, the AM modulation result is the modulation signal of band ultrasonic carrier signal, it is the desired signal of parametric array, amplifier receives modulation signal and amplifies, and is admitted to loud speaker through the audio signal of amplifying, and loud speaker is at the supersonic band vibration sounding.
In the present invention, because loud speaker need so amplifier needs wideer frequency band equally, generally need the responsive bandwidth of 20 ~ 60kHz in the ultrasonic wave band operation.
A kind of using method of directional loudspeaker device, this method comprises the steps:
Provide an audio frequency output module, in order to output audio signal;
Provide a carrier generator, in order to produce carrier signal;
One mode selection module is provided, in order to be connected with carrier generator and control carrier signal that carrier generator produces is modulated or when carrier generator does not produce carrier wave independent audio signal modulation, modulation back output modulation signal;
Provide an amplifier, in order to modulation signal is amplified;
Provide a loud speaker, in order to receive modulation signal and the output sound after amplifying.
The operation principle of this directional loudspeaker device is as follows: audio frequency output module output audio signal, mode selection module are connected with carrier generator and control carrier generator generation carrier signal or do not produce carrier signal,
Wherein, select the module controls carrier generator when module and produce carrier signal, described modulator receives and audio signal modulation and carrier signal, exports modulation signal then, amplifier receives and amplifies modulation signal, is received and play amplifier output signal then by loud speaker;
Select the module controls carrier generator when module and do not produce carrier signal, modulator receives only and audio signal modulation, exports modulation signal then, and amplifier receives and amplifies modulation signal, is received and play amplifier output signal then by loud speaker.
In the present invention, preferred, described modulator adopts the AM modulation.
Under traditional audio mode, directional loudspeaker device provided by the invention is the same with conventional loudspeakers, be close to the ear received audio signal, but when directional mode, can be hands-free, loud speaker and ear can have certain distance, are generally in one meter, and at this time the sound that sends of loud speaker has good disguise and location, the direction of propagation, can be widely used in occasions such as car phone, 3G video calling, conference call.
Above-described only is preferred embodiments of the present invention, should be pointed out that for the person of ordinary skill of the art at this, under the prerequisite that does not break away from the invention design, can also make improvement, but these all belongs to protection scope of the present invention.
Claims (8)
1. directional loudspeaker device is characterized in that: thus this device comprise audio frequency output module for output audio signal, for generation of the carrier generator of carrier signal, be used for the control carrier generator produce carrier signal or do not produce carrier signal mode selection module, be used for audio signal and carrier signal are modulated the modulator that obtains modulation signal, are used for receiving the modulation signal of modulator output and the amplifier that modulation signal is amplified and are used for receiving and the loud speaker of broadcast amplifier output signal.
2. directional loudspeaker device according to claim 1, it is characterized in that: described audio frequency output module also comprises preamplifier, this preamplifier is used for adjusting the audio signal size.
3. directional loudspeaker device according to claim 1 is characterized in that: described modulator employing AM modulation.
4. directional loudspeaker device according to claim 1 is characterized in that: the carrier signal that described carrier generator produces is the ultrasonic carrier signal, the resonance frequency equal and opposite in direction of the frequency of this carrier signal and the supersonic band of loud speaker.
5. directional loudspeaker device according to claim 3 is characterized in that: the big or small 40kHz ~ 60kHz of being of described resonance frequency.
6. according to any described directional loudspeaker device of claim 1 to 5, it is characterized in that: described loud speaker is PVDF piezoelectric membrane loud speaker.
7. using method of directional loudspeaker device according to claim 1, this method comprises the steps:
Provide an audio frequency output module, in order to output audio signal;
Provide a carrier generator, in order to produce carrier signal;
One mode selection module is provided, in order to be connected with carrier generator and control carrier signal that carrier generator produces is modulated or when carrier generator does not produce carrier wave independent audio signal modulation, modulation back output modulation signal;
Provide an amplifier, in order to modulation signal is amplified;
Provide a loud speaker, in order to receive modulation signal and the output sound after amplifying.
8. the using method of directional loudspeaker device according to claim 7 is characterized in that: described modulator employing AM modulation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102785854A CN103237279A (en) | 2012-08-07 | 2012-08-07 | Directive speaker device and usage method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102785854A CN103237279A (en) | 2012-08-07 | 2012-08-07 | Directive speaker device and usage method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103237279A true CN103237279A (en) | 2013-08-07 |
Family
ID=48885290
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012102785854A Pending CN103237279A (en) | 2012-08-07 | 2012-08-07 | Directive speaker device and usage method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103237279A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106353716A (en) * | 2016-08-31 | 2017-01-25 | 电子科技大学 | Method for reducing power consumption based on full-band acoustic wave directional system |
| CN107171738A (en) * | 2017-06-29 | 2017-09-15 | 深圳传音控股有限公司 | The apparatus and method that ultrasonic propagation is carried out to audio |
| CN110870329A (en) * | 2017-07-19 | 2020-03-06 | 株式会社索思未来 | Sound processing device and sound output device |
| CN112333605A (en) * | 2020-11-03 | 2021-02-05 | 宁波鑫丰声悦科技股份有限公司 | Sound output control method and system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006245731A (en) * | 2005-03-01 | 2006-09-14 | Citizen Watch Co Ltd | Directional speaker |
| CN1922916A (en) * | 2004-02-19 | 2007-02-28 | 精工爱普生株式会社 | Projector equipped with ultrasonic speaker, and method for displaying sound reproduction range in projector |
| CN101741325A (en) * | 2008-11-24 | 2010-06-16 | 无锡华润矽科微电子有限公司 | Class-D audio-frequency power amplifier with carrier wave adjustable module and carrier wave modulation method thereof |
| CN102160399A (en) * | 2008-09-18 | 2011-08-17 | 松下电器产业株式会社 | Sound reproducing apparatus |
| CN102404664A (en) * | 2010-09-09 | 2012-04-04 | 王建清 | Directional loudspeaker |
-
2012
- 2012-08-07 CN CN2012102785854A patent/CN103237279A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1922916A (en) * | 2004-02-19 | 2007-02-28 | 精工爱普生株式会社 | Projector equipped with ultrasonic speaker, and method for displaying sound reproduction range in projector |
| JP2006245731A (en) * | 2005-03-01 | 2006-09-14 | Citizen Watch Co Ltd | Directional speaker |
| CN102160399A (en) * | 2008-09-18 | 2011-08-17 | 松下电器产业株式会社 | Sound reproducing apparatus |
| CN101741325A (en) * | 2008-11-24 | 2010-06-16 | 无锡华润矽科微电子有限公司 | Class-D audio-frequency power amplifier with carrier wave adjustable module and carrier wave modulation method thereof |
| CN102404664A (en) * | 2010-09-09 | 2012-04-04 | 王建清 | Directional loudspeaker |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106353716A (en) * | 2016-08-31 | 2017-01-25 | 电子科技大学 | Method for reducing power consumption based on full-band acoustic wave directional system |
| CN106353716B (en) * | 2016-08-31 | 2019-05-14 | 电子科技大学 | A method of power consumption is reduced based on Whole frequency band sound wave orientation system |
| CN107171738A (en) * | 2017-06-29 | 2017-09-15 | 深圳传音控股有限公司 | The apparatus and method that ultrasonic propagation is carried out to audio |
| CN110870329A (en) * | 2017-07-19 | 2020-03-06 | 株式会社索思未来 | Sound processing device and sound output device |
| CN112333605A (en) * | 2020-11-03 | 2021-02-05 | 宁波鑫丰声悦科技股份有限公司 | Sound output control method and system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104935742B (en) | Communication terminal and the method for improving its tonequality under handset mode | |
| US20050136848A1 (en) | Multi-mode audio processors and methods of operating the same | |
| CN100531242C (en) | Sound reproduction device and method in portable electronic equipment | |
| US8284975B2 (en) | Method of outputting audio signal and mobile communication terminal using the method | |
| CN102165791A (en) | Dual-mode loudspeaker | |
| CN207340160U (en) | A kind of wireless K songs sound system | |
| CN103716459A (en) | Audio system having mobile phone and intercom call functions | |
| CN103237279A (en) | Directive speaker device and usage method thereof | |
| CN105681948A (en) | System and method for improving voice quality of mobile terminal in receiver mode | |
| CN114466097A (en) | Mobile terminal capable of preventing sound leakage and sound output method of mobile terminal | |
| US8073482B2 (en) | Mobile phone with optional audio output function | |
| JP4569414B2 (en) | Audio output device | |
| CN105187993A (en) | Three-dimensional stereo headphone device and recovery method | |
| CN106034272A (en) | Loudspeaker compensation system and portable mobile terminal | |
| CN205812305U (en) | A kind of intelligent radio microphone | |
| CN201054596Y (en) | Automatic detection device for Bluetooth frequency modulation transmission belt port | |
| KR200355341Y1 (en) | Mobile-communication terminal board with ultrasonic-speaker system | |
| CN101466057A (en) | Portable electronic device | |
| KR20110080306A (en) | A mobile device having hearing aid compatibility | |
| CN201300785Y (en) | Electric vehicle provided with hand-free talking function | |
| CN201830322U (en) | High-volume mobile phone | |
| CN101083808A (en) | Wireless playing method and system for handset audio | |
| CN101312564A (en) | Apparatus realizing music play sharing on mobile device and method thereof | |
| CN103578512A (en) | Method and device for rapidly playing back records | |
| KR20030096650A (en) | Fm transmitter for linking audio |
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 |
Application publication date: 20130807 |
|
| RJ01 | Rejection of invention patent application after publication |