CN113808566A - Vibration noise processing method, device, electronic device and storage medium - Google Patents
Vibration noise processing method, device, electronic device and storage medium Download PDFInfo
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/175—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound
- G10K11/178—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase
- G10K11/1785—Methods, e.g. algorithms; Devices
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/175—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound
- G10K11/178—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase
- G10K11/1787—General system configurations
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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
- H04R1/10—Earpieces; Attachments therefor ; Earphones; Monophonic headphones
- H04R1/1083—Reduction of ambient noise
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K2210/00—Details of active noise control [ANC] covered by G10K11/178 but not provided for in any of its subgroups
- G10K2210/10—Applications
- G10K2210/108—Communication systems, e.g. where useful sound is kept and noise is cancelled
- G10K2210/1081—Earphones, e.g. for telephones, ear protectors or headsets
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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
- H04R2460/00—Details of hearing devices, i.e. of ear- or headphones covered by H04R1/10 or H04R5/033 but not provided for in any of their subgroups, or of hearing aids covered by H04R25/00 but not provided for in any of its subgroups
- H04R2460/01—Hearing devices using active noise cancellation
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Abstract
The embodiment of the application discloses a vibration noise processing method and device, electronic equipment and a storage medium. The method comprises the following steps: acquiring a vibration noise signal, wherein the vibration noise signal is a signal generated by a printed circuit board assembly and collected by a sound collection device, and the sound collection device is arranged on the printed circuit board assembly; acquiring a cancellation signal with a phase opposite to that of the vibration noise signal based on the vibration noise signal; playing the cancellation signal. By the method, the vibration noise signal and the offset signal are offset, so that the interference of the vibration noise generated by the printed circuit board assembly to a user can be effectively eliminated, and the user experience is improved.
Description
Technical Field
The application belongs to the technical field of noise reduction, and particularly relates to a vibration noise processing method and device, electronic equipment and a storage medium.
Background
Some printed circuit boards may be included in the electronic device, and some components in the printed circuit boards may generate vibration noise due to vibration, and the generated vibration noise may interfere with a user and reduce user experience.
Disclosure of Invention
In view of the above problems, the present application provides a vibration noise processing method, apparatus, electronic device, and storage medium to achieve an improvement of the above problems.
In a first aspect, an embodiment of the present application provides a vibration noise processing method, which is applied to an electronic device, and the method includes: acquiring a vibration noise signal, wherein the vibration noise signal is a signal generated by a printed circuit board assembly and collected by a sound collection device, and the sound collection device is arranged on the printed circuit board assembly; acquiring a cancellation signal with a phase opposite to that of the vibration noise signal based on the vibration noise signal; playing the cancellation signal.
In a second aspect, an embodiment of the present application provides a vibration noise processing apparatus, which is operated in an electronic device, and includes: the noise signal acquisition unit is used for acquiring a vibration noise signal, wherein the vibration noise signal is a signal generated by a printed circuit board assembly and acquired by a sound acquisition device, and the sound acquisition device is arranged on the printed circuit board assembly; a cancellation signal acquisition unit configured to acquire a cancellation signal having a phase opposite to that of the vibration noise signal based on the vibration noise signal; and the playing unit is used for playing the counteracting signal.
In a third aspect, an embodiment of the present application provides an electronic device, including a sound collection apparatus, a sound playing apparatus, one or more processors, and a memory; the sound collection device is used for collecting vibration noise signals, the vibration noise signals are signals generated by the printed circuit board assembly, and the sound collection device is arranged on the printed circuit board assembly; the sound playing device is used for playing the cancellation signal; one or more programs, wherein the one or more programs are stored in the memory and configured to be executed by the one or more processors, the one or more programs configured to perform the methods described above.
In a fourth aspect, the present application provides a computer-readable storage medium, in which a program code is stored, wherein the program code performs the above-mentioned method when running.
The embodiment of the application provides a vibration noise processing method and device, electronic equipment and a storage medium. Firstly, a vibration noise signal is obtained, wherein the vibration noise signal is a signal generated by a printed circuit board assembly collected by a sound collection device, the sound collection device is arranged on the printed circuit board assembly, then a cancellation signal with a phase opposite to that of the vibration noise signal is obtained based on the vibration noise signal, and finally the cancellation signal is played. By the method, the vibration noise signal and the offset signal are offset, so that the interference of the vibration noise generated by the printed circuit board assembly to a user can be effectively eliminated, and the user experience is improved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic view illustrating an application scenario of a vibration noise processing method according to an embodiment of the present application;
FIG. 2 is a flow chart illustrating a method for vibration noise processing according to an embodiment of the present application;
FIG. 3 is a flow chart illustrating a method of vibration noise processing according to another embodiment of the present application;
FIG. 4 illustrates an acoustic response diagram according to another embodiment of the present application;
fig. 5 shows a frequency response diagram according to another embodiment of the present application;
fig. 6 shows a frequency response diagram according to another embodiment of the present application;
fig. 7 is a flow chart illustrating a vibration noise processing method according to still another embodiment of the present application;
fig. 8 is a flowchart illustrating a step S320 in a vibration noise processing method according to still another embodiment of the present application;
fig. 9 is a flow chart illustrating a vibration noise processing method according to still another embodiment of the present application;
fig. 10 is a block diagram showing a configuration of a vibration noise processing apparatus according to an embodiment of the present application;
fig. 11 is a block diagram showing a configuration of a vibration noise processing apparatus according to an embodiment of the present application;
fig. 12 is a block diagram showing an electronic device for executing the vibration noise processing method according to the embodiment of the present application in real time;
fig. 13 illustrates a storage unit for storing or carrying program codes for implementing the vibration noise processing method according to the embodiment of the present application in real time.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
With the emergence and popularization of various intelligent electronic devices, earphones have become a very important electronic device accessory in people's daily life. But the noisy environment can greatly reduce the accuracy of receiving sound information by using the earphone, and is particularly suitable for business people who frequently go on a business trip and take planes, office workers who crowd subways and buses and office workers in a central air-conditioning room. Therefore, the demand for noise reduction headphones is also rapidly increasing.
In the research on the related vibration noise processing method, the inventor finds that some printed circuit boards may be included in the electronic device, some components in the printed circuit boards may generate vibration noise due to vibration, and the generated vibration noise may interfere with a user and reduce the user experience. Illustratively, when the bluetooth headset is connected with the electronic device through bluetooth, the bluetooth headset may transmit a radio frequency signal every 1.25ms, and when transmitting the radio frequency signal, the power of the bluetooth headset is large, thereby causing a power current to be drawn every 1.25ms, so that a battery power ripple cycle of the bluetooth headset is 1.25ms, that is, the frequency is 800Hz, thereby forming a ripple signal with 800Hz as a fundamental frequency, and further, on a battery-related power line and a signal line interfered by the battery-related power line, there may be a ripple signal with 800Hz as a fundamental frequency, so that a capacitor/inductor on the related line may generate vibration noise. The ripple is a phenomenon caused by voltage fluctuation of the dc regulated power supply, because the dc regulated power supply is generally formed by rectifying and stabilizing an ac power supply, and so on, which inevitably has some ac components in the dc regulated power supply, and this ac component superimposed on the dc regulated power supply is called the ripple.
In addition, a switching power supply circuit such as a DC-DC voltage conversion circuit is provided in a circuit of the bluetooth headset, and if the modulation frequency of the switching power supply circuit is within 20Hz to 20KHz, the inductance/capacitance may vibrate, and vibration noise may be generated. The related solution is to change the capacitance in the Bluetooth earphone into a bottom noise capacitance and change the inductance into a shielding inductance; alternatively, the modulation frequency of a switching power supply circuit such as a DC-DC voltage conversion circuit is changed. This leads to an increase in cost and the vibration noise cannot be completely eliminated.
Therefore, the inventor has provided the first vibration noise signal that acquires in this application, the vibration noise signal is the signal that the printed circuit board subassembly that the sound collection system gathered produced, wherein, the sound collection system set up in on the printed circuit board subassembly, then based on the vibration noise signal, acquire the cancellation signal opposite with vibration noise signal phase, play the cancellation signal at last, let vibration noise signal and cancellation signal cancel each other, can effectively eliminate the vibration noise that printed circuit board subassembly produced to user's interference, promote user experience's vibration noise processing method, device, electronic equipment and storage medium.
The following is an introduction of an application environment of the vibration noise processing method provided by the embodiment of the invention:
referring to fig. 1, the vibration noise Processing method of the present invention can be applied to an active noise reduction system 100, and the active noise reduction system 100 can include a sound collection device 110, an analog-to-Digital converter 120, a Digital Signal Processing (DSP) chip 130, a Digital-to-analog converter 140, and a sound playing device 150.
The sound collection device 110 may be configured to collect a vibration noise signal and convert the vibration noise signal into an analog electrical signal. After the vibration noise signal is converted into an analog electrical signal by the sound collection device 110, the sound collection device 110 may transmit the analog electrical signal to the analog-to-digital converter 120. In the embodiment of the present application, the sound collection device 110 may be a microphone, a sensor, or the like capable of collecting a sound signal.
An analog-to-digital converter, or ADC for short, generally refers to an electronic component that converts an analog signal into a digital signal. A typical analog-to-digital converter converts an input voltage signal into an output digital signal. Since digital signals do not have practical significance per se, only one relative magnitude is represented. Therefore, any analog-to-digital converter needs a reference analog quantity as a conversion standard, and a common reference standard is the maximum convertible signal size. And the output digital quantity represents the magnitude of the input signal relative to the reference signal. In the embodiment of the present application, the analog-to-digital converter 120 may be configured to receive an analog electrical signal sent by the sound collection device 110 and convert the analog electrical signal into a digital signal. After the analog-to-digital converter 120 converts the analog electrical signal into a digital signal, the digital signal may be sent to the digital signal processing chip 130.
The digital signal processing chip 130 may be configured to perform digital signal processing on the digital signal to obtain a cancellation signal with a phase opposite to that of the vibration noise signal. In the embodiments of the present application, a digital signal processing chip refers to a chip capable of implementing digital signal processing technology. The digital signal processing chip adopts a Harvard structure with separated programs and data, is provided with a special hardware multiplier, widely adopts pipeline operation, provides special DSP instructions, and can be used for quickly realizing various digital signal processing algorithms. The digital signal processing is to use a computer or a special processing device to acquire, transform, filter, estimate, enhance, compress, identify and the like the signal in a digital form so as to obtain a signal form meeting the needs of people.
The digital-to-analog converter 140 may be configured to receive the cancellation signal sent by the digital signal processing chip 130 and convert the cancellation signal into an electrical signal. Digital-to-analog converters, also called D/a converters, DAC for short, are devices that convert digital quantities into analog quantities. The D/a converter is basically composed of 4 parts, namely a weight resistor network, an operational amplifier, a reference power supply and an analog switch.
The sound playing device 150 may be configured to convert the electrical signal sent by the digital-to-analog converter into a sound wave with a phase opposite to that of the vibration noise signal for playing. The sound playing device 150 may be a speaker.
Embodiments of the present application will be described in detail below with reference to the accompanying drawings.
Referring to fig. 2, a vibration noise processing method provided in an embodiment of the present application is applied to an electronic device, and the method includes:
step S110: and acquiring a vibration noise signal, wherein the vibration noise signal is a signal generated by a printed circuit board assembly acquired by a sound acquisition device, and the sound acquisition device is arranged on the printed circuit board assembly.
In the embodiment of the present application, the sound collection device may be a bone conduction microphone or a gravity sensor, which may pick up a vibration signal.
Bone conduction is a sound conduction mode, namely, sound is converted into mechanical vibration with different frequencies, and sound waves are transmitted through the skull, the bone labyrinth, the lymph fluid of the inner ear, the spiral organ and the auditory center of a human body. Compared with a classical sound conduction mode of generating sound waves through a vibrating diaphragm, the bone conduction mode omits a plurality of sound wave transmission steps, can realize clear sound restoration in a noisy environment, and does not influence other people due to the fact that the sound waves are diffused in the air. The bone conduction technology is classified into a bone conduction speaker technology and a bone conduction microphone technology. In the embodiment of the present application, the bone conduction microphone may also be called a bone conduction sensor, and the bone conduction microphone may collect signals generated by the printed circuit board assembly through the bone conduction microphone technology.
As one mode, the electronic device may include a first sound collection device and a second sound collection device, and the first sound collection device may be disposed at any position of the Printed Circuit Board Assembly for collecting a signal generated by vibration of the Printed Circuit Board Assembly, that is, a Printed Circuit Board Assembly (PCBA) vibration noise. Since the PCBA vibration noise is an inherent noise of ground noise, when the first sound collection device is disposed at any position of the printed circuit board assembly, it is possible to determine whether the signal is the PCBA vibration noise by detecting the signal for a certain period of time, and determine that the signal is the PCBA vibration noise if the signal for the certain period of time is a stable signal. It should be noted that, the sound collection device in the embodiment of the present application is a first sound collection device, that is, a newly added sound collection device, and the second sound collection device is an original sound collection device of the electronic device. The original sound collecting device (namely, the microphone) in the electronic equipment is used for collecting the voice of a user speaking, the sound outside the electronic equipment is collected, the newly-added sound collecting device arranged on the printed circuit board assembly is used for collecting vibration noise signals generated when a capacitor/inductor on the printed circuit board assembly vibrates, and the vibration noise signals generated inside the electronic equipment are collected.
Optionally, the first sound collection device may also be disposed near the human face or the ear where the human face is not close to the ear, so as to prevent the human face from transmitting the human face and the like, thereby preventing the signal pickup generated on the printed circuit board assembly from being disturbed.
Of course, the first sound collection device may be disposed near the human face or the ears of the human being capable of transmitting the speech of the human being. If the first sound collection device is arranged near the human face or the ear of a person capable of transmitting the speaking sound of the person, because the vibration signal generated by speaking is obviously smaller than the vibration signal generated by vibration of the printed circuit board assembly, a signal threshold value can be preset, and then whether the current signal is the PCBA vibration noise signal generated by the printed circuit board assembly can be detected in real time. When detecting whether the current signal is a PCBA vibration noise signal generated by vibration of the printed circuit board assembly, it may be determined whether the current signal is the PCBA vibration noise signal generated by vibration of the printed circuit board assembly according to the signal strength of the current signal and the signal threshold, and then it may be determined whether the current signal is collected by the first sound collecting device or the current signal is collected by the second sound collecting device, where the signal threshold may be a signal strength value representing that the signal is the PCBA vibration noise signal generated by vibration of the printed circuit board assembly. Specifically, when the signal intensity of the current signal is smaller than the signal threshold, determining that the current signal is not PCBA vibration noise generated by vibration of the printed circuit board assembly, and collecting the current signal through the second sound collecting device; when the signal intensity of the current signal is greater than or equal to the signal threshold value, the current signal is determined to be PCBA vibration noise generated by vibration of the printed circuit board assembly, and the current signal is collected through the first sound collection device.
When the sound collection device arranged on the printed circuit board assembly collects the signals generated by the printed circuit board assembly, the sound collection device can periodically or real-timely collect the signals generated by the printed circuit board assembly, and can start to collect the signals only when detecting that the signals are generated on the printed circuit board assembly. When the printed circuit board assembly is detected to generate signals, the sound collection device starts to collect vibration signals, corresponding signal identifiers can be set for the signals generated by different assemblies of the electronic equipment in advance, and then the signals generated by the assemblies can be determined through the detected signal identifiers. Specifically, the identifier of the signal generated on the printed circuit board assembly can be set to be "Y", and when the signal detection device detects the signal with the identifier of "Y", the signal can be determined to be generated for the printed circuit board assembly, and then the signal detection device can send a trigger signal to the sound collection device, so that the trigger sound collection device can start to collect the signal generated on the printed circuit board assembly. Of course, the signal identifier may be a character or a character string in a customized specific format, and is not limited in detail herein.
Of course, the electronic device can acquire the vibration noise signal acquired by the sound acquisition device in real time, and when the signal generated by the printed circuit board assembly is acquired by the sound acquisition device, the signal can be converted into an analog electrical signal, and then the analog electrical signal can be sent to the analog-to-digital converter for signal conversion.
Step S120: based on the vibration noise signal, a cancellation signal is obtained that is in phase opposition to the vibration noise signal.
Since sound is propagated in the form of waves through a medium such as air, and such vibrations have a certain direction and amplitude, in the embodiment of the present application, after the vibration Noise signal is obtained by the above method, a Cancellation signal opposite to the vibration direction of the vibration Noise signal can be obtained by digital signal processing using the ANC (Active Noise Cancellation) technical principle. The principle of the active noise reduction technology is that all sounds are composed of a certain frequency spectrum, and if a sound can be found, the frequency spectrum is identical to the noise to be eliminated, and the noise can be completely cancelled only by the fact that the phases are just opposite (different by 180 degrees). Generally, there are two methods for headphone noise reduction, namely active noise reduction and passive noise reduction. Active noise reduction is a noise reduction technology, and is one of the methods applied to noise reduction of earphones. The active noise reduction function is to generate reverse sound waves equal to external noise through a noise reduction system to neutralize the noise, so that the noise reduction effect is realized.
As one mode, a next-stage vibration noise signal to be generated on the printed circuit board assembly may be predicted within a target time period according to a currently acquired vibration noise signal, and a cancellation signal in a direction opposite to the predicted vibration direction of the next-stage vibration noise signal may be generated.
The preset duration can be set based on the smoothness duration of the generated vibration noise signal under the influence of the ripple signal of the same frequency of the printed circuit board assembly. That is, under the action of the ripple signal of the same frequency, the vibration noise signal will not change rapidly within a period of time, so if the next vibration noise signal to be generated can be predicted within the period of time, the cancellation signal with opposite vibration direction can be generated in advance, so that the cancellation can be completed before the next vibration noise signal reaches the human ear. For example, if it is known through testing that the vibration noise signal does not change rapidly within 30 to 100 milliseconds, if the next vibration noise signal to be generated can be predicted within 30 to 100 milliseconds, a cancellation signal with an opposite phase can be generated in advance, so as to achieve the effect of completely eliminating the vibration noise signal. That is, the embodiment of the present application adopts a pre-determining mechanism to pre-determine the future noise to be generated, and generates the cancellation signal with the opposite phase of the future noise signal in advance, so as to complete cancellation before the next wave noise reaches the ears of the human body.
The next-stage vibration noise signal to be generated by the printed circuit board assembly may be predicted based on a deep learning technique, or may be predicted by using a model such as a Gaussian Mixture Model (GMM), a Hidden Markov Model (HMM), a Principal Component Analysis (PCA), and the like, which is not specifically limited in this embodiment of the present invention.
Step S130: playing the cancellation signal.
After the offset signal opposite to the vibration direction of the vibration noise signal is obtained by the method, the offset signal is played through a loudspeaker (also called a loudspeaker) of the electronic equipment to eliminate the vibration noise, so that the vibration noise cannot be sensed at the ear of a human body.
The application provides a vibration noise processing method, at first acquire the vibration noise signal, the vibration noise signal is the signal that the printed circuit board subassembly that the sound collection system gathered produced, wherein, the sound collection system set up in on the printed circuit board subassembly, then based on the vibration noise signal, acquire the cancellation signal opposite with vibration noise signal phase place, play the cancellation signal at last. By the method, the vibration noise signal and the offset signal are offset, so that the interference of the vibration noise generated by the printed circuit board assembly to a user can be effectively eliminated, and the user experience is improved.
Referring to fig. 3, a vibration noise processing method provided in an embodiment of the present application is applied to an electronic device, and the method includes:
step S210: and acquiring a vibration noise signal, wherein the vibration noise signal is a signal generated by a printed circuit board assembly acquired by a sound acquisition device, and the sound acquisition device is arranged on the printed circuit board assembly.
In the embodiment of the present application, the step S210 may specifically refer to the detailed explanation in the above embodiments, and therefore is not described herein.
Step S220: and acquiring a preset transfer function.
As one mode, the step of obtaining the preset transfer function includes: obtaining the preset transfer function based on the first function, the second function and the third function; the first function is a signal function representing the change condition of the corresponding signal parameter when the vibration noise signal is transmitted from a generation position to a designated position; the second function represents a signal function of the change condition of the corresponding signal parameter when the vibration noise signal is transmitted to the sound acquisition device from a generation position; and the third function represents a transfer function of the change condition of the corresponding signal parameter when the vibration noise signal is transmitted to the appointed position from the playing position.
In the embodiment of the present application, the preset transfer function is an active noise reduction transfer function, that is, an ANC transfer function, and can be obtained through laboratory debugging in a product development stage; the production place is a printed circuit board assembly; the designated position is an artificial ear, wherein the artificial ear is a tool specially used for measuring the acoustic performance of an earphone, a receiver and a telephone receiver; the sound collection device is a sensor; the playing part is a loudspeaker. FIG. 4 is a graphical illustration of the acoustic response, where in FIG. 4N is the PCBA vibration noise; FM is a sensor; the ADC is an analog-to-digital converter; the DSP is a digital signal processing chip; the DAC is a digital-to-analog converter; s is a speaker; e is an artificial ear microphone; N2E is a first function, which is a signal function representing the change condition of the corresponding PCBA vibration signal when the PCBA vibration noise is transmitted from the printed circuit board assembly to the artificial ear; n2FM is a second function, a signal function representing the change of the corresponding PCBA vibration signal when the PCBA vibration noise is transmitted from the printed circuit board assembly to the sensor; S2E is a third function, which represents the transfer function of the change situation of the PCBA vibration noise when the PCBA vibration signal is transferred from the loudspeaker to the artificial ear; f is the ANC transfer function in the digital signal processing chip.
Wherein, N2E and N2FM are signal functions which can be obtained by actual measurement; S2E can be calculated by the played frequency sweep signal. The predetermined transfer function can be obtained by the following calculation formula: N2E ═ N2FM ═ S2E ═ F, i.e.:
illustratively, when the earphone is worn on the artificial ear, and N is pink noise with a loudness of 80dB at a frequency of 20Hz to 20KHz, then FM can be picked up by the microphone and E can be picked up by the microphone of the artificial ear, as shown in fig. 5, where L1 in fig. 5 represents FM frequency response and L2 represents E frequency response. Here, pink noise is a physical concept that has equal intensity in each multiple of the wave path, i.e., has the same or similar energy in a certain range (multiple of the wave path).
So that it is possible to obtain: N2E ═ E/N, N2FM ═ FM/N; therefore, N2E/N2FM ═ E/FM.
S2E can be calculated by the following steps: the earphone plays a sweep frequency signal (represented by A) with fixed loudness of 0dB from 20Hz to 20KHz, namely, the signal loudness is a signal with fixed size (0dB) and frequency from 20Hz to 20 KHz.
When the earphone is worn on the artificial ear, the measurable frequency response curve B is shown in fig. 6, and therefore, S2E ═ B/a can be obtained; both B and A are known.
Of course, as shown above, the above is only an example, in practical applications, the vibration noise of the PCBA varies, and may be a certain signal or several signals, although the noise signals vary, the example method is consistent, and the required transfer function is independent of the signal.
Step S230: and processing the vibration noise signal based on the preset transfer function to obtain a cancellation signal with the phase opposite to that of the vibration noise signal.
In the embodiment of the present application, in order to eliminate the vibration noise of the PCBA, after the preset transfer function is obtained by the above method, the cancellation signal with the phase opposite to that of the vibration noise signal can be calculated by the preset transfer function.
Step S240: playing the cancellation signal.
In the embodiment of the present application, the step S240 may specifically refer to the detailed explanation in the above embodiments, and therefore is not described herein.
The vibration noise processing method comprises the steps of firstly obtaining a vibration noise signal, wherein the vibration noise signal is a signal generated by a printed circuit board assembly collected by a sound collection device, the sound collection device is arranged on the printed circuit board assembly, then obtaining a preset transfer function, processing the vibration noise signal based on the preset transfer function, obtaining a cancellation signal opposite to the phase of the vibration noise signal, and finally playing the cancellation signal. According to the method, the vibration noise signals are collected through the sound collection device arranged on the printed circuit board assembly, the offset signal with the phase opposite to that of the vibration noise signals is obtained through calculation according to the preset transfer function, the offset signal is played, the vibration noise signals and the offset signal are mutually overlapped and offset, the interference of the vibration noise to a user can be effectively eliminated, the noise cannot be sensed at the ear of the user, and the user experience is improved.
Referring to fig. 7, a vibration noise processing method provided in the embodiment of the present application is applied to an electronic device, and the method includes:
step S310: and acquiring a vibration noise signal, wherein the vibration noise signal is a signal generated by a printed circuit board assembly acquired by a sound acquisition device, and the sound acquisition device is arranged on the printed circuit board assembly.
In the embodiment of the present application, the step S310 may specifically refer to the detailed explanation in the above embodiments, and therefore is not described herein.
Step S320: and acquiring a cancellation signal which is equal to the vibration noise signal in amplitude and opposite in phase based on the vibration noise signal.
To completely cancel the PCBA noise signal generated by the vibration of the printed circuit board assembly, a cancellation signal may be generated that is equal in amplitude and opposite in phase to the PCBA noise signal in the following manner.
As shown in fig. 8, the specific step of step S320 may include:
step S321: and converting the vibration noise signal into a digital signal through the analog-to-digital converter.
Step S322: and carrying out digital processing on the digital signal through the digital signal processing chip to obtain a cancellation signal in a digital signal form.
Step S323: and converting the cancellation signal in the form of the digital signal into an analog signal through the digital-to-analog converter to obtain a cancellation signal which is equal to the vibration noise signal in amplitude and opposite in phase.
Specifically, after the vibration noise signal that the printed circuit board assembly vibration produced is gathered through first sound collection system, first sound collection system can give analog to digital converter with the vibration noise signal transmission who gathers, and then analog to digital converter can be digital signal with this vibration noise signal conversion to send digital signal for digital signal processing chip.
The digital signal processing chip is stored with a preset transfer function in advance, and after the digital signal processing chip receives a digital signal sent by the analog-to-digital converter, the digital signal processing chip calculates and obtains a cancellation signal in a digital signal form, wherein the cancellation signal is equal to the vibration noise signal in amplitude and opposite in phase, through the preset transfer function stored in advance.
After the offset information in the form of the digital signal which is equal to the amplitude of the vibration noise signal and opposite to the phase is obtained through the processing of the digital signal processing chip, the digital signal processing chip can send the offset signal in the form of the digital signal to the digital-to-analog converter, and then the digital-to-analog converter can convert the offset signal in the form of the digital signal into an analog signal to obtain the offset signal finally played by the loudspeaker.
Step S330: playing the cancellation signal.
In the embodiment of the present application, the step S330 may specifically refer to the detailed explanation in the above embodiments, and therefore is not described herein.
The application provides a vibration noise processing method, at first acquire the vibration noise signal, the vibration noise signal is the signal that the printed circuit board subassembly that the sound collection system gathered produced, wherein, the sound collection system sets up on printed circuit board subassembly, then based on this vibration noise signal, acquires the offset signal that equals and opposite phase place with vibration noise signal amplitude, plays this offset signal at last. By the method, the vibration noise signal and the offset signal are mutually superposed and offset, so that the interference of the vibration noise generated by the printed circuit board assembly on a user can be effectively eliminated, and the user experience is improved.
Referring to fig. 9, a vibration noise processing method provided in the embodiment of the present application is applied to an electronic device, and the method includes:
step S410: and acquiring a vibration noise signal, wherein the vibration noise signal is a signal generated by a printed circuit board assembly acquired by a sound acquisition device, and the sound acquisition device is arranged on the printed circuit board assembly.
Step S420: based on the vibration noise signal, a cancellation signal is obtained that is in phase opposition to the vibration noise signal.
In the embodiment of the present application, the step S410 and the step S420 may specifically refer to the detailed explanation in the above embodiment, and therefore are not described herein.
Step S430: if the audio signal to be played is detected.
In this embodiment of the application, the audio signal to be played may be an audio signal pre-stored in an intelligent device that establishes a bluetooth connection with an earphone, or may be a voice signal of a speaker that is collected by a second voice collecting device in real time.
The intelligent device can be a smart phone or a music player. And further, whether the audio signal to be played is detected can be determined by whether the specific operation of the smart phone or the music player by the user is detected. Specifically, when it is detected that a user triggers music playing or an audio playing program in the smart device to start running through touch operation, it may be determined that an audio signal to be played is detected. For example, it may be determined that an audio signal to be played is detected when it is detected that a user clicks a play button.
Of course, in the embodiment of the present application, the time for playing the audio signal to be played may also be preset, so that the current time may be detected in real time, and whether the current time is the time for playing the audio signal to be played is detected to determine whether the audio signal to be played is detected. Specifically, if the current time is the time for playing the audio signal to be played, it is determined that the audio signal to be played is detected; otherwise, it is determined that the audio signal to be played is not detected.
Step S440: and performing confluence operation on the audio signal to be played and the counteracting signal to obtain a target audio signal.
After the audio signal to be played is determined and detected in the above manner, the audio signal to be played and the cancellation signal generated by the above method may be subjected to a merging operation to obtain a played audio signal.
For example, if the detected audio signal to be played is signal a, the generated cancellation signal with the opposite phase to the vibration noise signal is signal B, and the signal a and the signal B are merged, the signal a and the signal B are merged into one signal, i.e., the target audio signal. By the method, the interference of the vibration noise generated by the printed circuit board assembly to the played audio can be reduced.
Step S450: and playing the target audio signal.
After the target audio signal is obtained by the method, the target audio signal is played through the loudspeaker.
The application provides a vibration noise processing method, at first acquire the vibration noise signal, the vibration noise signal is the signal that the printed circuit board subassembly that the sound collection system gathered produced, wherein, the sound collection system sets up on the printed circuit board subassembly, based on the vibration noise signal, acquires the cancellation signal opposite with the vibration noise signal phase place, if detect and wait to broadcast audio signal, will wait to broadcast audio signal and cancellation signal and carry out the confluence operation, obtain the target audio signal, broadcast this target audio signal. By the method, the interference of the noise signal carried in the audio signal to be played to the user can be effectively eliminated, and the user experience is improved.
Referring to fig. 10, in an electronic device, a vibration noise processing apparatus 500 according to an embodiment of the present application is provided, where the apparatus 500 includes:
a noise signal obtaining unit 510 for obtaining a vibration noise signal, which is a signal generated by a printed circuit board assembly collected by a sound collecting device, wherein the sound collecting device is disposed on the printed circuit board assembly.
A cancellation signal obtaining unit 520, configured to obtain a cancellation signal with a phase opposite to that of the vibration noise signal based on the vibration noise signal.
As one mode, the offset signal obtaining unit 520 is configured to obtain a preset transfer function; and processing the vibration noise signal based on the preset transfer function to obtain a cancellation signal with the phase opposite to that of the vibration noise signal.
The step of obtaining the preset transfer function includes: obtaining the preset transfer function based on the first function, the second function and the third function; the first function is a signal function representing the change condition of the corresponding signal parameter when the vibration noise signal is transmitted from a generation position to a designated position; the second function represents a signal function of the change condition of the corresponding signal parameter when the vibration noise signal is transmitted to the sound acquisition device from a generation position; and the third function represents a transfer function of the change condition of the corresponding signal parameter when the vibration noise signal is transmitted to the appointed position from the playing position.
Alternatively, the cancellation signal obtaining unit 520 is configured to obtain a cancellation signal with an amplitude equal to and a phase opposite to the vibration noise signal based on the vibration noise signal.
Specifically, the offset signal obtaining unit 520 is configured to convert the vibration noise signal into a digital signal through the analog-to-digital converter; carrying out digital processing on the digital signal through the digital signal processing chip to obtain a cancellation signal in a digital signal form; and converting the cancellation signal in the form of the digital signal into an analog signal through the digital-to-analog converter to obtain a cancellation signal which is equal to the vibration noise signal in amplitude and opposite in phase.
A playing unit 530, configured to play the cancellation signal.
Referring to fig. 11, the apparatus 500 further includes:
a merging unit 540, configured to, if an audio signal to be played is detected; performing confluence operation on the audio signal to be played and the offset signal to obtain a target audio signal; and playing the target audio signal.
It should be noted that the device embodiment and the method embodiment in the present application correspond to each other, and specific principles in the device embodiment may refer to the contents in the method embodiment, which is not described herein again.
An electronic device provided by the present application will be described below with reference to fig. 12.
Referring to fig. 12, based on the above-mentioned vibration noise processing method and apparatus, another electronic device 800 capable of performing the above-mentioned vibration noise processing method is provided in the embodiments of the present application. The electronic device 800 includes the sound collection apparatus 110, the sound playing apparatus 150, one or more processors 802 (only one is shown) coupled to each other, a memory 804, and a network module 806. The memory 804 stores programs that can execute the content of the foregoing embodiments, and the processor 802 can execute the programs stored in the memory 804.
The sound collection device 110 is used to collect a vibration noise signal, in this embodiment, the sound collection device 110 may be a microphone, a sensor, or other devices capable of collecting a sound signal.
The sound playing device 150 may be configured to convert the electrical signal sent by the digital-to-analog converter into a sound wave with a phase opposite to that of the vibration noise signal for playing. The sound playing device 150 may be a speaker.
The processor 802 may include one or more processing cores. The processor 802 interfaces with various components throughout the electronic device 800 using various interfaces and circuitry to perform various functions of the electronic device 800 and process data by executing or executing instructions, programs, code sets, or instruction sets stored in the memory 804 and invoking data stored in the memory 804. Alternatively, the processor 802 may be implemented in hardware using at least one of Digital Signal Processing (DSP), Field-Programmable Gate Array (FPGA), and Programmable Logic Array (PLA). The processor 802 may integrate one or more of a Central Processing Unit (CPU), a Graphics Processing Unit (GPU), a modem, and the like. Wherein, the CPU mainly processes an operating system, a user interface, an application program and the like; the GPU is used for rendering and drawing display content; the modem is used to handle wireless communications. It is understood that the modem may not be integrated into the processor 802, but may be implemented by a single communication chip.
The Memory 804 may include a Random Access Memory (RAM) or a Read-Only Memory (ROM). The memory 804 may be used to store instructions, programs, code, sets of codes, or sets of instructions. The memory 804 may include a stored program area and a stored data area, wherein the stored program area may store instructions for implementing an operating system, instructions for implementing at least one function (such as a touch function, a sound playing function, an image playing function, etc.), instructions for implementing various method embodiments described below, and the like. The stored data area may also store data created by the terminal 800 during use (e.g., phone books, audio-visual data, chat log data), and the like.
The network module 806 is configured to receive and transmit electromagnetic waves, and achieve interconversion between the electromagnetic waves and the electrical signals, so as to communicate with a communication network or other devices, for example, an audio playing device. The network module 806 may include various existing circuit elements for performing these functions, such as an antenna, a radio frequency transceiver, a digital signal processor, an encryption/decryption chip, a Subscriber Identity Module (SIM) card, memory, and so forth. The network module 806 may communicate with various networks, such as the internet, an intranet, a wireless network, or with other devices via a wireless network. The wireless network may comprise a cellular telephone network, a wireless local area network, or a metropolitan area network. For example, the network module 806 can interact with the base station.
Referring to fig. 13, a block diagram of a computer-readable storage medium according to an embodiment of the present application is shown. The computer-readable medium 900 has stored therein program code that can be called by a processor to perform the methods described in the above-described method embodiments.
The computer-readable storage medium 900 may be an electronic memory such as a flash memory, an EEPROM (electrically erasable programmable read only memory), an EPROM, a hard disk, or a ROM. Alternatively, the computer-readable storage medium 900 includes a non-volatile computer-readable storage medium. The computer readable storage medium 900 has storage space for program code 910 to perform any of the method steps of the method described above. The program code can be read from or written to one or more computer program products. The program code 910 may be compressed, for example, in a suitable form.
The application provides a vibration noise processing method, device, electronic equipment and storage medium, at first acquire the vibration noise signal, the vibration noise signal is the signal that the printed circuit board subassembly that the sound collection system gathered produced, wherein, the sound collection system set up in on the printed circuit board subassembly, then based on the vibration noise signal, acquire the cancellation signal opposite with vibration noise signal phase place, play the cancellation signal at last. By the method, the vibration noise signal and the offset signal are mutually superposed and offset, so that the interference of the vibration noise generated by the printed circuit board assembly on a user can be effectively eliminated, and the user experience is improved.
While the present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, which are illustrative and not restrictive, and it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (10)
1. A vibration noise processing method is applied to an electronic device, and the method comprises the following steps:
acquiring a vibration noise signal, wherein the vibration noise signal is a signal generated by a printed circuit board assembly and collected by a sound collection device, and the sound collection device is arranged on the printed circuit board assembly;
acquiring a cancellation signal with a phase opposite to that of the vibration noise signal based on the vibration noise signal;
playing the cancellation signal.
2. The method of claim 1, wherein said obtaining a cancellation signal in phase opposition to the vibration noise signal based on the vibration noise signal comprises:
acquiring a preset transfer function;
and processing the vibration noise signal based on the preset transfer function to obtain a cancellation signal with the phase opposite to that of the vibration noise signal.
3. The method of claim 2, wherein the obtaining the preset transfer function comprises:
obtaining the preset transfer function based on the first function, the second function and the third function;
the first function is a signal function representing the change condition of the corresponding signal parameter when the vibration noise signal is transmitted from a generation position to a designated position;
the second function represents a signal function of the change condition of the corresponding signal parameter when the vibration noise signal is transmitted to the sound acquisition device from a generation position;
and the third function represents a transfer function of the change condition of the corresponding signal parameter when the vibration noise signal is transmitted to the appointed position from the playing position.
4. The method of claim 1, wherein said obtaining a cancellation signal in phase opposition to the vibration noise signal based on the vibration noise signal comprises:
and acquiring a cancellation signal which is equal to the vibration noise signal in amplitude and opposite in phase based on the vibration noise signal.
5. The method of claim 4, wherein the electronic device comprises an analog-to-digital converter, a digital signal processing chip, and a digital-to-analog converter, and the obtaining a cancellation signal having an equal amplitude and an opposite phase to the vibration noise signal based on the vibration noise signal comprises:
converting the vibration noise signal into a digital signal through the analog-to-digital converter;
carrying out digital processing on the digital signal through the digital signal processing chip to obtain a cancellation signal in a digital signal form;
and converting the cancellation signal in the form of the digital signal into an analog signal through the digital-to-analog converter to obtain a cancellation signal which is equal to the vibration noise signal in amplitude and opposite in phase.
6. The method of claim 1, further comprising:
if the audio signal to be played is detected;
performing confluence operation on the audio signal to be played and the offset signal to obtain a target audio signal;
and playing the target audio signal.
7. The method according to any one of claims 1 to 6, wherein the sound collection device is a bone conduction microphone or a gravity sensor.
8. A vibration noise processing apparatus, operable with an electronic device, the apparatus comprising:
the noise signal acquisition unit is used for acquiring a vibration noise signal, wherein the vibration noise signal is a signal generated by a printed circuit board assembly and acquired by a sound acquisition device, and the sound acquisition device is arranged on the printed circuit board assembly;
a cancellation signal acquisition unit configured to acquire a cancellation signal having a phase opposite to that of the vibration noise signal based on the vibration noise signal;
and the playing unit is used for playing the counteracting signal.
9. An electronic device, comprising a sound collection device, a sound playback device, one or more processors, and a memory; the sound collection device is used for collecting vibration noise signals, the vibration noise signals are signals generated by the printed circuit board assembly, and the sound collection device is arranged on the printed circuit board assembly; the sound playing device is used for playing the cancellation signal;
one or more programs, wherein the one or more programs are stored in the memory and configured to be executed by the one or more processors, the one or more programs configured to perform the method of any of claims 1-8.
10. A computer-readable storage medium, having program code stored therein, wherein the program code when executed by a processor performs the method of any of claims 1-8.
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