CN205946136U - Directional loudspeaker system based on ultrasonic wave technical development - Google Patents
Directional loudspeaker system based on ultrasonic wave technical development Download PDFInfo
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Abstract
The utility model relates to an electron audio technology field, concretely relates to directional loudspeaker system based on ultrasonic wave technical development, including audio signal input unit, signal modulation unit, ultrasonic wave generation unit, infrared inductor and microcontroller, audio signal input unit's output and signal modulation unit electricity are connected, and signal modulation unit's output is connected with ultrasonic wave generation unit's first input end electricity, and infrared inductor's output and microcontroller electricity are connected, and microcontroller is connected with audio signal input unit's first input end electricity, ultrasonic wave generation unit includes the ultrasonic transducer of two at least different frequencies, signal modulation unit makes the audio signal who inputs on the ultrasonic wave carrier signal. Ultrasonic transducer produces the ultrasonic wave of different frequency, and the difference frequency ripples that interact produced in propagating process has high directive property, realization sound sound signal's direction propagation. Infrared inductor and microcontroller automatic control loudspeaker system open and close.
Description
Technical field
The utility model is related to electronic audio frequency technical field and in particular to a kind of raised based on the orientation of ultrasonic technology exploitation
Sound device system.
Background technology
The sound wave that common loudspeaker sends is all 360 degree and radiate, i.e. spherical wave.Under different frequency, angle,
, certainly with difference, simply common audio amplifier is more much greater than the imagination in the acoustic wave energy at side, the back side, especially for acoustic wave energy
It is low frequency, substantially direction-free；High band high directivity a bit, but is also simply decayed at side rear (45 degree/315 degree)
3～6 decibels about, so the sound that traditional speaker system sends generally all is propagated from all directions, needing
In the environment of voice directional spreading, a lot of inconvenience are resulted in using traditional speaker system.
For example, the display language in traditional museum is based on material object, photo, explanatory note, sculpture, model etc., sometimes
Seem stiff, be also unfavorable for that visitor understands the cultural connotation of showpiece.Modern Museum is in order to adapt to the spiritual demand of masses, fortune
With technological meanses such as a lot of acousto-optic-electrics, so that showpiece more " is lived ", show one vivid interaction of visitor
Scene, makes visitor when visiting a museum, and really is able to reach the purpose obtaining knowledge, cultivating one's taste.But museum
The showpiece Numerous of display, and location space is limited, if the use of the sound that general loudspeaker sends being towards four sides
Propagate from all directions, will necessarily interfere between each sound, allow visitor have the sensation kind as strolling food market, allow museum
Very big painstaking effort are spent to go the atmosphere built to have a greatly reduced quality.If there are guide interpreting level uneven, visitor listens one to know half
Solution, misses and cannot supplement, environment is noisy, also allows visitor see exhibition mood and is affected.Many museums are this exclusively for spectators
Provide earphone, but wear the discomfort easily causing ear or head for a long time, not only manage pretty troublesome, cross-reference ear
Machine is also unhygienic, and is frequently necessary to safeguard.
For another example, in living at ordinary times or working, you usually can think that a people listens music, but worry to bother surrounding
People.In the brain of most people, sound always surrounding diffusion spreads through sex intercourse, the either sound equipment of family or television set, or
The square dance music that on evening square, aunts jump is all so although can be shared with everybody, but sometimes could also say that
Annoying noise pollution.
So, sound how could be allowed to put together, or say reinforcement directive property with technical term？Modal just
It is plus sige angle before loudspeaker unit, as shown in figure 1, the Professional sound box in high pitch loudspeaker, dancing hall is exactly such.Bugle sound
The low frequency of case does not change, but the directive property of medium-high frequency section strengthens, and perpendicular, horizontal direction can control at 100 degree
Within, can decay beyond this angle more than 12 decibels.Centre and the distance on both sides that aditus laryngis exports to bugle, then sound
The time that sound travels to also does not wait (that is, the phase angle differences of exit portion are very big), so the wave surface of exit portion becomes
To in the spherical wave centered on aditus laryngis.Even having added the audio amplifier spherical wave of bugle, the angle of flare of sound wave is also raised one's voice than commonly
Little many of device.
Present long-range projection bugle has had a little changes, as shown in Fig. 2 the mid portion of splayed configuration bugle is added
The stopper of individual diamond pattern, high pitch can be done delay process in the sound wave of bugle mid portion by the diamond pattern stopper in the middle of bugle, make
The time of the outlet each several part from the aditus laryngis of bugle to bugle for the sound wave is equal.That is, sound wave is in each portion of outlet of this bugle
The phase angle divided is identical.So, the wave surface in the exit portion of bugle trends towards column type, and the orientation realizing sound wave passes
Broadcast so that being almost not felt by sound in other regions outside Acoustic Wave Propagation direction.
In addition to bugle, another one method is exactly to allow audio amplifier send cylindrical wave, is arranged with many loudspeaker units, extensively
Broadcast post is the cylindrical wave audio amplifier being easier to see, and its vertical directivity is very strong, and horizontal directivity is general.If also will be again
What if strengthen directive property？Acoustic engineers investigated " linear array " audio amplifier.Linear array is by several alt lists
The mode that unit powers up son with physics is processed, and can be controlled very precisely directive property.The mode of physics is in each unit
Front plus acoustic lens, the mode of electronics is will to be divided after audio signal digitizing and the digital effect of complexity is processed, then
Be converted to analog signal and respectively driving independently amplified to each unit.
Above-mentioned using additional bugle, diamond pattern stopper or by the way of being aligned using many loudspeaker units, be required for pin
To the structure of loudspeaker, loaded down with trivial details and complicated improvement is carried out to specific applicable situation, there is no general applicability, therefore to biography
System speaker system further improve and innovate, realize audio frequency direction propagation while, improve it and be generally suitable for
Property, become technical problem urgently to be resolved hurrily at present.
Utility model content
In order to overcome the defect of prior art, the purpose of this utility model is that a kind of offer audio frequency propagation directive property is strong, has
There are infrared auto-induction function, the directional loudspeaker system based on ultrasonic technology exploitation easy to use.
In order to realize object above, the utility model adopts the following technical scheme that：
A kind of directional loudspeaker system based on ultrasonic technology exploitation, including audio data input unit, signal modulation
Unit, ultrasonic wave generating unit, infrared inductor and microcontroller；The output end of audio data input unit and signal modulation list
Unit's electrical connection, the output end of signal modulation unit is electrically connected with the first input end of ultrasonic wave generating unit, infrared inductor
Output end is electrically connected with microcontroller, and microcontroller electrically connects control audio frequency letter with the first input end of audio data input unit
The opening and closing of number input block；Described ultrasonic wave generating unit includes the ultrasonic transducer of at least two different frequencies；
Described signal modulation unit is by the modulates audio signals inputting on ultrasonic carrier signal.
Described ultrasonic wave generating unit includes the ultrasonic transducer of 50～100 different frequencies laid side by side.
The frequency of described ultrasonic transducer is between 20kHz～40kHz.
In order to control the size of volume, also include sound volume regulation unit, the input of described sound volume regulation unit and audio frequency
Second input electrical connection of signal input unit, the output end of sound volume regulation unit inputs with the second of ultrasonic wave generating unit
End electrical connection.
The directional loudspeaker system that the utility model is developed based on ultrasonic technology, compares traditional audio system, increases
Signal modulation unit and ultrasonic wave instead give birth to unit, after the audio data input unit incoming audio signal, adjust through signal
Unit processed, using radio amplitude modulated technique, by the modulates audio signals accessing on ultrasonic carrier signal, through ultrasonic wave
The ultrasonic transducer of generating unit, the audio signal after modulation is converted into the sound wave of ultrasonic frequency, due to ultrasonic waves
Can device frequency different, audio signal produces the ultrasonic wave of different frequency after ultrasonic transducer, different frequency ultrasonic
During ripple is propagated in atmosphere, due to the nonlinear acoustics effect of air, these signals can occur reciprocation and explain by oneself
Adjust, and then produce the new ripple with frequency and difference frequency that frequency is former ultrasonic wave, difference frequency sound wave falls in audible voice range, and due to ultrasonic
Ripple has a high directivity, therefore the ultrasonic wave of different frequency interact in communication process generation difference frequency ripple also have high
Directive property, thus realizing the direction propagation of voice signal, that is, orients sounding.Using the utility model ultrasonic directional loudspeaker system
Sound is gathered together by system by standard audio interface, as the light that flashlight sends, by the sound assembled to specific
Direction and regional spread.
Meanwhile, the directional loudspeaker system that the utility model is developed based on ultrasonic technology, setting infrared inductor and micro-
Controller, after infrared inductor is in sound transmission region sensing all human bodies, to microcontroller sending signal, microcontroller accepts
To after induced signal, audio input unit is controlled to access audio-frequency information, after human body leaves sound transmission region, infrared inductor
It is not felt by human body, microcontroller is not readily accessible to induced signal, and then audio input unit incoming audio signal can not be controlled,
Thus terminating loudspeaker to play sound, by infrared inductor and microcontroller implementation, loudspeaker is opened and closed automatically,
Save the loss of labor management cost and the energy.
Brief description
Fig. 1 be described in the utility model background technology before loudspeaker unit plus sige angle overall structure diagram；
Fig. 2 be described in the utility model background technology before loudspeaker unit plus sige angle and rhombus stopper overall structure
Schematic diagram；
Fig. 3 is that the work of the directional loudspeaker system based on ultrasonic technology exploitation that the utility model embodiment provides is former
Reason block diagram.
Specific embodiment
Embodiment
A kind of directional loudspeaker system based on ultrasonic technology exploitation, including audio data input unit 1, signal modulation
Unit 2, ultrasonic wave generating unit 3, infrared inductor 4 and microcontroller 5；The output end of audio data input unit 1 and signal
Modulating unit 2 electrically connects, and the output end of signal modulation unit 2 is electrically connected with the first input end of ultrasonic wave generating unit 3, infrared
The output end of inductor 4 is electrically connected with microcontroller 5, and microcontroller 5 is electrically connected with the first input end of audio data input unit 1
Connect the opening and closing controlling audio data input unit 1；Described signal modulation unit 2 by input modulates audio signals arrive surpass
On sound wave carrier signal；Described ultrasonic wave generating unit 3 includes the ultrasonic waves of 50～100 different frequencies being set up in parallel
Can device；The frequency of wherein ultrasonic transducer is between 20kHz～40kHz.
Optionally, in order to control the size of volume, sound volume regulation unit 6, the input of described sound volume regulation unit 6 are also included
End electrically connects with the second input of audio data input unit 1, the output end of sound volume regulation unit 6 and ultrasonic wave generating unit
3 the second input electrical connection.
The directional loudspeaker system that the present embodiment is developed based on ultrasonic technology, sound is connect by audio data input unit
Enter, the audio signal warp on signal modulation unit is by modulates audio signals to ultrasonic carrier signal, after then modulating
Cross the multiple ultrasonic transducers being set up in parallel of ultrasonic wave generating unit, generate the ultrasonic wave of different frequency, different frequency
During ultrasonic wave is propagated in atmosphere, due to the nonlinear acoustics effect of air, these signals can occur reciprocation and
From demodulation, and then produce the new ripple with frequency and difference frequency that frequency is former ultrasonic wave, difference frequency sound wave falls in audible voice range, and due to
Ultrasonic wave has a high directivity, and therefore interact in the communication process difference frequency ripple of generation of the ultrasonic wave of different frequency also has
High directive property, thus realizing the direction propagation of voice signal, that is, orients sounding.Raised one's voice using the utility model ultrasonic directional
Sound is gathered together by device system by standard audio interface, as the light that flashlight sends, by the sound assembled only to spy
Fixed direction and regional spread.
Meanwhile, the directional loudspeaker system that the present embodiment is developed based on ultrasonic technology, setting infrared inductor and micro-control
Device processed, after infrared inductor is in sound transmission region sensing all human bodies, to microcontroller sending signal, microcontroller receives
After induced signal, audio input unit is controlled to access audio-frequency information, after human body leaves sound transmission region, infrared inductor sense
By less than human body, microcontroller is not readily accessible to induced signal, and then can not control audio input unit incoming audio signal, from
And terminate loudspeaker and play sound, by infrared inductor and microcontroller implementation, loudspeaker is opened and closed automatically, section
Save the loss of labor management cost and the energy.
In addition, traditional sound equipment, its sound field dissipates, if multi-acoustical is together, will interfere with each other it is impossible to divide
Differentiate Chu's sound-content, after the present embodiment ultrasonic directional speaker system, only can hear in specified scope and think
The content wanted, even if in the case that multiple sources of sound are close, also there is no concern that, such as, in noisy retail sales field, sound is eternal
So clear；In quiet museum, exhibition room, join different audio frequency to different showpieces, and will not interfere；Can orient
Speak with some people downstairs, interference is not produced to others；Child can be absorbed in studies and not be subject to ectocine；Can customize private noisy
Clock and do not affect at one's side other people；Etc..
Claims (4)
1. a kind of directional loudspeaker system based on ultrasonic technology exploitation it is characterised in that include audio data input unit,
Signal modulation unit, ultrasonic wave generating unit, infrared inductor and microcontroller；The output end of audio data input unit and letter
The electrical connection of number modulating unit, the output end of signal modulation unit is electrically connected with the first input end of ultrasonic wave generating unit, infrared
The output end of inductor is electrically connected with microcontroller, and microcontroller electrically connects control with the first input end of audio data input unit
The opening and closing of audio data input unit processed；Described ultrasonic wave generating unit includes the ultrasonic wave of at least two different frequencies
Transducer；Described signal modulation unit is by the modulates audio signals inputting on ultrasonic carrier signal.
2. the directional loudspeaker system based on ultrasonic technology exploitation as claimed in claim 1 is it is characterised in that described ultrasonic
Ripple generating unit includes the ultrasonic transducer of 50～100 different frequencies laid side by side.
3. the directional loudspeaker system based on ultrasonic technology exploitation as claimed in claim 2 is it is characterised in that described ultrasonic
The frequency of wave transducer is in the range of 20kHz～40kHz.
4. the directional loudspeaker system based on ultrasonic technology exploitation as described in any one of claims 1 to 3, its feature, also
Including sound volume regulation unit, described sound volume regulation unit receives a sound source signal and adjusts the volume of described sound source signal, volume
Second input of the input of adjustment unit and audio data input unit is electrically connected with, the output end of sound volume regulation unit with
Second input of ultrasonic wave generating unit is electrically connected with.
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107708041A (en) * | 2017-09-02 | 2018-02-16 | 上海朗宴智能科技有限公司 | A kind of audio beam loudspeaker |
| CN108435517A (en) * | 2017-02-16 | 2018-08-24 | 南宁富桂精密工业有限公司 | Direct sound play system and its playback method |
| CN108777139A (en) * | 2018-04-08 | 2018-11-09 | 杭州电子科技大学 | A kind of alarm clock of voice directional spreading |
| CN110381412A (en) * | 2019-06-06 | 2019-10-25 | 深圳康佳电子科技有限公司 | A kind of device that realizing directive property sounding, method and electronic equipment |
| WO2019233068A1 (en) * | 2018-06-06 | 2019-12-12 | 珠海格力电器股份有限公司 | Method for reducing loudspeaker noise in process of remotely controlling air conditioner |
| WO2020015297A1 (en) * | 2018-07-19 | 2020-01-23 | 珠海格力电器股份有限公司 | Directional broadcasting method, apparatus, household appliance, and computer readable storage medium |
| 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 |
| CN113573207A (en) * | 2020-04-29 | 2021-10-29 | 维沃移动通信有限公司 | Electronic device |
| CN113573217A (en) * | 2020-04-29 | 2021-10-29 | 维沃移动通信有限公司 | Speaker and electronic equipment |
| WO2023035472A1 (en) * | 2021-09-07 | 2023-03-16 | 歌尔股份有限公司 | Audio system and control method and apparatus thereof |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108435517B (en) * | 2017-02-16 | 2019-12-31 | 南宁富桂精密工业有限公司 | Directional sound playing system and playing method thereof |
| CN108435517A (en) * | 2017-02-16 | 2018-08-24 | 南宁富桂精密工业有限公司 | Direct sound play system and its playback method |
| US10412492B2 (en) | 2017-02-16 | 2019-09-10 | Nanning Fugui Precision Industrial Co., Ltd. | Directional sound playing system and method |
| CN107708041A (en) * | 2017-09-02 | 2018-02-16 | 上海朗宴智能科技有限公司 | A kind of audio beam loudspeaker |
| CN108777139A (en) * | 2018-04-08 | 2018-11-09 | 杭州电子科技大学 | A kind of alarm clock of voice directional spreading |
| WO2019233068A1 (en) * | 2018-06-06 | 2019-12-12 | 珠海格力电器股份有限公司 | Method for reducing loudspeaker noise in process of remotely controlling air conditioner |
| WO2020015297A1 (en) * | 2018-07-19 | 2020-01-23 | 珠海格力电器股份有限公司 | Directional broadcasting method, apparatus, household appliance, and computer readable storage medium |
| CN110381412A (en) * | 2019-06-06 | 2019-10-25 | 深圳康佳电子科技有限公司 | A kind of device that realizing directive property sounding, method and electronic equipment |
| CN113573207A (en) * | 2020-04-29 | 2021-10-29 | 维沃移动通信有限公司 | Electronic device |
| CN113573217A (en) * | 2020-04-29 | 2021-10-29 | 维沃移动通信有限公司 | Speaker and electronic equipment |
| CN113573217B (en) * | 2020-04-29 | 2024-03-05 | 维沃移动通信有限公司 | Speaker and electronic equipment |
| 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 |
| WO2023035472A1 (en) * | 2021-09-07 | 2023-03-16 | 歌尔股份有限公司 | Audio system and control method and apparatus thereof |
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Effective date of registration: 20230320 Address after: 100000 1221, Unit 3, 11th Floor, No. 22 Guanghua Road, Chaoyang District, Beijing Patentee after: Beijing Dafang Yicai Exhibition Co.,Ltd. Address before: 529, Floor 5, Building 16, Zone 8, No. 305, Guang'anmenwai Street, Xicheng District, Beijing, 100055 Patentee before: BEIJING FANJING XINXIANG TECHNOLOGY DEVELOPMENT CO.,LTD. |
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Effective date of registration: 20230605 Address after: B609-25, Floor 5, Building 21, Pingyuanli, Xicheng District, Beijing Patentee after: BEIJING FANJING XINXIANG TECHNOLOGY DEVELOPMENT CO.,LTD. Address before: 100000 1221, Unit 3, 11th Floor, No. 22 Guanghua Road, Chaoyang District, Beijing Patentee before: Beijing Dafang Yicai Exhibition Co.,Ltd. |