CN106093848A - Sound orientation method and device - Google Patents
Sound orientation method and device Download PDFInfo
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- CN106093848A CN106093848A CN201610357472.1A CN201610357472A CN106093848A CN 106093848 A CN106093848 A CN 106093848A CN 201610357472 A CN201610357472 A CN 201610357472A CN 106093848 A CN106093848 A CN 106093848A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S3/00—Direction-finders for determining the direction from which infrasonic, sonic, ultrasonic, or electromagnetic waves, or particle emission, not having a directional significance, are being received
- G01S3/80—Direction-finders for determining the direction from which infrasonic, sonic, ultrasonic, or electromagnetic waves, or particle emission, not having a directional significance, are being received using ultrasonic, sonic or infrasonic waves
- G01S3/802—Systems for determining direction or deviation from predetermined direction
- G01S3/8027—By vectorial composition of signals received by plural, differently-oriented transducers
Abstract
The present invention provides a kind of sound orientation method and device, obtains the first two-way acoustic-electrical transducer, the acoustical signal sent by sound source to be oriented of the second two-way acoustic-electrical transducer collection respectively, and is designated as the first acoustical signal and second sound signal respectively；Obtain the angle angle between the first two-way acoustic-electrical transducer and the second two-way acoustic-electrical transducer；According to the first acoustical signal, second sound signal, angle angle and determine linear function, and the signal energy exported when determining and rotate each predetermined angle using the straight line at a two-way acoustic-electrical transducer place as reference line according to linear function by the predetermined angle of predetermined interval setting；The orientation angles at sound source place to be oriented is determined according to the signal energy in each predetermined angle.Compared to traditional method or device, the method and device without using the mode of the traditional linear array of Duo Ke omnidirectional acoustic-electrical transducer, L row array and square array to position, it is not necessary to calculating in a large number, its amount of calculation is little.
Description
Technical field
The present invention relates to audio signal processing technique field, particularly relate to a kind of sound orientation method and device.
Background technology
Along with rise and the development of the emerging industry such as Smart Home, intelligent toy, competing in order to improve in like product
Striving power, the developer of smart machine is constantly developed based on the New function of man-machine interaction or intelligent monitoring etc..At smart machine
On can recognize that the orientation of user and this made a response, it has also become a standard configuration function of smart machine.
At present, identify the orientation of user based on acoustics and typically use the linear array of many omnidirectional microphones, L row array
And square array.Microphone array use concrete grammar have: method based on Wave beam forming, method based on subspace and
The method estimated based on time delay, these microphone array algorithms have a problem in that operand is big.Therefore, cause utilizing these methods
The method or apparatus carrying out sound orientation there is also computationally intensive problem.
Summary of the invention
Based on this, it is necessary to provide the method and device of the sound orientation that a kind of amount of calculation is little.
A kind of sound orientation method, including:
Obtain the first two-way acoustic-electrical transducer, being sent by sound source to be oriented of the second two-way acoustic-electrical transducer collection respectively
Acoustical signal, and it is designated as the first acoustical signal and second sound signal respectively；
Obtain the angle angle between described first two-way acoustic-electrical transducer and described second two-way acoustic-electrical transducer；
According to described first acoustical signal, described second sound signal, described angle angle and by predetermined interval arrange
Predetermined angle determines linear function, and determines according to described linear function with the straight line at a described two-way acoustic-electrical transducer place
The signal energy of output when rotating each described predetermined angle as reference line；
According to the signal energy in predetermined angle each described determine described in the orientation angles at sound source place to be oriented.
A kind of sound directing device, including:
Two-way signaling acquisition module, for obtaining the first two-way acoustic-electrical transducer respectively, the second two-way acoustic-electrical transducer is adopted
The acoustical signal sent by sound source to be oriented of collection, and it is designated as the first acoustical signal and second sound signal respectively；
Angle angle acquisition module, is used for obtaining described first two-way acoustic-electrical transducer and described second two-way acoustic-electric transducing
Angle angle between device；
Angular energy determines module, for according to described first acoustical signal, described second sound signal, described angle angle
Degree and the predetermined angle arranged by predetermined interval determine linear function, and determine with one described two-way according to described linear function
The signal energy of output when the straight line at acoustic-electrical transducer place rotates each described predetermined angle as reference line；
Orientation angles determines module, treats orientation sound described in determining according to the signal energy in predetermined angle each described
The orientation angles at place, source.
Tut orientation method and device, owing to having only to obtain respectively the first two-way acoustic-electrical transducer, second two-way
The acoustical signal sent by sound source to be oriented of acoustic-electrical transducer collection, and it is designated as the first acoustical signal and rising tone message respectively
Number；Obtain the angle angle between described first two-way acoustic-electrical transducer and described second two-way acoustic-electrical transducer；Further according to institute
State the first acoustical signal, described second sound signal, described angle angle and determine line by the predetermined angle of predetermined interval setting
Property function, and according to described linear function determine using the straight line at a described two-way acoustic-electrical transducer place as reference line revolve
The signal energy of output when turning each described predetermined angle；Finally, determine according to the signal energy in predetermined angle each described
The orientation angles at described sound source place to be oriented.Compared to traditional method or device, traditional without using without the method and device
The mode of the linear array of Duo Ke omnidirectional acoustic-electrical transducer, L row array and square array position, it is not necessary to big gauge
Calculating, its amount of calculation is little.
Accompanying drawing explanation
Fig. 1 is the flow chart of the sound orientation method of an embodiment；
Fig. 2 is the particular flow sheet of a step of the sound orientation method of Fig. 1；
Fig. 3 is the relative position view of two two-way acoustic-electrical transducers；
Fig. 4 is the schematic diagram of the collected sound signal directivity of two two-way acoustic-electrical transducers；
Fig. 5 is the particular flow sheet of another step of the sound orientation method of Fig. 1；
Fig. 6 is the flow chart of the sound orientation method of another embodiment；
Fig. 7 is the function structure chart of the sound directing device of an embodiment；
Fig. 8 is the cellular construction figure of a module of Fig. 7；
Fig. 9 is the cellular construction figure of another module of Fig. 7.
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 preferred embodiment of the present invention.But, the present invention can realize in many different forms, however it is not limited to herein
Described embodiment.On the contrary, providing the purpose of these embodiments is to make the understanding to the disclosure more saturating
Thorough comprehensively.
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 " or/and " include one or more phase
Arbitrary and all of combination of the Listed Items closed.
As it is shown in figure 1, be the sound orientation method of one embodiment of the invention, including:
S110: respectively obtain the first two-way acoustic-electrical transducer, the second two-way acoustic-electrical transducer collection by sound source to be oriented
The acoustical signal sent, and it is designated as the first acoustical signal and second sound signal respectively.
The directivity of two-way acoustic-electrical transducer is 8 fonts, and the acoustic-electrical transducer of this directivity is the cleverest with reverse at forward
Quick the sensitiveest, the both direction vertical with positive and negative both direction is the sensitiveest, is i.e. mutually perpendicular to axial place straight line
The both direction at straight line place can not collect acoustical signal.It should be noted that two-way acoustic-electrical transducer cannot distinguish between and is
Forward or reverse acoustical signal.Therefore, in the present embodiment, changed by two two-way acoustic-electrics mutually forming angle angle
Energy device may be implemented in the orientation of 0～180 degree.
Straight line on the basis of the straight line at a two-way acoustic-electrical transducer place, i.e. with the axial place of two-way acoustic-electrical transducer
Straight line on the basis of the straight line in direction.Remember that this two-way acoustic-electrical transducer is the first two-way acoustic-electrical transducer, its acoustical signal gathered
It it is the first acoustical signal.Another two-way acoustic-electrical transducer is the second two-way acoustic-electrical transducer, and its acoustical signal gathered is the
Two acoustical signals.In the present embodiment, it is only necessary to realize the orientation at 0～180 degree, therefore, it can shield the second two-way acoustic-electric
The acoustical signal in one face of transducer.
Wherein in an embodiment, two-way acoustic-electrical transducer can be specially bi-directional microphones.
S130: obtain the angle angle between described first two-way acoustic-electrical transducer and described second two-way acoustic-electrical transducer
Degree.
Obtain the angle angle of two two-way acoustic-electrical transducers.This angle angle in the range of: more than 0 degree, less than 180
Degree.
S150: according to described first acoustical signal, described second sound signal, described angle angle and set by predetermined interval
The predetermined angle put determines linear function, and determines according to described linear function with a described two-way acoustic-electrical transducer place
The signal energy of output when straight line rotates each described predetermined angle as reference line.
Predetermined interval is a less angle, and predetermined interval is relevant to orientation precision to be reached, as can be 5 degree or
3 degree.The linear coefficient of linear function is determined according to angle angle and the predetermined angle that arranges by predetermined interval.
Wherein in an embodiment, linear function is the linear letter about the first acoustical signal and second sound signal
Number.First determine that according to linear function to rotate each using the straight line at the first two-way acoustic-electrical transducer place as reference line described pre-
If the acoustical signal of output, determines, further according to this acoustical signal, the signal energy that this acoustical signal is corresponding during angle.
In another embodiment, it is also possible to first calculate the first acoustical signal and the signal of second sound signal correspondence respectively
Energy, is designated as the first signal energy and secondary signal energy；Linear function is about the first signal energy and secondary signal energy
Linear function；Then determine further according to linear function and revolve as reference line using the straight line at the first two-way acoustic-electrical transducer place
The signal energy of output when turning each described predetermined angle.
Wherein in an embodiment, the first acoustical signal and the second sound signal of multiple time period can be obtained, the
The meansigma methods of the signal energy of the first acoustical signal that signal energy is multiple time period that one acoustical signal is corresponding；Second sound
The signal energy that signal is corresponding is the meansigma methods of multiple time period, second sound signal signal energy.So, location is improved
Accuracy.It is to be appreciated that meansigma methods here can also replace with root-mean-square.
S170: according to the signal energy in predetermined angle each described determine described in the azimuth at sound source place to be oriented
Degree.
Size according to the signal energy in predetermined angle each described, it may be determined that described in the side at sound source place to be oriented
Parallactic angle degree.The acoustical signal that can not receive due to the direction that two-way acoustic-electrical transducer axial direction is vertical, therefore, it can assert
The predetermined angle of signal energy minimum is the orientation angles at sound source place to be oriented and deducts or plus 90 degree, and this orientation angles
Between 0～180 degree.Due to the anglec of rotation that signal energy is minimum may not be in predetermined angle again, and be difficult to determine
The situation that signal energy is minimum, therefore, it can set a threshold value, when signal energy is equal to this threshold value, assert sound undetermined
The orientation angles at place, source is that the predetermined angle corresponding to this signal energy deducts or plus 90 degree, and this orientation angles 0～
Between 180 degree.
Tut orientation method, owing to having only to obtain the first two-way acoustic-electrical transducer respectively, the second two-way acoustic-electric changes
The acoustical signal sent by sound source to be oriented of energy device collection, and it is designated as the first acoustical signal and second sound signal respectively；Obtain
Take the angle angle between described first two-way acoustic-electrical transducer and described second two-way acoustic-electrical transducer；Further according to described first
Acoustical signal, described second sound signal, described angle angle and the predetermined angle arranged by predetermined interval determine linear function,
And determine that the straight line using a described two-way acoustic-electrical transducer place rotates each as reference line according to described linear function
The signal energy of output during described predetermined angle；Finally, according to the signal energy in predetermined angle each described determine described in treat
The orientation angles at orientation sound source place.Compared to traditional method, without the method without using traditional Duo Ke omnidirectional acoustic-electric transducing
The mode of the linear array of device, L row array and square array positions, it is not necessary to calculating in a large number, its amount of calculation is little.
As in figure 2 it is shown, wherein in an embodiment, described according to described first acoustical signal, described rising tone message
Number, described angle angle and the predetermined angle that arranges by predetermined interval, determine linear function, and according to described linear function with one
The straight line at individual described two-way acoustic-electrical transducer place rotates the step of the acoustical signal of each described predetermined angle as reference line
Suddenly, i.e. step S150, including:
S251: obtaining the predetermined angle arranged according to predetermined interval, described predetermined angle is with a described two-way acoustic-electric
The angle that the straight line at transducer place rotates counterclockwise as reference line.
Specifically, can obtain using the straight line at the first two-way acoustic-electrical transducer place as reference line according to predetermined interval
The described predetermined angle rotated counterclockwise.
S253: according to the linear system that described predetermined angle and described angle angle-determining are corresponding with described predetermined angle respectively
Number.
Owing to predetermined angle has multiple, it may be determined that multiple linear functions.Linear coefficient in different predetermined angle is different.
S255: calculate described first acoustical signal and the energy size of described second sound signal correspondence respectively, remember respectively
It is the first signal energy and secondary signal energy.
S257: according to described linear coefficient and described first signal energy, described secondary signal energy determine respectively with institute
State the described linear function that predetermined angle is corresponding.
S259: determine the signal energy in described predetermined angle according to described linear function.
In the present embodiment, described angle angle is 90 degree；The range intervals of predetermined angle be-90 degree～90 degree.So,
Make the signal energy in predetermined angle can be expressed as the linear function of the first signal energy and secondary signal energy.
Wherein in a specific embodiment, the first two-way acoustic-electrical transducer, the position of the second two-way acoustic-electrical transducer are closed
System's figure, as it is shown on figure 3, the angle angle between first two-way acoustic-electrical transducer the 310, second two-way acoustic-electrical transducer 330 is 90
Degree, i.e. first two-way acoustic-electrical transducer the 310, second two-way acoustic-electrical transducer 330 is mutually perpendicular to.First two-way acoustic-electrical transducer
310 acoustical signals that can gather the right and left, the second two-way acoustic-electrical transducer can gather the acoustical signal on upper and lower both sides.
As shown in Figure 4, straight line on the basis of the straight line at the first two-way acoustic-electrical transducer place, define this reference line for and
For the X-axis of coordinate system, the straight line at the second two-way acoustic-electrical transducer place is Y-axis.Now, the first two-way acoustic-electrical transducer points to 0
Degree, the first signal energy is designated as S1, and directivity is cos θ；Second two-way acoustic-electrical transducer is oriented to 90 degree, secondary signal energy
Being designated as S2, directivity is sin θ.First signal energy and secondary signal energy can by the linear superposition of linear coefficient (c1, c2)
Defeated as the two-way acoustic-electrical transducer after reference line different rotation angle with the straight line that obtains using the first acoustic-electrical transducer place
The signal energy gone out, is designated as Sa, is axially directed to α degree.Wherein, Sa is represented by about the first signal energy and secondary signal energy
Linear function:
Sa=c1*S1+c2*S2 (-1 < c1 < 1,0 < c2 < 1) (1)
Linear coefficient (c1, c2) computational methods needed for rotation alpha degree are counterclockwise:
C1=cos α；C2=sin α；Wherein, (-90 ° < α < 90 °).
In the present embodiment, owing to obtaining after linear coefficient (c1, c2) is substituted into (1):
Sa=cos (β-α) (2)
Therefore, Sa is represented by about the first signal energy and the linear function of secondary signal energy.
Predetermined intervalBy variable increment circulation obtain using the straight line at the first two-way acoustic-electrical transducer place as
Each predetermined angle that reference line rotates counterclockwise:
Wherein, α initial value is-90 degree, stops circulation (when overlapping, α is 0 degree) with reference line when α is 90 degree.
As it is shown in figure 5, wherein in an embodiment, described determine according to the signal energy in predetermined angle each described
The step of the orientation angles at described sound source place to be oriented, i.e. step S170, including:
S571: obtain the maximum in the signal energy in each described predetermined angle.
S573: determine signal ratio according to the signal energy in predetermined angle each described and described maximum.
S575: according to described signal ratio determine described in the orientation angles at sound source place to be oriented.
So, determine that the size of signal ratio is come by the signal energy in predetermined angle each described and described maximum
Determine the orientation angles of sound source to be oriented.
Further, described according to described signal ratio determine described in the step of orientation angles at sound source place to be oriented,
I.e. step S575, including:
(a), when described signal ratio minimum, determine that described orientation angles is the predetermined angle that described signal ratio is corresponding
Plus 90 degree.Or,
(b), when described signal ratio equal to predetermined threshold value time, determine that described orientation angles is that described signal ratio is corresponding
Predetermined angle adds or deducts, plus 90 degree, the threshold angle that described predetermined threshold value is corresponding, or determines that described orientation angles is each
Described predetermined threshold value pair is added or deducted to the individual predetermined angle corresponding equal to the described signal ratio of predetermined threshold value plus 90 degree
The meansigma methods of the threshold angle answered.
Wherein, predetermined threshold value is also relevant with orientation accuracy.As predetermined threshold value can be preset as 0.1 or the most pre-
It is set to other numerical value.
In the present embodiment, the range intervals of predetermined angle be-90 degree～90 degree, so, when described signal ratio minimum
Time, it may be determined that described orientation angles is that the predetermined angle that described signal ratio is corresponding adds 90 degree；When described signal ratio is equal to
During predetermined threshold value, if only existing such signal ratio, it may be determined that described orientation angles is that described signal ratio is corresponding
Predetermined angle adds or deducts, plus 90 degree, the threshold angle that described predetermined threshold value is corresponding；If there is multiple such signal ratio
Value, then can determine that described orientation angles is that the predetermined angle that described signal ratio is corresponding adds or deduct described pre-plus 90 degree
If the meansigma methods of the threshold angle that threshold value is corresponding.
Further, predetermined angle calculates all preset angle between-90～90 from-90 degree according to predetermined interval
Degree.If the signal energy in the most calculated described predetermined angle and the signal ratio of maximum are equal to pre-
If threshold value occurs prior to minima, described orientation angles is that the predetermined angle that described signal ratio is corresponding is added plus 90 degree
The threshold angle that described predetermined threshold value is corresponding.If the signal energy in described predetermined angle and the signal ratio of maximum are equal to pre-
If threshold value is later than minima when occurring, described orientation angles is that the predetermined angle that described signal ratio is corresponding deducts plus 90 degree again
The threshold angle that described predetermined threshold value is corresponding.
Wherein in a specific embodiment, the signal energy rotating predetermined angle is designated as E, and maximum is designated as Emax, root
Determine that signal ratio is E/Emax according to the signal energy in predetermined angle each described and described maximum.
When signal ratio obtains minima or reaches predetermined threshold value (threshold), orientation angles β can be by accordingly
Predetermined angle be calculated.Specifically,
(1) when meeting signal ratio E/Emax and obtaining minima:
β=α+90 (-90 ° < α < 90 °).
(2) when meeting signal ratio E/Emax equal to predetermined threshold value threshold (such as 0.1):
β 1=α+90+ γ E/Emax occurs prior to minima equal to threshold；Or
β 2=α+90-γ E/Emax is later than minima equal to threshold to be occurred.
Now, orientation angles β be β 1, average mean (β 1, β 2) of β 2 or β 1 and β 2；Wherein, γ is two-way acoustic-electric transducing
Differential seat angle between when device directivity is threshold and when directivity is minima.
As described in Figure 6, wherein in an embodiment, step S110～the most corresponding step S610 of S170～S670.Institute
State according to the signal energy in predetermined angle each described determine described in the step of orientation angles at sound source place to be oriented, i.e.
S670, afterwards, also includes:
S680: obtain the signal energy in the described predetermined angle that described orientation angles is corresponding.
S690: obtain omnidirectional signal energy, described omnidirectional signal energy is the acoustical signal that omnidirectional's acoustic-electrical transducer gathers
Corresponding energy size.The intersection point of described omnidirectional acoustic-electrical transducer and two described two-way acoustic-electrical transducers overlaps.
Specifically, the step obtaining omnidirectional signal energy may include that the sound letter obtaining omnidirectional's acoustic-electrical transducer collection
Number, it is designated as omnidirectional's acoustical signal；Omnidirectional signal energy is calculated according to omnidirectional's acoustical signal.
S6A0: according to the signal energy in the described predetermined angle that described orientation angles is corresponding and described omnidirectional signal energy
Amount, determine described in the final bearing degree of sound source to be oriented.
In the present embodiment, two faces of the first two-way acoustic-electrical transducer and the second two-way acoustic-electrical transducer all gather sound
Signal.Now, on the basis of previous embodiment, may determine that the straight line at the place, orientation of sound source to be oriented, and not can determine that
The end is at the front of the first two-way acoustic-electrical transducer or reverse side.Therefore, it is also desirable to obtain omnidirectional signal energy, undetermined to determine
To the final bearing degree of sound source, so, it is possible to achieve treat orientation sound source orientation in the range of 0～360 degree.
Specifically, the signal energy in the described predetermined angle that orientation angles is corresponding and described omnidirectional signal energy can be passed through
Amount is added and subtracts each other and respectively obtains sum signal energy and subtracted signal energy；Further according to sum signal energy and subtracted signal energy
The size of amount may determine that sound source to be oriented is at the front of the first two-way acoustic-electrical transducer or reverse side, so that it is determined that finally side
Parallactic angle degree.
Wherein in a specific embodiment, sum signal energy Sc1 represents, subtracted signal energy Sc2 represents；Then
Sc1=Sa+S3；Sc2=Sa-S3.According to sum signal energy and the size of subtracted signal energy and the scope of predetermined angle, can
Specifically to determine the quadrant at sound source place to be oriented.Finally, according to the quadrant at sound source place to be oriented, in conjunction with orientation angles can
To determine that final bearing degree is equal to orientation angles, or orientation angles adds or deducts 180 degree.Its concrete value is by treating orientation sound
The quadrant at place, source determines.
Specifically, when-90 °,<when α<0 °, if Sc1>Sc2, sound source to be oriented is in fourth quadrant；If Sc1 < Sc2, then treat
Orientation sound source is at the second quadrant.When 0 °,<when α<90 °, if Sc1>Sc2, sound source to be oriented is at first quartile；If Sc1 < Sc2, treat
Orientation sound source is at third quadrant.
As it is shown in fig. 7, the present invention also provides for the device corresponding with tut orientation method.A kind of sound directing device,
Including:
Two-way signaling acquisition module 710, for obtaining the first two-way acoustic-electrical transducer, the second two-way acoustic-electrical transducer respectively
The acoustical signal sent by sound source to be oriented gathered, and it is designated as the first acoustical signal and second sound signal respectively；
Angle angle acquisition module 730, is used for obtaining described first two-way acoustic-electrical transducer and described second two-way acoustic-electric
Angle angle between transducer；
Angular energy determines module 750, for according to described first acoustical signal, described second sound signal, described folder
Angle angle and the predetermined angle arranged by predetermined interval determine linear function, and determine according to described linear function with described in one
The signal energy of output when the straight line at two-way acoustic-electrical transducer place rotates each described predetermined angle as reference line；
Orientation angles determines module 770, described undetermined for determining according to the signal energy in predetermined angle each described
Orientation angles to sound source place.
Tut orienting device, owing to having only to obtain the first two-way acoustic-electrical transducer respectively, the second two-way acoustic-electric changes
The acoustical signal sent by sound source to be oriented of energy device collection, and it is designated as the first acoustical signal and second sound signal respectively；Obtain
Take the angle angle between described first two-way acoustic-electrical transducer and described second two-way acoustic-electrical transducer；Further according to described first
Acoustical signal, described second sound signal, described angle angle and the predetermined angle arranged by predetermined interval determine linear function,
And determine that the straight line using a described two-way acoustic-electrical transducer place rotates each as reference line according to described linear function
The signal energy of output during described predetermined angle；Finally, according to the signal energy in predetermined angle each described determine described in treat
The orientation angles at orientation sound source place.Compared to traditional method or device, without this device without using traditional Duo Ke omnidirectional sound
The mode of the linear array of electric transducer, L row array and square array positions, it is not necessary to calculate in a large number, its amount of calculation
Little；And the length of this device or volume less.
Referring in Fig. 8 embodiment wherein, described angular energy determines that module includes:
Predetermined angle acquiring unit 851, for obtaining the predetermined angle arranged according to predetermined interval, described predetermined angle is
The angle rotated as reference line using the straight line at a described two-way acoustic-electrical transducer place；
Linear coefficient determines unit 853, for according to described predetermined angle and described angle angle-determining respectively with described
The linear coefficient that predetermined angle is corresponding；
Bidirectional energy computing unit 855, is used for calculating described first acoustical signal and described second sound signal is the most right
The energy size answered, is designated as the first signal energy and secondary signal energy respectively；
Linear function determines unit 857, for according to described linear coefficient and described first signal energy, described second letter
Number energy determines described linear function corresponding with described predetermined angle respectively；
Signal energy determines unit 859, for determining the signal energy in described predetermined angle according to described linear function.
Please participate in Fig. 9 embodiment wherein, described orientation angles determines that module includes:
Ceiling capacity acquiring unit 971, for obtaining the maximum in the signal energy in each described predetermined angle；
Signal ratio determines unit 973, for according to the signal energy in predetermined angle each described and described maximum
Determine signal ratio；
Orientation angles determines unit 975, the orientation at sound source place to be oriented described in determine according to described signal ratio
Angle.
Wherein in an embodiment, described orientation angles determines unit, including:
Minima subunit, for when described signal ratio minimum, determines that described orientation angles is described signal ratio
The predetermined angle of value correspondence is plus 90 degree；Or,
Predetermined threshold value subunit, for when described signal ratio is equal to predetermined threshold value, determining that described orientation angles is
The predetermined angle that described signal ratio is corresponding adds or deducts, plus 90 degree, the threshold angle that described predetermined threshold value is corresponding.
Please continue to refer to Fig. 7, wherein in an embodiment, also include:
Orientation energy harvesting module 780, for obtaining the signal energy in the described predetermined angle that described orientation angles is corresponding
Amount；
Omnidirectional's energy harvesting module 790, is used for obtaining omnidirectional signal energy, and described omnidirectional signal energy is that omnidirectional's acoustic-electric changes
Can energy size corresponding to acoustical signal that gather of device；Described omnidirectional acoustic-electrical transducer and two described two-way acoustic-electrical transducers
Intersection point overlaps；
Final orientation determines module 7A0, the signal energy in the described predetermined angle corresponding according to described orientation angles
Amount and described omnidirectional signal energy, determine described in the final bearing degree of sound source to be oriented.
Owing to tut orienting device is corresponding with sound orientation method, for saving length, therefore detailed description of the invention is no longer
Repeat.
Above example only have expressed the several 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 multiple 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 (10)
1. a sound orientation method, it is characterised in that including:
Obtain the first two-way acoustic-electrical transducer, the sound sent by sound source to be oriented of the second two-way acoustic-electrical transducer collection respectively
Signal, and it is designated as the first acoustical signal and second sound signal respectively；
Obtain the angle angle between described first two-way acoustic-electrical transducer and described second two-way acoustic-electrical transducer；
According to described first acoustical signal, described second sound signal, described angle angle and presetting by predetermined interval setting
Angle-determining linear function, and according to described linear function determine using the straight line at a described two-way acoustic-electrical transducer place as
The signal energy of output when reference line rotates each described predetermined angle；
According to the signal energy in predetermined angle each described determine described in the orientation angles at sound source place to be oriented.
Sound orientation method the most according to claim 1, it is characterised in that described according to described first acoustical signal, institute
State second sound signal, described angle angle and the predetermined angle arranged by predetermined interval, determine linear function, and according to described
Linear function rotates each described predetermined angle using the straight line at a described two-way acoustic-electrical transducer place as reference line
The step of acoustical signal, including:
Obtaining the predetermined angle arranged according to predetermined interval, described predetermined angle is with a described two-way acoustic-electrical transducer place
The angle that rotates as reference line of straight line；
According to the linear coefficient that described predetermined angle and described angle angle-determining are corresponding with described predetermined angle respectively；
Calculate described first acoustical signal and the energy size of described second sound signal correspondence respectively, be designated as the first signal respectively
Energy and secondary signal energy；
According to described linear coefficient and described first signal energy, described secondary signal energy determine respectively with described predetermined angle
Corresponding described linear function；
The signal energy in described predetermined angle is determined according to described linear function.
Sound orientation method the most according to claim 1, it is characterised in that described according in predetermined angle each described
Signal energy determine described in the step of orientation angles at sound source place to be oriented include:
Obtain the maximum in the signal energy in each described predetermined angle；
Signal ratio is determined according to the signal energy in predetermined angle each described and described maximum；
According to described signal ratio determine described in the orientation angles at sound source place to be oriented.
Sound orientation method the most according to claim 3, it is characterised in that described determine according to described signal ratio described
The step of the orientation angles at sound source place to be oriented, including:
When described signal ratio minimum, determine that described orientation angles is that the predetermined angle that described signal ratio is corresponding adds 90
Degree；Or,
When described signal ratio is equal to predetermined threshold value, determine that described orientation angles is the predetermined angle that described signal ratio is corresponding
Add or deduct, plus 90 degree, the threshold angle that described predetermined threshold value is corresponding, or it is pre-to determine that described orientation angles is that each is equal to
If the predetermined angle that the described signal ratio of threshold value is corresponding adds or deducts, plus 90 degree, the threshold value that described predetermined threshold value is corresponding
The meansigma methods of angle.
Sound orientation method the most according to claim 1, it is characterised in that described according in predetermined angle each described
Signal energy determine described in sound source place to be oriented orientation angles step after, also include:
Obtain the signal energy in the described predetermined angle that described orientation angles is corresponding；
Obtaining omnidirectional signal energy, described omnidirectional signal energy is the energy that acoustical signal that omnidirectional acoustic-electrical transducer gathers is corresponding
Size；The intersection point of described omnidirectional acoustic-electrical transducer and two described two-way acoustic-electrical transducers overlaps；
According to the signal energy in the described predetermined angle that described orientation angles is corresponding and described omnidirectional signal energy, determine described
The final bearing degree of sound source to be oriented.
6. a sound directing device, it is characterised in that including:
Two-way signaling acquisition module, for obtaining the first two-way acoustic-electrical transducer respectively, the second two-way acoustic-electrical transducer gathers
The acoustical signal sent by sound source to be oriented, and it is designated as the first acoustical signal and second sound signal respectively；
Angle angle acquisition module, be used for obtaining described first two-way acoustic-electrical transducer and described second two-way acoustic-electrical transducer it
Between angle angle；
Angular energy determines module, for according to described first acoustical signal, described second sound signal, described angle angle and
The predetermined angle arranged by predetermined interval determines linear function, and determines according to described linear function with a described two-way acoustic-electric
The signal energy of output when the straight line at transducer place rotates each described predetermined angle as reference line；
Orientation angles determines module, for according to the signal energy in predetermined angle each described determine described in sound source institute to be oriented
Orientation angles.
Sound directing device the most according to claim 6, it is characterised in that described angular energy determines module, including:
Predetermined angle acquiring unit, for obtaining the predetermined angle arranged according to predetermined interval, described predetermined angle is with one
The angle that the straight line at described two-way acoustic-electrical transducer place rotates as reference line；
Linear coefficient determines unit, for according to described predetermined angle and described angle angle-determining respectively with described predetermined angle
Corresponding linear coefficient；
Bidirectional energy computing unit, for calculating described first acoustical signal and the energy of described second sound signal correspondence respectively
Size, is designated as the first signal energy and secondary signal energy respectively；
Linear function determines unit, for according to described linear coefficient and described first signal energy, described secondary signal energy
Determine described linear function corresponding with described predetermined angle respectively；
Signal energy determines unit, for determining the signal energy in described predetermined angle according to described linear function.
Sound directing device the most according to claim 6, it is characterised in that described orientation angles determines that module includes:
Ceiling capacity acquiring unit, for obtaining the maximum in the signal energy in each described predetermined angle；
Signal ratio determines unit, for determining signal according to the signal energy in predetermined angle each described and described maximum
Ratio；
Orientation angles determines unit, the orientation angles at sound source place to be oriented described in determine according to described signal ratio.
Sound directing device the most according to claim 8, it is characterised in that described orientation angles determines unit, including:
Minima subunit, for when described signal ratio minimum, determines that described orientation angles is described signal ratio pair
The predetermined angle answered adds 90 degree；Or,
Predetermined threshold value subunit, for when described signal ratio is equal to predetermined threshold value, determining that described orientation angles is described
The predetermined angle that signal ratio is corresponding adds or deducts, plus 90 degree, the threshold angle that described predetermined threshold value is corresponding, or determines institute
Stating orientation angles is that each is equal to predetermined angle corresponding to the described signal ratio of predetermined threshold value and adds plus 90 degree or deduct
The meansigma methods of the threshold angle that described predetermined threshold value is corresponding.
Sound directing device the most according to claim 6, it is characterised in that also include:
Orientation energy harvesting module, for obtaining the signal energy in the described predetermined angle that described orientation angles is corresponding；
Omnidirectional's energy harvesting module, is used for obtaining omnidirectional signal energy, and described omnidirectional signal energy is that omnidirectional's acoustic-electrical transducer is adopted
The energy size corresponding to acoustical signal of collection；Described omnidirectional acoustic-electrical transducer and the intersection point weight of two described two-way acoustic-electrical transducers
Close；
Final orientation determines module, and the signal energy in the described predetermined angle corresponding according to described orientation angles is with described
Omnidirectional signal energy, determine described in the final bearing degree of sound source to be oriented.
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