CN103873981B - Audio regulation method and Acoustic processing apparatus - Google Patents
Audio regulation method and Acoustic processing apparatus Download PDFInfo
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Abstract
The invention discloses a kind of audio regulation method and Acoustic processing apparatus.Acoustic processing apparatus is electrically connected to microphone and loudspeaker, comprising：Input block, storage element, arithmetic element, adjustment unit, and output unit.Audio regulation method comprises the steps of：Feedback audio is received from microphone；According to feedback audio, the remaining audio that prestores and payment parameter, computing draws this remaining audio；One correlation operation is carried out to the feedback audio and the remaining audio that prestores；The selectively modified adjustment class interval to the payment parameter according to the result of the correlation operation；And this remaining audio is exported to the loudspeaker.
Description
Technical field
The invention relates to the method for adjustment of device and audio at a kind of audio regulation method and acoustics, and particularly
Device in being related at a kind of the adjustment class interval audio regulation method and acoustics of selectivity adjustment payment parameter.
Background technology
Microphone play system is the equipment that modern society is commonly used, but anti-between microphone element and loudspeaker
Phenomenon is presented, but often disturbs the result of broadcast of microphone play system.
Fig. 1 is referred to, it is the schematic diagram of the microphone loudspeaking system of prior art.Microphone loudspeaking system contains wheat
Can wind and loudspeaker, user 11 send " 1,2,3... " sound, can first with the radio reception of microphone 13 after, it is put
Greatly, played again by loudspeaker 15 afterwards.
However, microphone 13, when receiving sound, loudspeaker 15 is also playing sound simultaneously, and this is played by loudspeaker 15
Sound can also be received by microphone 13.That is, the feedback audio that microphone 13 is received contains two groups of sound,
I.e.：The target audio that user 11 sends, and the background audio that loudspeaker 15 is sent.
The behavior of such a " receive, amplify, playing, receiving, amplifying, playing ... ", feedback acoustically will be formed
(Acoustic Feedback) be not with restraining.When feedback phenomenon produces, loudspeaker it is relatively easy therefore and produce damage, make
User and listener can not feel well because of " howl sound (Howling) " caused by acoustic feedback yet.
Therefore, a kind of practice of prior art is from the low microphone of radio reception susceptibility, avoids microphone from receiving non-make
The background audio that user sends.However, such a practice causes microphone to be only capable of receiving sound caused by short distance.In other words,
Although such a practice is avoided that the problem of acoustic feedback and howl sound, but microphone is but only capable of being arranged near user's mouth.
That is, during the susceptibility of simple reduction microphone, can derive must be by microphone in a manner of hand-held, neck is hung or worn in head
The inconvenience such as use.Further, since the position of microphone must be close to the mouth of sounder, therefore the easily spittle of residual user
And saliva, and produce the doubt of health.
The another kind of prior art is to turn the volume of loudspeaker down as rule, or by microphone away from loudspeaker.This
The purpose of two kinds of practices be reduce loudspeaker caused by radio reception of the sound to microphone interfere, but the volume quilt of loudspeaker
Turn down, the volume that amplifies for representing loudspeaker is limited.In addition, the position of loudspeaker also not necessarily can arbitrarily be moved.
Therefore, the feedback problem of microphone loudspeaking system is still a urgent problem to be solved.
The content of the invention
To solve the above mentioned problem of prior art, the invention provides device at a kind of audio regulation method and acoustics.
The invention provides a kind of audio regulation method, applied to the acoustics electrically connected with a microphone, a loudspeaker
Processing unit, the method for adjustment comprise the steps of：A feedback audio is received from the microphone；According to the feedback audio, one pre-
Deposit remaining audio with one payment parameter and computing draws this remaining audio；The feedback audio and the remaining audio that prestores are entered
The correlation operation of row one；The selectively modified adjustment class interval to the payment parameter according to the result of the correlation operation；And
This remaining audio is exported to the loudspeaker.
Present invention also offers a kind of Acoustic processing apparatus, is electrically connected to a microphone and a loudspeaker, comprising：One input
Unit, it receives a feedback audio from the microphone；One storage element, its store one prestore remaining audio with one payment parameter；
One arithmetic element, the input block and the storage element are electrically connected to, it is according to the feedback audio, the remaining audio that prestores with being somebody's turn to do
Payment parameter and computing draws this remaining audio, and to the feedback audio and one correlation of remaining audio progress that prestores
Computing；One adjustment unit, is electrically connected to the arithmetic element, its result according to the correlation operation and selectively modified this is supported
Sell the adjustment class interval of parameter；And an output unit, the arithmetic element is electrically connected to, it is by this remaining audio output to should
Loudspeaker.
More preferably understand to have to the above-mentioned and other aspect of the present invention, special embodiment below, and coordinate institute's accompanying drawing
Formula, it is described in detail below：
Brief description of the drawings
Fig. 1 is the schematic diagram of the microphone loudspeaking system of prior art.
Fig. 2 is the block diagram that the Acoustic processing apparatus of the embodiment of the present invention is applied to microphone system.
Fig. 3 is the embodiment of the present invention, the flow chart applied to the audio regulation method of Acoustic processing apparatus.
Fig. 4 is the schematic diagram that the Acoustic processing apparatus of the present invention carries out Fig. 3 step S33.
Fig. 5 is the schematic diagram that the Acoustic processing apparatus of the present invention carries out the step S35 of the 3rd figure.
Fig. 6 is that the Acoustic processing apparatus of the present invention carries out the schematic diagram of adaptive adjustment.
Fig. 7 is the flow chart that adaptive adjustment is carried out using adjustment unit.
Fig. 8 is to illustrate to compare feedback audio, the comparison schematic diagram of time point t (n-1) and time point t (n) this remaining audio.
Wherein, description of reference numerals is as follows：
User：11
Microphone：13、23
Loudspeaker：15、25
Acoustic processing apparatus：27
Storage element：271
Arithmetic element：273
Adjustment unit：275
Input block：277
Output unit：279
Embodiment
As it was previously stated, microphone in radio reception, can receive the target audio that user is sent simultaneously, and by raising one's voice
The background audio that device is sent.Therefore, the present invention proposes a kind of practice, using Acoustic processing apparatus to received by microphone
After feedback audio is handled, by this remaining audio output to loudspeaker.This remaining audio is according to feedback audio, prestored
Remaining audio and payment parameter and result that computing is drawn, accordingly, loudspeaker can significantly change when playing this remaining audio
The phenomenon of kind howl sound.
Fig. 2 is referred to, the Acoustic processing apparatus of the embodiment of the present invention is applied to the block diagram of microphone loudspeaking system by it.
The Acoustic processing apparatus 27 of this embodiment is electrically connected in microphone 23 with raising by input block 277 and output unit 279
Sound device 25.
In addition, Acoustic processing apparatus 27 further comprises storage element 271, arithmetic element 273 and adjustment unit 275, wherein
Arithmetic element 273 is electrically connected to input block 277, output unit 279, storage element 271 and adjustment unit 275.
Fig. 3 is referred to, it is the flow chart for the audio regulation method that the embodiment of the present invention is applied to Acoustic processing apparatus.
First feedback audio (step S31) is received from microphone.That is, when user uses microphone 23, microphone 23
What can be continued receives the feedback audio F for containing target audio and background audio.When user persistently uses microphone loudspeaking
During system, Acoustic processing apparatus 27 feeds back audio F using input block 277 from the lasting reception of microphone 23.
Then, Acoustic processing apparatus can using storage element, arithmetic element, adjustment unit and to feed back audio F bags
S33 containing step, S35, S37 acoustic echo eliminate (acoustic echo cancellation, referred to as AEC).
Carry out acoustic echo elimination when, Acoustic processing apparatus according to feedback audio, the remaining audio that prestores with payment parameter and
Computing draws this remaining audio (step S33)；Acoustic processing apparatus is also carried out to feedback audio and the remaining audio that prestores in addition
Correlation operation (step S35)；And the selectively modified payment parameter (step S37) according to the result of correlation operation.
Further, step S37 is comprised the steps of：Judge whether the result of correlation operation meets preparatory condition
(step S371)；When the result of correlation operation does not meet preparatory condition, the adjustment class interval (step to offseting parameter is maintained
S375)；And when the result of correlation operation meets preparatory condition, payment parameter is changed by adaptive adjustment flow
Adjustment class interval (step S373).
Such as：Correlation operation result is more than or equal to 0.7 situation by step S371, is considered as and meets preparatory condition.Instead
It, when correlation operation result is less than 0.7, is then considered as and does not meet preparatory condition.
Flow is eliminated by the acoustic echo of the present invention, Acoustic processing apparatus 27 is first reduced in audio F is fed back, is not belonging to
The composition of target audio.That is, the feedback audio F received is not directly supplied to loudspeaker 25, changes to draw after treatment
This remaining audio Rnew is supplied to loudspeaker 25.That is, this remaining audio Rnew can be provided by output unit 279
Played (step S39) to loudspeaker 25.
After adjustment of the present invention to playing audio, this remaining audio Rnew for actually drawing self feed back audio
The composition of the background audio of the overwhelming majority is deducted in F, thus can be greatly improved howl sound phenomenon.Embodiments of the invention are only
Need about 20ms to complete Fig. 3 flow, thus adjustment quickly can be carried out to feedback audio.
How acoustic echo elimination is carried out to feedback audio F on Acoustic processing apparatus 27, and then draw this remaining sound
Frequency Rnew details, please referring further to the explanation to subsequent drawings.
Fig. 4 is referred to, it carries out Fig. 3 step S33 schematic diagram for the Acoustic processing apparatus of the present invention.
First, storage element 271 provides and prestores remaining audio Rold to arithmetic element 273；Input block 277 then provides instead
Audio F is presented to arithmetic element 273.
Wherein, prestore remaining audio Rold equivalent to it is preceding once carry out audio adjustment when, drawn by arithmetic element this
Remaining audio Rnew.Such as：This remaining audio Rnew that t (n-1) is drawn is used to the remaining audio that prestores as t (n)
Rold；This remaining audio Rnew that t (n) is drawn is used to the remaining audio Rold that prestores as t (n+1), and the rest may be inferred by analogy for it.
Then, arithmetic element 273 will according to feedback audio F, prestore remaining audio Rold with offset parameter s and computing is drawn
This remaining audio Rnew.Such as：
This remaining audio Rnew=feedback audio F- (payment parameter s* prestore remaining audio Rold) .. formulas 1
After the computing of arithmetic element 273 draws this remaining audio Rnew, this remaining audio Rnew is transferred to output
Unit 279, used as the broadcasting for providing loudspeaker.
Furthermore Acoustic processing apparatus can utilize this remaining audio Rnew and update the remnants that prestore in storage element 271
Audio Rold value.That is, Rold, wherein Rold'=Rnew are updated with Rold'.
Fig. 5 is referred to, it carries out Fig. 3 step S35 schematic diagram for the Acoustic processing apparatus of the present invention.
What arithmetic element 273 was provided storage element 271 prestore remaining audio Rold, and input block 277 are carried
The feedback audio F of confession carries out correlation operation.
The correlation operation that arithmetic element 273 is carried out refers to：According to shaking for the feedback audio F and remaining audio Rold that prestores
Amplitude variation, frequency spectrum reaction, voice print database etc. and judge both correlation.In general, correlation operation result Cor_rlt will
Between -1 ~ 1, wherein -1 represents negative correlation, and+1 represents positive correlation.
By in correlation operation result, absolute value is defined as meeting default bar embodiments of the invention up to more than 0.7 person
Part.Certainly, preparatory condition and need not be defined as correlation operation result absolute value be more than or equal to 0.7 situation.Such as：
In field of acoustics, generally by the absolute value of correlation operation result be less than 0.3 person as lower correlation.Therefore, bar is preset
Part can also refer to situation of the absolute value more than or equal to 0.3 of correlation operation result.
After arithmetic element 273 carries out correlation operation to feedback audio F and the remaining audio Rold that prestores, further by phase
The result Cor_rlt of closing property computing sends adjustment unit 275 to.
Fig. 6 is referred to, it carries out the schematic diagram of adaptive adjustment for the Acoustic processing apparatus of the present invention.
The present invention stores in storage element 271 and offsets parameter s, and at the audio adjustment according to previous time point
This remaining parameter Rnew of the sheet managed and drawn (as this remaining audio Rold that prestores).In addition, arithmetic element 273 also provides
Correlation operation result Cor_rlt is to arithmetic element 273.
It is and pre- according to formula 1 it is known that this remaining audio Rnew size depends on feedback audio F, payment parameter s
Deposit remaining audio Rold.Wherein, the size for feeding back audio F and the remaining audio Rold that prestores is set numerical value, if to adjust
During this remaining audio Rnew, it is only capable of reaching by way of to payment parameter s adjustment.
Therefore, after adjustment unit 275 obtains correlation operation result Cor_rlt by arithmetic element 273, will determine that first
Whether correlation operation result Cor_rlt meets preparatory condition (whether the absolute value of correlation operation result is more than or equal to 0.7),
And adjustment unit 275 can be according to correlation operation result Cor_rlt, selection sexually revises adjustment payment parameter (s->S' mode).
A kind of situation is：When correlation operation result Cor_rlt does not meet preparatory condition, represent feedback audio F with it is pre-
The correlation for depositing remaining audio Rold is not high, i.e. the remaining audio Rold that prestores is relatively low to the influence degree for feeding back audio F.Cause
This, adjustment unit 275 in this case, will maintain payment parameter s adjustment mode.
Another situation is then：When correlation operation result Cor_rlt meets preparatory condition, represent feedback audio F with
Prestore remaining audio Rold correlation it is higher, and the remaining audio that prestores of higher proportion in audio F is fed back, should be deducted
Rold。
For purposes of illustration only, this sentences time point t (n-1) and illustrates why adjustment unit needs feeding back exemplified by time point t (n)
In the case that the audio F and remaining audio Rold that prestores correlation is higher, to this remaining audio in a manner of adaptive adjustment
Rnew is adjusted.
First, time point t (n-1) this remaining audio Rnew can be used to the remaining audio that prestores as time point t (n)
Rold, time point can influence time point t (n) this remnants plus t (n) the remaining audio Rold that prestores with offseting parameter s product
Audio Rnew.
In order that time point t (n), when calculating this remaining audio Rnew, reduction wherein prestores remaining audio Rold to feedback
Audio F influence, therefore adjust payment parameter s prior to time point t (n-1).
If in short, at t (n-1), it is found that feedback audio F and the remaining audio Rold that prestores correlation are higher, this
The method of adjustment of invention can be by the flow of adaptive adjustment, and that pulls over offsets parameter s adjustment class interval by changing, and to not
This remaining audio Rnew for carrying out time point is adjusted.
Then adjustment unit 275 is illustrated how when the correlation for feeding back audio F and the remaining audio Rold that prestores is high, adjustment
Offset parameter s class interval, and related renewal payment parameter s value.
Fig. 7 is referred to, it is the flow chart that adaptive adjustment is carried out using adjustment unit.
The mode that the adjustment unit 275 of the present invention is updated to the adjustment class interval for offseting parameter s is as described below：
First, the reference multiplying power m (step S41) the remaining audio Rold that prestores being multiplied by between 0 ~ 1.It incite somebody to action both herein
The result of multiplication is defined as reference audio E, as shown in Equation 2.
Reference audio E=(the remaining audio Rold* that prestores refers to multiplying power m) ... .. formulas 2
Secondly, this remaining audio Rnew and reference audio E size (step S43) are compared.Then, it is remaining according to this
Audio Rnew and reference audio E comparative result, and adjust the adjustment class interval to offseting parameter s.
In short, (Rnew when if this remaining audio Rnew is more than reference audio E>E), adjustment unit just amplifies to payment
Adjustment class interval (step S44) of parameter；And if (Rnew when this remaining audio Rnew is less than reference audio E<E), adjustment list
Member just reduces adjustment class interval (step S45) to offseting parameter.
Comparative result on adjustment unit 275 according to this remaining audio Rnew and reference audio E, and adjust to payment
The detailed practice and basis for estimation of parameter s adjustment class interval, please referring further to Fig. 8 explanation.
Fig. 8 is referred to, it is to illustrate to compare feedback audio, the ratio of time point t (n-1) and time point t (n) this remaining audio
Compared with schematic diagram.
Fig. 8 first row represents the feedback audio F that input block is supplied to by microphone.In general, identical user
The volume for holding microphone talk is not very big drop.Therefore, microphone continue for some time it is interior received anti-
Presenting audio F will be roughly equal.The present invention can will feed back audio F size as a comparison other, thus Fig. 8 respectively arrange it is complete
Length is isometric with first row.
In this schema, secondary series represent this remaining audio Rnew at time point t (n-1) equivalent to：By feedback sound
Frequency F deducts the result after products of time point t (n-1) the remaining audio Rold that prestores with offseting parameter s.
Fig. 8 secondary series also illustrates how to be used as reference audio E by the use of time point t (n-1) this remaining audio Rnew.For
It is easy to compare, it is assumed herein that be 1 with reference to multiplying power m, therefore for time point t (n), the reference audio E=remaining audio Rold that prestores=
Time point t (n-1) this remaining audio Rnew.
According to formula 1, Rnew=F- (s*Rold), Fig. 8 secondary series represent this remnants calculated in time point t (n-1)
Audio Rnew.
According to preceding description it is known that this remaining audio Rnew that time point t (n-1) is calculated can be recorded in storage
The inside of memory cell 271, the remaining audio Rold that prestores as time point t (n).Therefore, this sentences arrows and gone out in time point t (n-
1) this remaining audio Rnew how the situation being used further in time point t (n).
Then, represented with Fig. 8 the 3rd row in time point t (n), this remaining audio Rnew is more than reference audio E feelings
Shape；And represented with the 4th row in time point t (n), this remaining audio Rnew is less than reference audio E situation.Wherein, this
The section that the left side of two row is represented with solid line represents this remaining audio Rnew during time point t (n)；And right side is with dotted line table
When the section shown then represents time point t (n), to the amount of feedback audio F deductions, i.e. the remaining audio Rold that prestores is with offseting parameter s's
Product.
It can be seen that when the reference audio E and this tertial remaining audio Rnew that compare Fig. 8 secondary series：If time point t
(n) when this remaining audio Rnew is more than reference audio E, amount (s* that the feedback audio F equivalent to time point t (n) is deducted
Rold deficiency) is still disliked.
, can be by time point t (n-1) this remaining audio in time point t (n) this remaining audio Rnew according to formula 1
Rnew and payment parameter s influence.Similarly, the class interval for offseting parameter s is adjusted in time point t (n), can also influences time point t (n+1)
This remaining audio Rnew.Therefore, the present invention can adjust payment parameter s class interval according to the 8th tertial situation of figure, make
Parameter s must be offseted and become big.
Further, when time point t (n+1) calculates time point t (n+1) this remaining audio Rnew once again, because supporting
Pin parameter s class interval was significantly adjusted in time point t (n), returning for time point t (n+1) is deducted higher ratio by audio F
After the remaining audio Rold that prestores of example, time point t (n+1) this remaining audio Rnew is just drawn.
It is event, arithmetic element is when time point t (n+1) calculates this remaining audio Rnew, because more prestore can be deducted
Remaining audio Rold reason so that time point t (n+1) this remaining audio Rnew value is greatly decreased.Accordingly, just can improve
Judge that (s*Rold) that feedback audio F is deducted still dislikes the missing of deficiency in time point t (n).
On the other hand, can be seen during this remaining audio Rnew for comparing the reference audio E and the 4th row of Fig. 8 secondary series
Go out：If this remaining audio Rnew is less than reference audio E, represents and excessive (s*Rold) is deducted in audio F is fed back.
Now, the present invention reduces the adjustment class interval to offseting parameter s using adjustment unit 275.That is, allow time point t's (n+1)
Feed back feedback audio Fs of the audio F compared with time point t (n) and deduct the less amount of remaining audio Rold that prestores.
Further, when time point t (n+1) calculates this remaining audio Rnew, because payment parameter s is in time point
The adjustment of t (n) by a small margin.
Compared with time point t (n), returning for time point t (n+1) can be because the edge that payment parameter s is adjusted by a small margin by audio F
Therefore deduct the remaining audio Rold that prestores of minor proportion.
It is event, arithmetic element feeds back the (s* that audio F is deducted when time point t (n+1) calculates this remaining audio Rnew
Rold it is smaller when) can be compared with time point t (n), equivalent to allowing this remaining audio Rnew that time point t (n+1) is calculated compared with time point t (n)
This remaining audio Rnew it is bigger, and then make time point t (n+1) this remaining audio Rnew close to reference audio E.
In summary, when feed back audio F and the remaining audio Rold that prestores correlation it is higher when, adjustment unit 275 except
Calculate outside this remaining audio Rnew, can also update payment parameter s adjustment class interval.
After adjustment class interval after adjustment unit 275 draws renewal, storage element 271 updates according to this adjustment class interval
Offset parameter (s->S'), and the payment parameter s' after renewal is stored, follow-up calculating is provided according to this and used.
Due to the present invention Acoustic processing apparatus can according to this remaining audio Rnew and reference audio E comparative result and
Dynamic adjustment payment parameter s adjustment class interval, thus the purpose of adaptive adjustment can be reached.Accordingly, can detain feedback audio F
Except Rold*s result, i.e. this remaining audio Rnew, can quickly and accurately level off to target audio.
Subsidiary one is mentioned that, Acoustic processing apparatus 27 is also alternative to be carried between storage element 271 and output unit 279
For a gain unit (not painting formula).Automatic sound wave amplification control (Auto Gain Control, abbreviation are provided by gain unit
For AGC) flow, after this remaining audio Rnew is multiplied by into enlargement ratio amp, the remaining audio Rold that prestores is updated accordingly.
The practice that the present invention uses can be directed to have carries out adaptive adjustment for environment, and such a practice need not simultaneously limit
The distance between microphone processed and loudspeaker.
No matter limit microphone and loudspeaker distance (such as：Short-range 15 centimeters, or it is distant
10 meters), the present invention dynamic finds out suitable payment parameter s adjustment class interval, and then draws more appropriate this
Remaining audio Rnew.
When therefore, using the Acoustic processing apparatus of the present invention, microphone will not be by the background audio of loudspeaker broadcast
Interference, and sound generation of howling can be avoided.Such a Acoustic processing apparatus can arrange in pairs or groups various types of microphones, such as：High sensitive wheat
Gram wind, Electret Condencer Microphone, non-capacitive microphone, directional microphone, omni-directional microphone etc..
Audio regulation method proposed by the present invention allows user to carry with microphone, it is not required that adjustment is raised one's voice
The broadcast sound volume of device, or the distance between loudspeaker and microphone, allow the convenience of microphone loudspeaking system to be substantially improved.
In summary, although the present invention is disclosed above with all embodiment, so it is not limited to the present invention.This hair
Bright those of ordinary skill in the art, without departing from the spirit and scope of the present invention, when various changes can be made
With retouching.Therefore, protection scope of the present invention is worked as and is defined depending on appended claims institute defender.
Claims (5)
- A kind of 1. audio regulation method, applied to the Acoustic processing apparatus electrically connected with a microphone, a loudspeaker, the adjustment Method comprises the steps of：A feedback audio is received from the microphone；According to the feedback audio, one prestore remaining audio with one payment parameter and computing draws this remaining audio；One correlation operation is carried out to the feedback audio and the remaining audio that prestores；Selectively modified payment parameter according to the result of the correlation operation；This remaining audio is exported to the loudspeaker；The remaining audio that prestores is updated using this remaining audio；AndStore the amended payment parameter；Comprised the steps of wherein according to the result of the correlation operation the step of the selectively modified payment parameter：When the result of the correlation operation does not meet a preparatory condition, the value of the payment parameter is maintained；AndWhen the result of the correlation operation meets a preparatory condition, joined by an adaptive adjustment flow to change the payment Number；Wherein the preparatory condition refers to that the feedback audio is default more than or equal to one related to the correlation of the remaining audio that prestores Property thresholding.
- 2. audio regulation method as claimed in claim 1, wherein the adaptive adjustment flow comprise the steps of：A reference audio is drawn after the remaining audio that prestores is multiplied by into a reference multiplying power；When this remaining audio is more than the reference audio, amplify the adjustment class interval to the payment parameter；AndWhen this remaining audio is less than the reference audio, the adjustment class interval to the payment parameter is reduced.
- 3. a kind of Acoustic processing apparatus, a microphone and a loudspeaker are electrically connected to, comprising：One input block, it receives a feedback audio from the microphone；One storage element, its store one prestore remaining audio with one payment parameter；One arithmetic element, the input block and the storage element are electrically connected to, it is according to the feedback audio, the remaining audio that prestores This remaining audio is drawn with the payment parameter and computing, and a phase is carried out to the feedback audio and the remaining audio that prestores The computing of closing property；One adjustment unit, is electrically connected to the arithmetic element, its result according to the correlation operation and the selectively modified payment Parameter；AndOne output unit, the arithmetic element is electrically connected to, it is by this remaining audio output to the loudspeaker；Wherein the storage element updates the stored remaining audio that prestores, and the storage element using this remaining audio Store the amended payment parameter；The wherein adjustment unit maintains the value of the payment parameter when result of the correlation operation does not meet a preparatory condition； And when the result of the correlation operation meets a preparatory condition, joined by an adaptive adjustment flow to change the payment Number；Wherein the preparatory condition refers to that the feedback audio is default more than or equal to one related to the correlation of the remaining audio that prestores Property thresholding.
- 4. Acoustic processing apparatus as claimed in claim 3, wherein the adjustment unit in the adaptive adjustment process CIMS this The size of secondary remaining audio and a reference audio, when this remaining audio is more than the reference audio, adjustment unit amplification Adjustment class interval to the payment parameter；And when this remaining audio is less than the reference audio, adjustment unit diminution pair The adjustment class interval of the payment parameter.
- 5. Acoustic processing apparatus as claimed in claim 4, wherein the reference audio system are by the way that the remaining audio that prestores is multiplied by Drawn after one reference multiplying power.
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