CN106125771A - Audio directional loudspeaker and forward method thereof - Google Patents
Audio directional loudspeaker and forward method thereof Download PDFInfo
- Publication number
- CN106125771A CN106125771A CN201610674620.2A CN201610674620A CN106125771A CN 106125771 A CN106125771 A CN 106125771A CN 201610674620 A CN201610674620 A CN 201610674620A CN 106125771 A CN106125771 A CN 106125771A
- Authority
- CN
- China
- Prior art keywords
- transducer array
- ultrasound transducer
- acoustic signals
- directional loudspeaker
- audio
- 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.)
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Classifications
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D3/00—Control of position or direction
- G05D3/12—Control of position or direction using feedback
-
- 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
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2430/00—Signal processing covered by H04R, not provided for in its groups
Abstract
A kind of audio directional loudspeaker, including speaker body and the ultrasound transducer array being located in speaker body, speaker body is connected with motor, speaker body is additionally provided with controller, microphone assembly, acoustic signals processing unit, orientation detection unit, microphone assembly is used for receiving acoustic signals, and acoustic signals is sent to signal processing unit, acoustic signals processing unit is poor according to the time of advent of described acoustic signals, determine the position of the signal source of acoustic signals, and the positional information of signal source is sent to controller, orientation detection unit for detection and to described controller send ultrasound transducer array towards azimuth information, controller is for determining that ultrasound transducer array needs direction and the angle of rotation, and drive stepping motor work, make ultrasound transducer array towards orientation just to described signal source.The invention also discloses a kind of method that audio directional loudspeaker turns to, it is achieved that the self-adapting steering of audio directional loudspeaker.
Description
Technical field
The present invention relates to speaker field, particularly relate to a kind of audio directional loudspeaker and forward method thereof.
Background technology
The rise of Internet of Things is very easy to the life style of people, has been also greatly facilitate sending out of Smart Home industry
Exhibition, makes Smart Home product have preferable development prospect and market expectations.In an intelligent home system, private information is handed over
It is a very important part mutually, such as, it is desirable to not affect other people of periphery while it appreciates music.
For this purpose, audio directional loudspeaker arises at the historic moment, it is thus achieved that more concern and research, and has been carried out
Commercially available audio directional loudspeaker.Audio directional loudspeaker passes through after the audio signal of input is modulated, is amplified
Ultrasound transducer array direction propagation.The audible sound acoustic beam that directivity is extremely strong can be realized, and the environment beyond this acoustic beam produces
Raw volume is minimum even be can't hear.
But, owing to audio directional loudspeaker has height directivity, when user will be difficult to hear sound after motion direction
Frequently the sound of directional loudspeaker, needs manually to regulate the orientation of audio directional loudspeaker, is inconvenient for.And due on the market
Ultrasonic transducer easily occurs that performance is inconsistent, uses its array formed often to produce acoustic beam secondary lobe, causes directional properties to be deteriorated.
Summary of the invention
In view of above-mentioned condition, the present invention provides audio directional loudspeaker and the forward method thereof of a kind of self-adapting steering.
Embodiments provide a kind of audio directional loudspeaker, including speaker body be located at speaker body
Upper, ultrasound transducer array for direction propagation audio signal, is provided with base, on described base below described speaker body
Being installed with motor, described motor is connected by swingle with described speaker body, and described speaker body also sets
It is equipped with controller, microphone assembly, acoustic signals processing unit, orientation detection unit, wherein,
Described microphone assembly is electrically connected with described acoustic signals processing unit, is used for receiving acoustic signals, and by institute
State acoustic signals to send to described signal processing unit；
Described acoustic signals processing unit is poor according to the time of advent of described acoustic signals, determines the letter of described acoustic signals
The position in number source, and the positional information of described signal source is sent to described controller；
Described orientation detection unit, for detection and to described controller send described ultrasound transducer array towards side
Position information；
Described controller is electrically connected with described motor, acoustic signals processing unit and orientation detection unit, is used for
Positional information according to described signal source and described ultrasound transducer array determine described ultrasonic transducer towards azimuth information
Array needs direction and the angle rotated, and drives described motor to work, and makes described ultrasound transducer array towards orientation
Just to described signal source.
Above-mentioned audio directional loudspeaker, wherein, described speaker body is additionally provided with multiple secondary lobe unit, the plurality of
Secondary lobe unit is positioned at around described ultrasound transducer array, and each described secondary lobe unit includes at least one ultrasonic transducer, often
The phase place of ultrasonic transducer of individual described secondary lobe unit, loudness are individually controlled, and are used for eliminating ultrasound transducer array and produce
Acoustic beam secondary lobe.
Above-mentioned audio directional loudspeaker, wherein, described secondary lobe unit arranges 4, lays respectively at described ultrasonic transducer battle array
On four angles of row.
Above-mentioned audio directional loudspeaker, wherein, described microphone assembly includes the described ultrasound transducer array of multiple insertion
Mike in gap, multiple described mikes one linear microphone array of composition.
Above-mentioned audio directional loudspeaker, wherein, described microphone assembly includes 4 mikes.
Above-mentioned audio directional loudspeaker, wherein, described speaker body is additionally provided with radio communication unit, and client is led to
Cross described radio communication unit and send audio signal to described audio speaker.
Above-mentioned audio directional loudspeaker, wherein, described motor is provided with the rotating shaft of band gear, under described swingle
End is socketed in described rotating shaft, and the inner surface of described lower end is provided with and the teeth groove of described gear matches, the upper end of described swingle
It is fixed on the bottom of described speaker body.
The embodiment of the present invention additionally provides a kind of audio directional loudspeaker forward method, and described audio directional loudspeaker sets
It is equipped with ultrasound transducer array, described ultrasound transducer array is provided with the microphone assembly for receiving acoustic signals, institute
The method of stating includes:
The acoustic signals received according to microphone assembly described in TDOA algorithm process, determines the signal source of described acoustic signals
Position；
Calculate angle between the position towards orientation and described signal source that ultrasound transducer array is current；
Described ultrasound transducer array rotates described angle, makes described ultrasound transducer array towards orientation just to described letter
Number source.
Said method, wherein, described ultrasound transducer array rotates described angle so that it is towards orientation just to described signal
The step in source includes:
Judge whether described angle is zero；
When described angle is not zero, described ultrasound transducer array rotates described angle so that it is towards orientation just to institute
State signal source.
The present invention obtains acoustic signals by microphone assembly, according to position and the ultrasonic transducer battle array in acoustic signals source
Before Herba Orobanches towards orientation, determine ultrasound transducer array need rotate direction and angle, then drive stepping motor work,
Speaker body is made to rotate corresponding angle, it is ensured that institute's ultrasound transducer array is just signal source to acoustic signals towards orientation.
Ultrasound transducer array consistent with the direction of audio signal direction propagation towards orientation, audio signal all the time towards
The signal source of acoustic signals is propagated, it is achieved that the self-adapting steering of audio directional loudspeaker.When a part in one family environment
People needs to appreciate music, and another part people needs reading or during rest, the sound that audio directional loudspeaker is propagated all the time towards
Movable, send the part people of sound, for user for bring happier, more easily experience
Accompanying drawing explanation
Fig. 1 is the three-dimensional exploded view of the audio directional loudspeaker that first embodiment of the invention proposes；
Fig. 2 is the structural representation of the audio directional loudspeaker that first embodiment of the invention proposes；
Fig. 3 is the structured flowchart of the audio directional loudspeaker that first embodiment of the invention proposes；
Fig. 4 is the structural representation of the audio directional loudspeaker that second embodiment of the invention proposes；
Fig. 5 is the flow chart of the audio directional loudspeaker forward method that third embodiment of the invention proposes.
Main element symbol description
Detailed description of the invention
For the ease of understanding the present invention, below with reference to relevant drawings, the present invention is described more fully.In accompanying drawing
Give the embodiment of the present invention.But, the present invention can realize in many different forms, however it is not limited to described herein
Embodiment.On the contrary, providing the purpose of these embodiments is to make to the disclosure more thoroughly comprehensively.
It should be noted that when element is referred to as " being fixedly arranged on " another element, and it can be directly on another element
Or element placed in the middle can also be there is.When an element is considered as " connection " another element, and it can be to be directly connected to
To another element or may be simultaneously present centering elements.Term as used herein " vertical ", " level ", " left ",
" right " and similar statement are for illustrative purposes only.
Unless otherwise defined, all of technology used herein and scientific terminology and the technical field belonging to the present invention
The implication that technical staff is generally understood that is identical.The term used the most in the description of the invention is intended merely to describe tool
The purpose of the embodiment of body, it is not intended that in limiting the present invention.Term as used herein " and/or " include one or more phase
Arbitrary and all of combination of the Listed Items closed.
Embodiment 1
Referring to Fig. 1 to Fig. 3, a kind of audio directional loudspeaker provided for first embodiment of the invention, including speaker
Base 2 below main body 1 and speaker body 1.Described base 2 is the metab thickeied so that it is have enough weight supports
Play whole audio directional loudspeaker.Base 2 is provided with through hole 21, and motor 3 is screwed the through hole 21 in base 2
In.Motor 3 is provided with and stretches out through hole 21, the rotating shaft 31 of upper end band gear, and the lower end of swingle 4 is socketed in rotating shaft 31,
The inner surface of the lower end of swingle 4 is provided with and the teeth groove of described gear matches.The upper end of swingle 4 is fixed on speaker body 1
Bottom, when motor 3 starts, drive rotating shaft 31 and swingle 4 to rotate, and then drive speaker body 1 to rotate.
It is provided with in speaker body 1 at ultrasound transducer array 11, controller 12, microphone assembly 13, acoustic signals
Reason unit 14 and orientation detection unit 15.Ultrasound transducer array 11 is arranged on the front panel of speaker body 1, by multiple super
The array of sonic transducer composition, for direction propagation audio signal.
Microphone assembly 13 is electrically connected with acoustic signals processing unit 14, is used for receiving acoustic signals, and by described sound
Ripple signal sends to acoustic signals processing unit 14.Microphone assembly 13 includes that 4 are inserted in ultrasound transducer array gap
Mike, 4 mike one linear microphone arrays of composition.The function neither affecting ultrasonic transducer battle array 11 nor affects on
The overall appearance of this audio speaker.
Acoustic signals processing unit 14 is poor according to the time of advent of described acoustic signals, determines the signal of described acoustic signals
The position in source, and the positional information of described signal source is sent to controller 12.
Orientation detection unit 15, for detection and to controller 12 send ultrasound transducer array towards azimuth information.
Controller 12 is electrically connected with motor 3, acoustic signals processing unit 14, orientation detection unit 15.This control
Device 12 for receive the positional information of described signal source and ultrasound transducer array 11 towards azimuth information, and according to receiving
Information determines that ultrasound transducer array 11 needs the direction rotated and angle and drive stepping motor 3 to work, and makes speaker master
Body 1 rotates corresponding angle.Guarantee ultrasound transducer array 11 towards orientation just to described signal source.
In the embodiment of the present invention, speaker body 1 being additionally provided with radio communication unit, client passes through radio communication unit
Audio signal is sent, it is achieved being wirelessly transferred and remotely control of audio signal to this audio speaker.This radio communication unit makes
Wireless communication mode be Zigbee, one in Z-Wave, bluetooth, Wifi and RF radio frequency.
The present embodiment obtains acoustic signals by microphone assembly, according to position and the ultrasonic transducer in acoustic signals source
Array current towards orientation, determine ultrasound transducer array need rotate direction and angle, drive stepping motor work then
Make, make speaker body rotate corresponding angle, it is ensured that institute's ultrasound transducer array is just signal to acoustic signals towards orientation
Source.
Ultrasound transducer array consistent with the direction of audio signal direction propagation towards orientation, audio signal all the time towards
The signal source of acoustic signals is propagated, it is achieved that the self-adapting steering of audio directional loudspeaker.When a part in one family environment
People needs to appreciate music, and another part people needs reading or during rest, the sound that audio directional loudspeaker is propagated all the time towards
Movable, send the part people of sound, for user for bring happier, more easily experience
Embodiment 2
Referring to Fig. 4, a kind of audio directional loudspeaker provided for second embodiment of the invention, it carries with first embodiment
The audio directional loudspeaker structure of confession is more or less the same, and difference is, the front panel of speaker body 1 is provided with 4 sides
Lobe unit 16, lays respectively at the corner of ultrasound transducer array 11.Each secondary lobe unit 16 includes at least one ultrasonic transducer,
The phase place of ultrasonic transducer of each secondary lobe unit 16, loudness are individually controlled, and being used for eliminating ultrasound transducer array 11 can
The acoustic beam secondary lobe that can produce.It should be noted that secondary lobe unit is not limited to 4, in other embodiments of the invention, secondary lobe list
Unit can arrange 8, lays respectively at corner and the centre on four limits of ultrasound transducer array.
In the present embodiment, four secondary lobe unit independent propagation audio signals, can pass through before audio directional loudspeaker dispatches from the factory
Tuning parameter regulates the phase place of the ultrasonic transducer of four secondary lobes, loudness, to eliminate because each ultrasonic transducer performance differs
Cause the acoustic beam secondary lobe caused, form more preferable directivity.
Embodiment 3
Refer to Fig. 5, provide the flow chart of a kind of audio directional loudspeaker forward method for third embodiment of the invention,
It is provided with ultrasound transducer array on described audio directional loudspeaker, described ultrasound transducer array is provided with for receiving sound
The microphone assembly of ripple signal, described method includes step S10～S40:
S10, processes described mike according to the difference algorithm time of advent (Time Difference of Arrival, TDOA)
The acoustic signals that assembly receives, determines the signal source location of described acoustic signals；
S20, calculates angle between the position towards orientation and described signal source that ultrasound transducer array is current；
S30, it is judged that whether described angle is zero, performs step S40, when the angle ranging from zero when described angle is not zero
Time go to step S10；
S40, ultrasound transducer array rotates described angle, makes described ultrasound transducer array towards orientation just to described letter
Number source.
This enforcement provides a kind of method that audio directional loudspeaker turns to, it is achieved the self adaptation of audio directional loudspeaker turns
To, make ultrasound transducer array towards orientation the most just signal source to acoustic signals.
Embodiment described above only have expressed embodiments of the present invention, and it describes more concrete and detailed, but can not
Therefore the restriction to the scope of the claims of the present invention it is interpreted as.It should be pointed out that, for the person of ordinary skill of the art,
Without departing from the inventive concept of the premise, it is also possible to make some deformation and improvement, these broadly fall into the protection model of the present invention
Enclose.Therefore, the protection domain of patent of the present invention should be as the criterion with claims.
Claims (9)
1. an audio directional loudspeaker, including speaker body and be located in speaker body, for direction propagation audio frequency believe
Number ultrasound transducer array, it is characterised in that be provided with base below described speaker body, described base be installed with stepping
Motor, described motor is connected by swingle with described speaker body, described speaker body be additionally provided with controller,
Microphone assembly, acoustic signals processing unit, orientation detection unit, wherein,
Described microphone assembly is electrically connected with described acoustic signals processing unit, is used for receiving acoustic signals, and by described sound
Ripple signal sends to described signal processing unit；
Described acoustic signals processing unit is poor according to the time of advent of described acoustic signals, determines the signal source of described acoustic signals
Position, and to described controller send described signal source positional information；
Described orientation detection unit, sends believing towards orientation of described ultrasound transducer array for detection with to described controller
Breath；
Described controller is electrically connected with described motor, acoustic signals processing unit and orientation detection unit, for basis
The positional information of described signal source and described ultrasound transducer array determine described ultrasound transducer array towards azimuth information
Need direction and the angle rotated, and drive described motor to work, make described ultrasound transducer array the most right towards orientation
Described signal source.
2. audio directional loudspeaker as claimed in claim 1, it is characterised in that be additionally provided with multiple in described speaker body
Secondary lobe unit, the plurality of secondary lobe unit is positioned at around described ultrasound transducer array, and each described secondary lobe unit includes at least
One ultrasonic transducer, the phase place of ultrasonic transducer of each described secondary lobe unit, loudness is individually controlled, and is used for eliminating super
The acoustic beam secondary lobe that acoustic transducer array produces.
3. audio directional loudspeaker as claimed in claim 2, it is characterised in that described secondary lobe unit arranges 4, lays respectively at
On four angles of described ultrasound transducer array.
4. audio directional loudspeaker as claimed in claim 1, it is characterised in that described microphone assembly includes multiple insertion institute
State the mike in ultrasound transducer array gap, multiple described mikes one linear microphone array of composition.
5. audio directional loudspeaker as claimed in claim 4, it is characterised in that described microphone assembly includes 4 mikes.
6. audio directional loudspeaker as claimed in claim 1, it is characterised in that be additionally provided with wireless in described speaker body
Communication unit, client sends audio signal by described radio communication unit to described audio speaker.
7. audio directional loudspeaker as claimed in claim 1, it is characterised in that described motor is provided with turning of band gear
Axle, the lower end of described swingle is socketed in described rotating shaft, and the inner surface of described lower end is provided with and the teeth groove of described gear matches,
The upper end of described swingle is fixed on the bottom of described speaker body.
8. an audio directional loudspeaker forward method, described audio directional loudspeaker is provided with ultrasound transducer array, its
Being characterised by, being provided with the microphone assembly for receiving acoustic signals in described ultrasound transducer array, described method includes:
The acoustic signals received according to microphone assembly described in TDOA algorithm process, determines the position of the signal source of described acoustic signals
Put；
Calculate the angle between the position towards orientation and described signal source that ultrasound transducer array is current；
Described ultrasound transducer array rotates described angle, makes described ultrasound transducer array towards orientation just to described signal
Source.
9. method as claimed in claim 8, it is characterised in that described ultrasound transducer array rotates described angle so that it is court
Just the step of described signal source is included to orientation:
Judge whether described angle is zero；
When described angle is not zero, described ultrasound transducer array rotates described angle so that it is towards orientation just to described letter
Number source.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610674620.2A CN106125771A (en) | 2016-08-16 | 2016-08-16 | Audio directional loudspeaker and forward method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610674620.2A CN106125771A (en) | 2016-08-16 | 2016-08-16 | Audio directional loudspeaker and forward method thereof |
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| CN201610674620.2A Pending CN106125771A (en) | 2016-08-16 | 2016-08-16 | Audio directional loudspeaker and forward method thereof |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107277699A (en) * | 2017-07-21 | 2017-10-20 | 歌尔科技有限公司 | A kind of sound pick-up method and device |
| WO2018210219A1 (en) * | 2017-05-18 | 2018-11-22 | 刘国华 | Device-facing human-computer interaction method and system |
| CN109965901A (en) * | 2019-03-28 | 2019-07-05 | 重庆市职业病防治院（重庆市第六人民医院） | Intelligent stethoscope system and its control method |
| CN110070709A (en) * | 2019-05-29 | 2019-07-30 | 杭州聚声科技有限公司 | A kind of pedestrian's street crossing orientation speech prompting system and its method |
| CN110460936A (en) * | 2019-09-09 | 2019-11-15 | 汉腾汽车有限公司 | A kind of transaudient control system of orientation and control method being integrated in wisdom radio car |
| CN112104928A (en) * | 2020-05-13 | 2020-12-18 | 苏州触达信息技术有限公司 | Intelligent sound box and method and system for controlling intelligent sound box |
| CN112752191A (en) * | 2019-10-31 | 2021-05-04 | 北京小米移动软件有限公司 | Audio acquisition method, device and storage medium |
| US11523211B2 (en) | 2021-01-18 | 2022-12-06 | Chengdu Institute Of Biology, Chinese Academy Of Sciences | Method and device for generating synthetic vortex sound field with more mode number |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110460936A (en) * | 2019-09-09 | 2019-11-15 | 汉腾汽车有限公司 | A kind of transaudient control system of orientation and control method being integrated in wisdom radio car |
| CN112752191A (en) * | 2019-10-31 | 2021-05-04 | 北京小米移动软件有限公司 | Audio acquisition method, device and storage medium |
| CN112104928A (en) * | 2020-05-13 | 2020-12-18 | 苏州触达信息技术有限公司 | Intelligent sound box and method and system for controlling intelligent sound box |
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| US11523211B2 (en) | 2021-01-18 | 2022-12-06 | Chengdu Institute Of Biology, Chinese Academy Of Sciences | Method and device for generating synthetic vortex sound field with more mode number |
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