CN112887856A - Sound processing method and system for reducing noise - Google Patents
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
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- G—PHYSICS
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- G10L21/00—Speech or voice signal processing techniques to produce another audible or non-audible signal, e.g. visual or tactile, in order to modify its quality or its intelligibility
- G10L21/02—Speech enhancement, e.g. noise reduction or echo cancellation
- G10L21/0208—Noise filtering
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
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- G10L21/00—Speech or voice signal processing techniques to produce another audible or non-audible signal, e.g. visual or tactile, in order to modify its quality or its intelligibility
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Abstract
The invention discloses a sound processing method and a sound processing system for reducing noise, wherein the sound processing method for reducing noise is suitable for the sound processing system for reducing noise; the sound processing system for reducing noise comprises a radio module, a main control module and a playing module which are in signal connection in sequence; the sound processing method for reducing the noise comprises the steps of receiving sound wave signals collected by a radio module through a main control module, comparing the maximum amplitude value of each frame of sound wave signals with the maximum threshold value of the amplitude value, and calculating an adjusting coefficient according to the proportion that the maximum amplitude value of each frame of sound wave signals exceeds the maximum threshold value; and adjusting the amplitude of the sound wave signal in the corresponding frame through the main control module according to the adjusting coefficient, and sending the adjusted sound wave signal to the playing module.
Description
Technical Field
The present invention relates to the field of sound pickup detection technologies, and in particular, to a sound processing method and system for reducing noise.
Background
The sound pick-up is a device for collecting the sound of the field environment and transmitting the sound to the back-end equipment, and comprises a sound receiving device (such as a microphone) and an audio amplifying circuit. The adapter is widely used in the detection field, and people can judge whether the abnormality occurs by analyzing the sound collected by the adapter.
A sound pickup is a sound amplification apparatus, and in the field of detection, the sound pickup is generally used to amplify a fine sound to a sound intensity that can be easily recognized by human ears for analysis. In the detection process, in order to acquire audio signals at different positions, the sound receiving device needs to be placed at different positions and possibly moved in the sound receiving process. When the sound receiving device is set or moved, the sound receiving device may collide with an external member and make a sound, the output volume generated after the collision sound is amplified may far exceed the receiving range of human ears, and if the output volume is transmitted to human ears without being processed at this time, the hearing of the detecting person may be damaged. In real use, besides the above situations, there are various situations in which noise that may affect hearing may be received, and the existing sound pickup does not take protective measures for this, so that the probe person risks hearing damage.
Disclosure of Invention
The invention mainly aims to provide a sound processing method and a sound processing system for reducing noise, and aims to solve the problem that the conventional sound pickup cannot reduce high-decibel noise.
In order to achieve the above object, the present invention provides a sound processing method for reducing noise, which is suitable for a sound processing system for reducing noise; the sound processing system for reducing noise comprises a radio module, a main control module and a playing module which are in signal connection in sequence;
the sound processing method for reducing noise includes the steps of:
receiving the sound wave signals collected by the sound receiving module through the main control module, comparing the maximum amplitude value of each frame of sound wave signals with the maximum threshold value of the amplitude value, and calculating an adjusting coefficient according to the proportion that the maximum amplitude value of each frame of sound wave signals exceeds the maximum threshold value;
and adjusting the amplitude of the sound wave signal in the corresponding frame according to the adjusting coefficient through the main control module, and sending the adjusted sound wave signal to the playing module.
Preferably, before the step of receiving, by the main control module, the sound wave signal collected by the sound receiving module, comparing the maximum amplitude value of each frame of the sound wave signal with the maximum threshold of the amplitude value, and calculating the adjustment coefficient according to the ratio that the maximum amplitude value of each frame of the sound wave signal exceeds the maximum threshold, the method further includes:
picking up the sound wave signals through the radio module according to a preset frequency instruction, and sending the picked sound wave signals to the main control module;
and dividing the sound wave signal into a plurality of frames by the main control module according to the sound wave sequence number.
Preferably, the sound processing system for reducing noise further comprises a display screen and an input terminal, wherein the display screen and the input terminal are in signal connection with the main control module;
before the step of picking up the sound wave signal according to a preset frequency instruction through the radio module, the method further comprises the following steps:
displaying sampling frequency options through the display screen, and selecting corresponding sampling frequency options through the input terminal;
and sending the preset frequency instruction to the radio module through the main control module according to the selected corresponding sampling frequency option.
Preferably, the sound processing system for reducing noise further comprises an identification module; the identification module is respectively in signal connection with the radio receiving module and the main control module;
the method comprises the following steps of receiving sound wave signals collected by the sound receiving module through the main control module, comparing the maximum amplitude value of each frame of sound wave signals with the maximum threshold value of the amplitude value, and calculating an adjusting coefficient according to the proportion that the maximum amplitude value of each frame of sound wave signals exceeds the maximum threshold value, and further comprising the following steps of:
and judging and respectively extracting a human sound wave signal and an environment sound wave signal in the sound wave signals through the identification module, and sending the corresponding human sound wave signal or/and the environment sound wave signal to the main control module according to a sound channel selection instruction.
Preferably, the identification module comprises a sound channel control unit, and the sound channel control unit is used for controlling the type of the sound wave signal sent to the main control module;
the step of sending the corresponding human sound wave signal or/and the environment sound wave signal to the main control module according to the sound channel selection instruction comprises the following steps:
displaying the sound channel options through the display screen, and selecting the corresponding sound channel options through the input terminal;
sending the sound channel control instruction to the sound channel control unit through the main control module according to the selected sound channel option;
and acquiring the corresponding type of sound wave signals from the identification module according to the sound channel control instruction through the sound channel control unit, and sending the corresponding type of sound wave signals to the main control module.
Preferably, the sound wave signal comprises a human sound wave signal, an environment sound wave signal and a comprehensive sound wave signal;
the sound channel options comprise a human sound channel, an environment sound channel and a comprehensive sound channel; the human voice sound channel corresponds to the human voice sound wave signal, the environment sound channel corresponds to the environment sound wave signal, and the comprehensive sound channel corresponds to the comprehensive sound wave signal; the comprehensive sound wave signal is a mixed sound wave signal containing the human sound wave signal and the environment sound wave signal.
Preferably, the calculation formula of the adjustment coefficient is as follows:
wherein q is the adjustment coefficient; a is the maximum amplitude value of the sound wave signal in each frame; b is the maximum threshold; and when a-b is less than or equal to 0, q is 1.
Preferably, the sampling frequency option includes at least one of 8kHz, 11.025kHz, 22.05kHz, 16kHz, 37.8kHz, 44.1kH, or 48 kHz.
Preferably, the sound processing system for reducing noise further comprises a storage module; the storage module is in signal connection with the radio module;
after the step of picking up the sound wave signal according to a preset frequency instruction through the radio module, the method further comprises the following steps:
and sending the picked sound wave signal to the storage module through the sound receiving module.
In addition, in order to achieve the above object, the present invention also provides a sound processing system for reducing noise, which applies the steps in any one of the above methods;
the sound processing system for reducing noise comprises a main control module and a playing module, wherein the main control module is in signal connection with the playing module.
In the technical solution of the present invention, the sound wave signal is divided into a plurality of segments by frames, the main control module obtains the maximum amplitude value of each frame of the sound wave signal, compares the maximum amplitude value with the maximum threshold, and when the maximum amplitude value exceeds the maximum threshold, it indicates that the volume of the sound wave signal has exceeded an acceptable range, which may damage the hearing of the testing personnel. Therefore, amplitude reduction processing is carried out on the sound wave signals in the corresponding frames according to the adjusting coefficients through the main control module, the sound wave signals are integrally compressed by the same coefficients, so that the maximum amplitude value after amplitude reduction processing does not exceed the maximum threshold value, the sound volume of the sound wave signals after processing is ensured to be within a preset range, and hearing of detection personnel is not damaged. The sound wave signals adjusted by the main control module are sent to the playing module to be played, and the detection personnel receive the sound meeting the hearing requirement. There is also a known sound processing method that performs mute processing when the volume value exceeds a threshold value, and although this processing method can effectively protect the hearing of the testing staff, valid sound data is lost in the mute period, so that the sound received by the testing staff on site is incomplete, and the testing result may be affected. In contrast, the technical scheme of the invention can process the high decibel noise into sound in a volume range meeting the hearing requirement without completely losing sound data, and can effectively keep the integrity of the data so as to improve the accuracy of detection. In addition, the technical scheme of the invention is that the adjusting coefficient is obtained by calculating the original volume value, and the sound wave signals in each frame are uniformly adjusted according to the adjusting coefficient, so that the trueness of the sound heard by the detection personnel can be effectively guaranteed.
Drawings
FIG. 1 is a flow chart of a sound processing method for reducing noise according to the present invention.
The objects, features and advantages of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1, a first embodiment of a sound processing method for reducing noise according to the present invention is applied to a sound processing system for reducing noise; the sound processing system for reducing noise comprises a radio module, a main control module and a playing module which are in signal connection in sequence;
the sound processing method for reducing noise includes the steps of:
step S10, the sound wave signals collected by the sound receiving module are received by the main control module, the maximum amplitude value of each frame of sound wave signals is compared with the maximum threshold value of the amplitude value, and the adjusting coefficient is calculated according to the proportion that the maximum amplitude value of each frame of sound wave signals exceeds the maximum threshold value;
and step S20, adjusting the amplitude of the sound wave signal in the corresponding frame through the main control module according to the adjusting coefficient, and sending the adjusted sound wave signal to the playing module.
In the technical solution of the present invention, the sound wave signal is divided into a plurality of segments by frames, the main control module obtains the maximum amplitude value of each frame of the sound wave signal, compares the maximum amplitude value with the maximum threshold, and when the maximum amplitude value exceeds the maximum threshold, it indicates that the volume of the sound wave signal has exceeded an acceptable range, which may damage the hearing of the testing personnel. Therefore, amplitude reduction processing is carried out on the sound wave signals in the corresponding frames according to the adjusting coefficients through the main control module, the sound wave signals are integrally compressed by the same coefficients, so that the maximum amplitude value after amplitude reduction processing does not exceed the maximum threshold value, the sound volume of the sound wave signals after processing is ensured to be within a preset range, and hearing of detection personnel is not damaged. The sound wave signals adjusted by the main control module are sent to the playing module to be played, and the detection personnel receive the sound meeting the hearing requirement. There is also a known sound processing method that performs mute processing when the volume value exceeds a threshold value, and although this processing method can effectively protect the hearing of the testing staff, valid sound data is lost in the mute period, so that the sound received by the testing staff on site is incomplete, and the testing result may be affected. In contrast, the technical scheme of the invention can process the high decibel noise into sound in a volume range meeting the hearing requirement without completely losing sound data, and can effectively keep the integrity of the data so as to improve the accuracy of detection. In addition, the technical scheme of the invention is that the adjusting coefficient is obtained by calculating the original volume value, and the sound wave signals in each frame are uniformly adjusted according to the adjusting coefficient, so that the trueness of the sound heard by the detection personnel can be effectively guaranteed.
Preferably, the adjusting, by the main control module, the amplitude of the sound wave signal in the corresponding frame according to the adjustment coefficient in step S20 includes:
and step S21, uniformly multiplying the amplitude of the sound wave signal by the adjusting coefficient in the corresponding frame to obtain a new sound wave signal.
Based on the first embodiment of the sound processing method for reducing noise according to the present invention, in the second embodiment of the sound processing method for reducing noise according to the present invention, before the step S10, the method further includes:
step S30, picking up the sound wave signal through the radio module according to a preset frequency instruction, and sending the picked sound wave signal to the main control module;
and step S40, dividing the sound wave signal into a plurality of frames by the main control module according to the sound wave sequence number.
Further, the sending the picked-up sound wave signal to the main control module in the step S30 includes:
step S31, marking the sound wave serial number for each sound wave point through the sound receiving module, and sending the sound wave points marked with the sound wave serial numbers to the main control module;
wherein the sound receiving module marks the sound wave points circularly from 1 to 1024 according to the time sequence of picking up the sound wave signals.
Further, the step S40 includes:
step S41, receiving the sound wave points through the main control module, and dividing the sound wave points marked with the sound wave sequence numbers of 1 to 1024 in succession into one frame.
Based on the second embodiment of the sound processing method for reducing noise of the present invention, in a third embodiment of the sound processing method for reducing noise of the present invention, the sound processing system for reducing noise further includes a display screen and an input terminal, both of which are in signal connection with the main control module;
before the step S30 of picking up the sound wave signal by the sound reception module according to a preset frequency instruction, the method further includes:
step S50, displaying sampling frequency options through the display screen, and selecting corresponding sampling frequency options through the input terminal;
and step S60, sending the preset frequency instruction to the radio module through the main control module according to the selected corresponding sampling frequency option.
The sampling frequency reflects the frequency of the sound wave points acquired by the sound receiving module in unit time, and the higher the sampling frequency is, the closer the sound heard by the detection personnel is to the real sound, but the higher the sampling power consumption is. The required sampling frequency can be selected by the detection personnel through the input terminal according to actual needs so as to adapt to different environmental requirements.
Based on the third embodiment of the sound processing method for reducing noise of the present invention, in the fourth embodiment of the sound processing method for reducing noise of the present invention, the sound processing system for reducing noise further includes an identification module; the identification module is respectively in signal connection with the radio receiving module and the main control module;
before the step S10, the method further includes:
and step S70, judging and respectively extracting a human sound wave signal and an environment sound wave signal in the sound wave signals through the identification module, and sending the corresponding human sound wave signal or/and the environment sound wave signal to the main control module according to a sound channel selection instruction.
Preferably, the determining and respectively extracting, by the identification module, the human sound wave signal and the environmental sound wave signal in the sound wave signal in step S70 includes:
step S71, obtaining a pre-stored voice sound wave sample, comparing the sound wave signal collected by the sound receiving module with the voice sound wave sample through the identification module, separating the sound wave signal according with the sample characteristic from the sound wave signal collected by the sound receiving module, and marking the sound wave signal as the voice sound wave signal;
and step S72, marking the separated sound wave signal collected by the sound receiving module as the environment sound wave signal through the identification module.
Based on the fourth embodiment of the sound processing method for reducing noise of the present invention, in the fifth embodiment of the sound processing method for reducing noise of the present invention, the recognition module includes a sound channel control unit, and the sound channel control unit is configured to control a type of the sound wave signal sent to the main control module;
the sending, according to the sound channel selection instruction, the corresponding human acoustic wave signal or/and the corresponding environment acoustic wave signal to the main control module in step S70 includes:
step S73, showing the sound channel options through the display screen, and selecting the corresponding sound channel options through the input terminal;
step S74, sending the channel control command to the channel control unit through the main control module according to the selected channel option;
step S75, obtaining, by the channel control unit according to the channel control instruction, a sound wave signal of a corresponding type from the identification module, and sending the sound wave signal of the corresponding type to the main control module.
In the detection process, the detection personnel can select different sound channels according to the specific situation at the time to acquire different sound information. For example, when an inspector needs to listen to ambient sound quietly to acquire inspection information, the inspector may wish to shield human voice from interference; when the inspector needs to communicate with the colleague, the inspector may want to temporarily shield the ambient sound and leave only the human voice in order to hear the colleague's speech. Therefore, the detection personnel can freely select different sound channels according to the needs of the detection personnel so as to acquire corresponding sound information.
Based on the fifth embodiment of the sound processing method for reducing noise of the present invention, in the sixth embodiment of the sound processing method for reducing noise of the present invention, the sound wave signal includes a human sound wave signal, an environmental sound wave signal, and a combined sound wave signal;
the sound channel options comprise a human sound channel, an environment sound channel and a comprehensive sound channel; the human voice sound channel corresponds to the human voice sound wave signal, the environment sound channel corresponds to the environment sound wave signal, and the comprehensive sound channel corresponds to the comprehensive sound wave signal; the comprehensive sound wave signal is a mixed sound wave signal containing the human sound wave signal and the environment sound wave signal.
In the present invention, at least three channels are included, which correspond to a single ambient sound, a single human voice, and a mixed sound of the ambient sound and the human voice, respectively. When the detecting person neither wants to miss the monitoring of the environmental sound nor needs to listen to the conversation of the colleague, the comprehensive sound channel can be selected, and the sound obtained by the detecting person at this time comprises the environmental sound and the human sound.
In a seventh embodiment of the sound processing method for reducing noise of the present invention, based on any one of the first to sixth embodiments thereof, the calculation formula of the adjustment coefficient is as follows:
wherein q is the adjustment coefficient; a is the maximum amplitude value of the sound wave signal in each frame; b is the maximum threshold; and when a-b is less than or equal to 0, q is 1.
According to the above formula, when the maximum amplitude value exceeds the maximum threshold, the main control module adjusts the maximum amplitude value to be consistent with the maximum threshold through the adjustment coefficient, so as to ensure that the hearing of the detecting person is not damaged. And when the maximum amplitude value is smaller than or equal to the maximum threshold value, the sound volume at the moment is in accordance with the health standard, and the adjustment is not needed, so the adjustment coefficient q is 1.
In an eighth embodiment of the sound processing method for reducing noise of the present invention, based on the third embodiment of the sound processing method for reducing noise of the present invention, the sampling frequency option includes at least one of 8kHz, 11.025kHz, 22.05kHz, 16kHz, 37.8kHz, 44.1kH, or 48 kHz. The different sampling frequencies have different degrees of restitution of the collected sound, and the detection personnel can select different sampling frequencies according to actual requirements so as to obtain the desired sound effect.
In accordance with any one of the second to sixth embodiments of the sound processing method for reducing noise of the present invention, in a ninth embodiment of the sound processing method for reducing noise of the present invention, the sound processing system for reducing noise further includes a storage module; the storage module is in signal connection with the radio module;
after the sound receiving module picks up the sound wave signal according to the preset frequency instruction in the step S30, the method further includes:
step S80, the picked sound wave signal is sent to the storage module through the sound receiving module.
Further, after the step S80, the method further includes:
step S90, converting the received sound wave signal into a specified format;
and step S100, newly creating a folder, identifying the creating time of the folder, and storing the sound wave signal converted into the specified format into the folder.
Through setting up storage module, can keep for a long time the sound wave signal to later stage is transferred and is got.
In addition, in order to achieve the above object, the present invention also provides a sound processing system for reducing noise, which applies the steps in any one of the above methods;
the sound processing system for reducing noise comprises a radio module, a main control module and a playing module which are in signal connection in sequence.
Preferably, the sound processing system for reducing noise further comprises a storage module, an identification module, a display screen and an input terminal; the storage module is in signal connection with the radio module; the identification module is in signal connection with the radio receiving module and the main control module respectively and comprises a sound channel control unit; the display screen and the input terminal are in signal connection with the main control module.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. A sound processing method for reducing noise, characterized by being applied to a sound processing system for reducing noise; the sound processing system for reducing noise comprises a radio module, a main control module and a playing module which are in signal connection in sequence;
the sound processing method for reducing noise includes the steps of:
receiving the sound wave signals collected by the sound receiving module through the main control module, comparing the maximum amplitude value of each frame of sound wave signals with the maximum threshold value of the amplitude value, and calculating an adjusting coefficient according to the proportion that the maximum amplitude value of each frame of sound wave signals exceeds the maximum threshold value;
and adjusting the amplitude of the sound wave signal in the corresponding frame according to the adjusting coefficient through the main control module, and sending the adjusted sound wave signal to the playing module.
2. The sound processing method according to claim 1, wherein before the step of receiving, by the main control module, the sound wave signal collected by the sound receiving module, comparing the maximum amplitude value of each frame of the sound wave signal with a maximum threshold of the amplitude value, and calculating the adjustment coefficient according to a ratio of the maximum amplitude value of each frame of the sound wave signal exceeding the maximum threshold, the method further comprises:
picking up the sound wave signals through the radio module according to a preset frequency instruction, and sending the picked sound wave signals to the main control module;
and dividing the sound wave signal into a plurality of frames by the main control module according to the sound wave sequence number.
3. The sound processing method for reducing noise according to claim 2, wherein the sound processing system for reducing noise further comprises a display screen and an input terminal, both of which are in signal connection with the main control module;
before the step of picking up the sound wave signal according to a preset frequency instruction through the radio module, the method further comprises the following steps:
displaying sampling frequency options through the display screen, and selecting corresponding sampling frequency options through the input terminal;
and sending the preset frequency instruction to the radio module through the main control module according to the selected corresponding sampling frequency option.
4. The sound processing method for reducing noise according to claim 3, wherein the sound processing system for reducing noise further comprises an identification module; the identification module is respectively in signal connection with the radio receiving module and the main control module;
the method comprises the following steps of receiving sound wave signals collected by the sound receiving module through the main control module, comparing the maximum amplitude value of each frame of sound wave signals with the maximum threshold value of the amplitude value, and calculating an adjusting coefficient according to the proportion that the maximum amplitude value of each frame of sound wave signals exceeds the maximum threshold value, and further comprising the following steps of:
and judging and respectively extracting a human sound wave signal and an environment sound wave signal in the sound wave signals through the identification module, and sending the corresponding human sound wave signal or/and the environment sound wave signal to the main control module according to a sound channel selection instruction.
5. The sound processing method for reducing noise according to claim 4, wherein the recognition module comprises a sound channel control unit for controlling a type of the sound wave signal transmitted to the main control module;
the step of sending the corresponding human sound wave signal or/and the environment sound wave signal to the main control module according to the sound channel selection instruction comprises the following steps:
displaying the sound channel options through the display screen, and selecting the corresponding sound channel options through the input terminal;
sending the sound channel control instruction to the sound channel control unit through the main control module according to the selected sound channel option;
and acquiring the corresponding type of sound wave signals from the identification module according to the sound channel control instruction through the sound channel control unit, and sending the corresponding type of sound wave signals to the main control module.
6. The sound processing method for reducing noise according to claim 5, wherein the sound wave signal includes a human sound wave signal, an ambient sound wave signal, and a synthetic sound wave signal;
the sound channel options comprise a human sound channel, an environment sound channel and a comprehensive sound channel; the human voice sound channel corresponds to the human voice sound wave signal, the environment sound channel corresponds to the environment sound wave signal, and the comprehensive sound channel corresponds to the comprehensive sound wave signal; the comprehensive sound wave signal is a mixed sound wave signal containing the human sound wave signal and the environment sound wave signal.
7. The sound processing method for reducing noise according to any one of claims 1 to 6, wherein the adjustment coefficient is calculated by the following formula:
wherein q is the adjustment coefficient; a is the maximum amplitude value of the sound wave signal in each frame; b is the maximum threshold; and when a-b is less than or equal to 0, q is 1.
8. The sound processing method for reducing noise according to claim 3, wherein the sampling frequency option comprises at least one of 8kHz, 11.025kHz, 22.05kHz, 16kHz, 37.8kHz, 44.1kH, or 48 kHz.
9. The sound processing method for reducing noise according to any one of claims 2 to 6, wherein the sound processing system for reducing noise further comprises a storage module; the storage module is in signal connection with the radio module;
after the step of picking up the sound wave signal according to a preset frequency instruction through the radio module, the method further comprises the following steps:
and sending the picked sound wave signal to the storage module through the sound receiving module.
10. A sound processing system for reducing noise, wherein the sound processing system for reducing noise employs the steps of the method of any one of claims 1-9;
the sound processing system for reducing noise comprises a main control module and a playing module, wherein the main control module is in signal connection with the playing module.
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