CN103188585B - Audio adjustment device and adjustment method thereof - Google Patents

Abstract

An audio adjustment device includes a memory and a processor. The memory is used to store a previously input audio sample. The processor is electrically connected to the memory to receive a current input audio sample and an ambient audio sample related to ambient sound, and obtains an audio distortion sample according to the previously input audio sample and the ambient audio sample stored in the memory, and obtains a processed audio sample according to the audio distortion sample and the currently input audio sample.

Description

Audio adjustment device and adjustment method thereof

technical field

The invention relates to an audio frequency adjustment device and an adjustment method thereof, in particular to an audio frequency adjustment device and an adjustment method thereof which can automatically and relatively reduce noise.

Background technique

At present, the audio volume output by general televisions, stereos and other devices must be adjusted by the user, and cannot be automatically adjusted to the best volume that can be clearly heard by the human ear according to the strength of the ambient background noise; in addition, these devices also lack The function of identifying specific events occurring in the surrounding environment may easily cause the user to ignore the important specific events occurring in the surrounding environment due to being too involved in listening to music or watching TV.

Contents of the invention

The purpose of the present invention is to provide an audio adjustment device that can automatically and relatively reduce noise.

The audio adjusting device of the present invention includes a memory and a processor. This memory is used to store a previous input audio sample. The processor is electrically connected to the memory, and is used to receive a current input audio sample, and receive an environmental audio sample related to environmental sound, and obtain a An audio distortion sample, and a processed audio sample is obtained according to the audio distortion sample and the current input audio sample.

The processor also judges whether a specific event needs to be recognized according to a recognition indication, and when it is determined that the recognition indication is set to recognize the specific event, recognizes whether the specific event is based on at least one audio distortion sample within a predetermined period of time occur.

The processor also sets an event continuation indication and an event occurrence indication when recognizing that the specific event occurs, and determines whether to set the warning indication as a warning according to the event continuation indication and a warning indication.

The processor also judges whether to stop the warning according to a warning off indication, and sets the warning indication as no warning when it is judged that the warning needs to be stopped.

The audio adjustment device also includes a warning device electrically connected to the processor, the warning device is used to receive the warning indication, and when the warning indication is set to be alerted, an alert is issued, and when the warning indication is set to be not required Stop alerting when alerted.

The processor also reduces the size of the adjusted current audio sample as a reference for obtaining the processed audio sample when the alert indicator is set to be alerted.

The processor adjusts the current input audio sample according to the size of the audio distorted sample to obtain the processed audio sample.

The processor subtracts the previous input audio sample stored in the memory from the ambient audio sample to obtain the audio distortion sample, and adjusts the size of the current input audio sample according to a gain and then subtracts the audio distortion sample to obtain the audio distortion sample. The processed audio sample is obtained.

Another object of the present invention is to provide an audio adjustment method that can automatically and relatively reduce noise.

The audio adjustment method of the present invention is applied to an audio adjustment system, and the audio adjustment system includes a memory, an audio extractor, a processor, an output stage and a speaker. The memory stores a previous input audio sample, the audio extractor extracts ambient sound to obtain an ambient audio sample, the output stage obtains an output audio sample according to a processed audio sample, and the speaker plays the output audio sample. The audio adjustment method is executed by the processor, and includes the following steps:

(A) receiving a current input audio sample;

(B) receiving the ambient audio sample;

(C) obtaining an audio distortion sample based on the previous input audio sample and the ambient audio sample stored in the memory; and

(D) Obtaining the processed audio sample according to the audio distortion sample and the current input audio sample.

This step (D) includes the following sub-steps:

(D1) adjusting the size of the current input audio sample according to the size of the audio distortion sample; and

(D2) Obtain the processed audio sample according to the adjusted current input audio sample.

This step (D) includes the following sub-steps:

(D1) adjusting the size of the current input audio sample according to a gain; and

(D2) Obtain the processed audio sample according to the adjusted current input audio sample and the audio distortion sample.

The audio adjustment method also includes a step (E) of setting a warning indication, and the step (E) includes the following sub-steps after the sub-step (D1):

(E1) Judging whether a specific event needs to be identified according to an identification instruction, if yes, then skip to sub-step (E2), if not, then skip to sub-step (D2);

(E2) Identify whether the specific event occurs according to at least one audio distortion sample within a preset period, if so, skip to sub-step (E3), if not, skip to sub-step (E6);

(E3) Setting an event continuation indication and an event occurrence indication, and first setting the event continuation indication to be the same as the event occurrence indication, and then setting the event occurrence indication to yes;

(E4) According to the event continuation indication and the warning indication, it is judged whether one of a first condition and a second condition is established, if so, then skip to substep (E5), if not, then skip to substep ( D2), and the first condition is that the event continuation indication is set to No, the second condition is that the event continuation indication is set to Yes and the warning indication is set to be alerted;

(E5) Set the warning indication to be alerted, and reduce the size of the adjusted current input audio sample, and obtain the processed audio sample according to the reduced current input audio sample, and skip to the sub-step (E7 );

(E6) Set the event continuation indication, the event occurrence indication, the warning indication and a warning closing indication, and set the event continuation indication, the event occurrence indication and the warning closing indication to no, and the warning Indicate that no warning is required, and skip to sub-step (D2);

This step (E) also includes the following substeps after substeps (D2) and (E5):

(E7) Judging whether to stop the warning according to the warning closing instruction, if yes, then skip to sub-step (E8), if not, then skip to step (A); and

(E8) Setting the warning indication as no warning is required.

The audio adjustment method also includes a step (E) of setting a warning indication, and the step (E) includes the following sub-steps after the sub-step (D1):

(E1) Judging whether a specific event needs to be identified according to an identification instruction, if yes, then skip to sub-step (E2), if not, then skip to sub-step (D2);

(E2) Identify whether the specific event occurs according to at least one of the audio distortion samples within the preset time period, if so, skip to sub-step (E3), if not, skip to sub-step (E6);

(E3) Setting an event continuation indication and an event occurrence indication, and first setting the event continuation indication to be the same as the event occurrence indication, and then setting the event occurrence indication to yes;

(E4) According to the event continuation indication and the warning indication, it is judged whether one of a first condition and a second condition is established, if so, then skip to substep (E5), if not, then skip to substep ( D2), and the first condition is that the event continuation indication is set to No, the second condition is that the event continuation indication is set to Yes, and the warning indication is set to be alerted;

(E5) Setting the warning indication as requiring a warning;

(E6) Set the event continuation indication, the event occurrence indication, the warning indication and a warning closing indication, and set the event continuation indication, the event occurrence indication and the warning closing indication to no, and the warning Indicate that no warning is required, and skip to sub-step (D2);

This step (E) also includes the following substeps after the substep (D2):

(E7) Judging whether to stop the warning according to the warning closing instruction, if yes, then skip to sub-step (E8), if not, then skip to step (A); and

(E8) Setting the warning indication as no warning is required.

The beneficial effect of the present invention is that by obtaining the audio distortion samples related to the ambient sound and processing according to the audio distortion samples, the noise can be relatively automatically reduced.

Description of drawings

FIG. 1 is a block diagram illustrating first to third preferred embodiments of the audio adjusting device of the present invention;

Fig. 2 is a flowchart illustrating the audio adjustment method performed by the first preferred embodiment;

Fig. 3 is a flowchart illustrating the audio adjustment method performed by the second preferred embodiment;

Fig. 4 is a flowchart illustrating the audio adjustment method performed by the third preferred embodiment;

FIG. 5 is a block diagram illustrating fourth and fifth preferred embodiments of the audio adjusting device of the present invention;

Fig. 6 is a flowchart illustrating the audio adjustment method performed by the fourth preferred embodiment; and

FIG. 7 is a flowchart illustrating the audio adjustment method performed by the fifth preferred embodiment.

detailed description

The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

Referring to FIG. 1 , the first preferred embodiment of the audio adjusting device 1 of the present invention is suitable for being electrically connected to an audio extractor 2 and a speaker 3 to form an audio adjusting system. The audio adjustment device 1 includes a memory 11 , a processor 12 electrically connected to the memory 11 and the audio extractor 2 , and an output stage 13 electrically connected to the processor 12 and the speaker 3 . The audio extractor 2 (such as a microphone) is used to capture ambient sound to obtain an ambient audio sample. The memory 11 has a first storage space 111 and a second storage space 112 without intersection, the first storage space 111 is used to store at least one input audio sample, and the second storage space 112 is used to store at least one audio distortion sample . The output stage 13 is used to receive a digital processed audio sample and perform digital-to-analog conversion on the processed audio sample to obtain an analog output audio sample. The speaker 3 is used to play the output audio sample.

Referring to FIG. 1 and FIG. 2 , the processor 12 is used to execute an audio adjustment method. The audio adjustment method includes the following steps 21-24.

Step 21: The processor 12 receives a current input audio sample A(t), and stores the current input audio sample A(t) in the first storage space 111 of the memory 11 . It is worth noting that before step 21, the first storage space 111 of the memory 11 has already stored the previous input audio sample A(t-Δt) of the current input audio sample A(t), hereinafter referred to as the previous input Audio sample A(t-Δt).

Step 22: The processor 12 receives the ambient audio sample B(t−Δt) from the audio extractor 2 .

Step 23: The processor 12 obtains an audio distortion sample f( t−Δt), and store the audio distortion sample f(t−Δt) in the second storage space 112 of the memory 11 .

In this embodiment, the processor 12 subtracts the previous input audio sample A(t-Δt) stored in the memory 11 from the ambient audio sample B(t-Δt) to obtain the audio distortion sample f( t-Δt), that is to say f(t-Δt)=B(t-Δt)-A(t-Δt).

Step 24: The processor 12 adjusts and updates the size of the current input audio sample A(t) stored in the memory 11 according to the size of the audio distortion sample f(t-Δt) stored in the memory 11, and according to the The adjusted current input audio sample A(t) stored in the memory 11 obtains the processed audio sample A'(t). Then skip to step 21.

In this embodiment, the processor 12 regards the adjusted current input audio sample A(t) stored in the memory 11 as the processed audio sample A'(t), that is to say, A'(t )=A(t). In addition, the processor 12 increases the size of the current input audio sample A(t) stored in the memory 11 when the size of the audio distortion sample f(t-Δt) is too large. If the size of the sample f(t-Δt) is too small, the size of the current input audio sample A(t) stored in the memory 11 is reduced to maintain a fixed signal-to-noise ratio (Signal to Noise Ratio, SNR). Therefore, in When the environment is noisier and the size of the audio distortion sample f(t-Δt) is larger, the volume played by the speaker 3 is also increased, and the quieter the environment makes the audio distortion sample f(t-Δt) The smaller the size, the lower the volume played by the speaker 3 , so that the user can avoid the trouble of adjusting the volume by himself. Furthermore, the processor 12 can limit the size of the adjusted current input audio sample A(t) stored in the memory 11 to not exceed a preset upper limit, for example, 85dB, thus limiting the loudspeaker 3 to play The volume of the device will not exceed 85dB to avoid damage to the user's hearing or the audio adjustment device due to excessive output power.

1 and 3, the second preferred embodiment of the audio adjustment device 1 of the present invention is similar to the first preferred embodiment, the difference is that the audio adjustment method executed by the processor 12 includes the following steps 31- 43.

Step 31: The processor 12 receives the current input audio sample A(t), and stores the current input audio sample A(t) in the first storage space 111 of the memory 11 . It should be noted that, before step 31, the first storage space 111 of the memory 11 has stored the previous input audio sample A(t-Δt) of the current input audio sample A(t), hereinafter referred to as the previous input Audio sample A(t-Δt).

Step 32: The processor 12 receives the ambient audio sample B(t−Δt) from the audio extractor 2 .

Step 33: The processor 12 obtains the audio distortion sample f( t-Δt), such as f(t-Δt)=B(t-Δt)-A(t-Δt), and store the audio distortion sample f(t-Δt) in the second storage space of the memory 11 112 in.

Step 34: The processor 12 adjusts and updates the size of the current input audio sample A(t) stored in the memory 11 according to the size of the audio distortion sample f(t-Δt) stored in the memory 11, for example, in the When the size of the audio distortion sample f(t-Δt) is too large, the size of the current input audio sample A(t) stored in the memory 11 is increased, and the size of the audio distortion sample f(t-Δt) When it is smaller, the size of the current input audio sample A(t) stored in the memory 11 is reduced to maintain a fixed signal-to-noise ratio, and the adjusted current input audio sample A(t) stored in the memory 11 is limited. t) does not exceed a preset upper limit.

Step 35: The processor 12 judges whether a specific event needs to be recognized (such as a baby crying, a patient groaning for help, a phone ringing or a doorbell ringing, etc.) according to a recognition instruction, and if so, jump to step 36; if not, then Skip to step 41. The identification indication is set by the user.

Step 36: The processor 12 identifies the specific audio distortion sample f(t-n×Δt) according to at least one audio distortion sample f(t-n×Δt) within a preset period stored in the memory 11, n=1,,...,N, N≥1 Whether the event occurs, if so, then jump to step 37, if not, then jump to step 40. It is worth noting that if the number of audio distortion samples is large enough, the accuracy of specific event judgment is relatively high.

Step 37: The processor 12 sets an event continuation indicator and an event occurrence indicator. The event continuation indication can be set to "yes" (indicating that the specific event continues to occur) or "no" (indicating that the specific event does not continue to occur), and its initial value is "no". The event occurrence indication can be set as "yes" (indicating that the specific event occurred) or "no" (indicating that the specific event did not occur), and its initial value is "no". In step 37, the processor 12 first sets the event continuation indication to be the same as the event occurrence indication, and then sets the event occurrence indication to "Yes".

Step 38: The processor 12 judges whether one of a first condition and a second condition is established according to the event continuation indication and a warning indication, if yes, then jump to step 39, if not, then jump to step 41 . The warning indication can be set as needing warning or not needing warning, and its initial value is not needing warning. The first condition is that the event continuation indication is set to "No". The second condition is that the event continuation indication is set to "Yes" and the warning indication is set to be alerted.

Step 39: The processor 12 sets the warning indication to be a warning, and reduces and updates the size of the adjusted current input audio sample A(t) stored in the memory 11, and according to the size of the current input audio sample A(t) stored in the memory 11, The reduced current input audio sample A(t) obtains the processed audio sample A'(t), such as A'(t)=A(t), to reduce the volume played by the speaker 3, or even mute, Therefore, the user can easily perceive the occurrence of the specific event. Then skip to step 42.

Step 40: The processor 12 sets the event continuation indicator, the event occurrence indicator, the alert indicator and an alert off indicator. The warning off indication can be set to "Yes" by the user (indicating that the warning needs to be stopped) or set to "No" (indicating that the warning does not need to be stopped) by the processor 12, and its initial value is "No". In step 40, the processor 12 sets the event continuation indication, the event occurrence indication and the warning off indication to "No", and sets the warning indication to no warning.

Step 41: The processor 12 obtains the processed audio sample A'(t) according to the adjusted current input audio sample A(t) stored in the memory 11, for example, A'(t)=A(t), The volume played by the speaker 3 is not affected by whether a specific event occurs.

Step 42: The processor 12 judges whether to stop the warning according to the warning off instruction, if yes, go to step 43, if not, go to step 31.

Step 43: The processor 12 sets the warning indication as no warning. Then skip to step 31.

In this embodiment, by means of step 38 , when the specific event continues to occur and the user chooses to stop the warning, steps 41 - 43 are executed, so that the warning will not be issued again.

Referring to Fig. 1 and Fig. 4, the third preferred embodiment of the audio adjustment device 1 of the present invention is similar to the second preferred embodiment, the difference lies in the step 34' and the step 34' of the audio adjustment method performed by the processor 12 Step 41'.

Step 34': The processor 12 adjusts and updates the size of the current input audio sample A(t) stored in the memory 11 according to a gain, wherein the gain can be a setting value set by the user, or is a default value set in the audio adjustment device 1 .

Step 41': The processor 12 obtains the processed audio sample A'(t) according to the adjusted current input audio sample A(t) and the audio distortion sample f(t-Δt) stored in the memory 11.

In this embodiment, the audio distortion sample f(t-Δt) is subtracted from the adjusted current input audio sample A(t) stored in the memory 11 to obtain the processed audio sample A'(t ), that is to say A'(t)=A(t)-f(t-Δt).

It should be noted that, in the first and second preferred embodiments, when the environment is noisy and the size of the audio distortion sample f(t-Δt) is too large, the processor 12 will store the At present, the input audio sample A (t) is increased to obtain the processed audio sample A' (t), so that the volume played by the speaker 3 is also increased, so the noise is relatively reduced, and in the third preferred implementation In an example, the processor 12 subtracts the audio distortion sample f(t-Δt) from the adjusted current input audio sample A(t) stored in the memory 11 to obtain the processed audio sample A'(t) , so that the sound played by the loudspeaker 3 can offset the noise, so the noise is relatively reduced.

Referring to Fig. 5 and Fig. 6, the fourth preferred embodiment of the audio adjusting device 1' of the present invention is similar to the first preferred embodiment, except that: (1) the audio adjusting device 1' also includes an electrical connection In the warning device 14 of the processor 12, the warning device 14 (such as a screen, a lamp or a vibrator, etc.) is used to receive a warning indication, and to send a warning when the warning indication is set to require a warning (such as a screen display message , light flashing or vibrator vibration, etc.), and when the warning indication is set to no warning, the warning is stopped, and the initial value of the warning indication is no warning; (2) the audio frequency executed by the processor 12 The adjustment method includes the following steps 61-73.

Step 61 : The processor 12 receives the current input audio sample A(t), and stores the current input audio sample A(t) in the first storage space 111 of the memory 11 . It is worth noting that before step 61, the first storage space 111 of the memory 11 has already stored the previous input audio sample A(t-Δt) of the current input audio sample A(t), hereinafter referred to as the previous input Audio sample A(t-Δt).

Step 62: The processor 12 receives the ambient audio sample B(t−Δt) from the audio extractor 2 .

Step 63: The processor 12 obtains the audio distortion sample f( t-Δt), such as f(t-Δt)=B(t-Δt)-A(t-Δt), and store the audio distortion sample f(t-Δt) in the second storage space of the memory 11 112 in.

Step 64: The processor 12 adjusts and updates the size of the current input audio sample A(t) stored in the memory 11 according to the size of the audio distortion sample f(t-Δt) stored in the memory 11, for example, in the When the size of the audio distortion sample f(t-Δt) is too large, the size of the current input audio sample A(t) stored in the memory 11 is increased, and the size of the audio distortion sample f(t-Δt) If it is too small, the size of the current input audio sample A(t) stored in the memory 11 is reduced to maintain the fixed signal-to-noise ratio, and limit the adjusted current input audio sample A stored in the memory 11 The size of (t) does not exceed the preset upper limit.

Step 65: The processor 12 judges whether a specific event needs to be recognized according to a recognition instruction (such as a baby crying, a patient moaning for help, a telephone ringing or a doorbell ringing, etc.), if so, jump to step 66, if not, then Skip to step 71. The identification indication is set by the user.

Step 66: The processor 12 identifies the specific audio distortion sample f(t-n×Δt) within a preset period of time stored in the memory 11, n=1, . . . , N, N≥1 Whether the event occurs, if so, then jump to step 67, if not, then jump to step 70. It is worth noting that if the number of audio distortion samples is large enough, the accuracy of specific event judgment is relatively high.

Step 67: The processor 12 sets an event continuation indicator and an event occurrence indicator. The event continuation indication can be set to "yes" (indicating that the specific event continues to occur) or "no" (indicating that the specific event does not continue to occur), and its initial value is "no". The event occurrence indication can be set as "yes" (indicating that the specific event occurred) or "no" (indicating that the specific event did not occur), and its initial value is "no". In step 67, the processor 12 first sets the event continuation indication to be the same as the event occurrence indication, and then sets the event occurrence indication to "Yes".

Step 68: The processor 12 judges whether one of a first condition and a second condition is established according to the event continuation indication and the warning indication, if yes, then go to step 69, if not, then go to step 71 . The first condition is that the event continuation indication is set to "No". The second condition is that the event continuation indication is set to "Yes" and the warning indication is set to be alerted.

Step 69: The processor 12 sets the warning indication as warning, so that the warning device 14 sends out a warning to inform the user of the occurrence of the specific event. Then skip to step 71.

Step 70: The processor 12 sets the event continuation indicator, the event occurrence indicator, the alert indicator and an alert off indicator. The warning off indication can be set to "Yes" by the user (indicating that the warning needs to be stopped) or set to "No" (indicating that the warning does not need to be stopped) by the processor 12, and its initial value is "No". In step 70, the processor 12 sets the event continuation indication, the event occurrence indication and the warning off indication to "No", and sets the warning indication to no warning.

Step 71: The processor 12 obtains the processed audio sample A'(t) according to the adjusted current input audio sample A(t) stored in the memory 11, for example, A'(t)=A(t) .

Step 72: The processor 12 judges whether to stop the warning according to the warning closing instruction, if yes, go to step 73, if not, go to step 61.

Step 73: The processor 12 sets the warning indication as no warning, so that the warning device 14 stops giving warning. Then skip to step 61.

Referring to Fig. 5 and Fig. 7, the fifth preferred embodiment of the audio adjustment device 1' of the present invention is similar to the fourth preferred embodiment, the difference lies in the step 64' of the audio adjustment method executed by the processor 12 and step 71'.

Step 64': the processor 12 adjusts and updates the size of the current input audio sample A(t) stored in the memory 11 according to a gain, wherein the gain can be a set value set by the user, or is a default value set in the audio adjustment device 1 .

Step 71': the processor 12 obtains the processed audio sample A'(t) according to the adjusted current input audio sample A(t) and the audio distortion sample f(t-Δt) stored in the memory 11, For example, A'(t)=A(t)-f(t-Δt).

To sum up the above, in the first, second and fourth preferred embodiments, the processor 12 stores the audio distortion sample f(t-Δt) in the memory 11 when the environment is noisy and the size of the audio distortion sample f(t-Δt) is too large The current input audio sample A(t) is increased to obtain the processed audio sample A'(t), so that the volume played by the speaker 3 is also increased, so the noise is relatively reduced. In five preferred embodiments, the processor 12 subtracts the audio distortion sample f(t-Δt) from the adjusted current input audio sample A(t) stored in the memory 11 to obtain the processed audio sample A '(t), so that the sound played by the speaker 3 can offset the noise, so the noise is relatively reduced.

In addition, in the second to fifth preferred embodiments, the audio adjustment device 1, 1' also has the function of identifying a specific event, and in the second and third preferred embodiments, the audio adjustment device 1, 1' also has the function of reducing the volume. It is easier for the user to notice the occurrence of the specific event, and in the fourth and fifth preferred embodiments, the user is notified of the occurrence of the specific event in the form of a reminder.

It should be noted that, in the first to fifth preferred embodiments, the audio extractor 2 is externally connected to the audio adjustment device 1, 1', and communicates with the processor 12 in a wired manner, but in In another embodiment, the audio extractor 2 can communicate with the processor 12 in a wireless manner, and in yet another embodiment, the audio extractor 2 can be built in the audio adjustment device 1, 1'. In addition, in the first to fifth preferred embodiments, the audio adjustment device 1, 1' is applied to a monophonic audio adjustment system, that is, there is only one loudspeaker. It can be deduced how to modify the audio adjustment device 1, 1' when it is applied to a multi-channel audio adjustment system, so no further description will be given.

Claims (13)

1. an audio frequency adjusting device, comprises a memory and a processor, it is characterized in that:

This memory previously inputted audio sample for storing one;

This processor is electrically connected on this memory, audio sample is inputted at present for receiving one, and the environment audio sample that reception one is relevant to ambient sound, and this stored by this memory previously inputted audio sample and this environment audio sample, obtain an audio distortion sample, and input audio sample at present according to this audio distortion sample and this, obtain a processed audio sample.

2. audio frequency adjusting device according to claim 1, it is characterized in that: this processor also judges whether to need identification particular event according to an identification instruction, and when judging that this identification instruction is set as needing this particular event of identification, whether occur according at least one this particular event of audio distortion sample identification in a preset period of time.

3. audio frequency adjusting device according to claim 2, it is characterized in that: this processor is also when picking out this particular event and occurring, set an event lasting indication and an event occurring indication, and determine whether this warning indication be set as needing warning according to this event lasting indication and a warning indication.

4. audio frequency adjusting device according to claim 3, is characterized in that: this processor also cuts out instruction according to a warning and judges whether to stop warning, and when judging to stop warning, this warning indication is set as not needing warning.

5. audio frequency adjusting device according to claim 4, it is characterized in that: this audio frequency adjusting device, also comprise the attention device that is electrically connected on this processor, this attention device is for receiving this warning indication, and be set as sending warning when need warn in this warning indication, and stop sending warning when this warning indication is set as not needing warning.

6. audio frequency adjusting device according to claim 4, it is characterized in that: this processor adjusts this size of input audio sample or size according to this current input audio sample of a Gain tuning at present according to this audio distortion size, this processor is also when being set as warning by this warning indication, reduce the size of adjusted current input audio sample, using as the reference obtaining this processed audio sample.

7. audio frequency adjusting device according to claim 1, is characterized in that: this processor adjusts this according to this audio distortion size to input audio sample at present, to obtain this processed audio sample.

8. audio frequency adjusting device according to claim 1, it is characterized in that: this processor be this environment audio sample is deducted stored by this memory this previously inputted audio sample, to obtain this audio distortion sample, and deduct this audio distortion sample again, to obtain this processed audio sample according to this size inputting audio sample at present of a Gain tuning.

9. an audio regulation method, apply to a kind of audio-frequency adjusting system, this audio-frequency adjusting system comprises a memory, an audio frequency acquisition device, a processor, an output stage and a loud speaker, this memory storage one previously inputted audio sample, this audio frequency acquisition device acquisition ambient sound, to obtain an environment audio sample, this output stage is according to a processed audio sample, obtain an output audio sample, this output audio sample play by this loud speaker, it is characterized in that: this audio regulation method is performed by this processor, and comprise following steps:

(A) receive one and input audio sample at present;

(B) this environment audio sample is received;

(C) this stored by this memory previously inputted audio sample and this environment audio sample, obtained an audio distortion sample; And

(D) input audio sample at present according to this audio distortion sample and this, obtain this processed audio sample.

10. audio regulation method according to claim 9, is characterized in that: this step (D) comprises following sub-step:

(D1) adjust according to this audio distortion size the size that this inputs audio sample at present; And

(D2) according to adjusted current input audio sample, this processed audio sample is obtained.

11. audio regulation methods according to claim 9, is characterized in that: this step (D) comprises following sub-step:

(D1) according to a Gain tuning, this inputs the size of audio sample at present; And

(D2) according to adjusted current input audio sample and this audio distortion sample, this processed audio sample is obtained.

12. audio regulation methods according to claim 10 or 11, it is characterized in that: this audio regulation method also comprises a step (E) of a setting warning indication, and this step (E) is included in the following sub-step after sub-step (D1):

(E1) judge whether to need identification particular event according to an identification instruction, if so, then jump to sub-step (E2), if not, then jump to sub-step (D2);

(E2) whether occur according at least one this particular event of audio distortion sample identification in a preset period of time, if so, then jump to sub-step (E3), if not, then jump to sub-step (E6);

(E3) set an event lasting indication and an event occurring indication, and be first this event lasting indication is set as being same as this event occurring indication, then this event occurring indication is set as yes;

(E4) according to this event lasting indication and this warning indication, judge whether the one in a first condition and a second condition is set up, if, then jump to sub-step (E5), if not, then jump to sub-step (D2), and this first condition is set to for this event lasting indication no, this second condition for this event lasting indication be set to be and this warning indication is set to need warning;

(E5) this warning indication is set as need warning, and reduces the size of this adjusted current input audio sample, and obtain this processed audio sample according to the current input audio sample that this has reduced, and jump to sub-step (E7);

(E6) set this event lasting indication, this event occurring indication, this warning indication and a warning and close instruction, and this event lasting indication, this event occurring indication and this warning closedown instruction are all set as no, and this warning indication be set as not needing warning, and jump to sub-step (D2);

This step (E) is also included in the following sub-step after sub-step (D2) and (E5):

(E7) close instruction according to this warning to judge whether to stop warning, if so, then jump to sub-step (E8), if not, then jump to step (A); And

(E8) this warning indication is set as do not need warning.

13. audio regulation methods according to claim 10 or 11, it is characterized in that: this audio regulation method also comprises a step (E) of a setting warning indication, and this step (E) is included in the following sub-step after sub-step (D1):

(E1) judge whether to need identification particular event according to an identification instruction, if so, then jump to sub-step (E2), if not, then jump to sub-step (D2);

(E2) whether occur according to this this particular event of audio distortion sample identification of at least one in this preset period of time, if so, then jump to sub-step (E3), if not, then jump to sub-step (E6);

(E3) set an event lasting indication and an event occurring indication, and first this event lasting indication is set as being same as this event occurring indication, then this event occurring indication is set as yes;

(E4) according to this event lasting indication and this warning indication, judge whether the one in a first condition and a second condition is set up, if, then jump to sub-step (E5), if not, then jump to sub-step (D2), and this first condition is set to for this event lasting indication no, this second condition is set to be that and this warning indication is set to need warning for this event lasting indication;

(E5) this warning indication is set as need warning;

(E6) set this event lasting indication, this event occurring indication, this warning indication and a warning and close instruction, and this event lasting indication, this event occurring indication and this warning closedown instruction are all set as no, and this warning indication be set as not needing warning, and jump to sub-step (D2);

This step (E) is also included in the following sub-step after sub-step (D2):

(E7) close instruction according to this warning to judge whether to stop warning, if so, then jump to sub-step (E8), if not, then jump to step (A); And

(E8) this warning indication is set as do not need warning.