CN113808566B - Vibration noise processing method and device, electronic equipment and storage medium - Google Patents
Vibration noise processing method and device, electronic equipment and storage medium Download PDFInfo
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Classifications
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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
Abstract
The embodiment of the application discloses a vibration noise processing method, a vibration noise processing 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 acquired by a sound acquisition device, and the sound acquisition device is arranged on the printed circuit board assembly; acquiring a cancellation signal with opposite phase to the vibration noise signal based on the vibration noise signal; and playing the offset signal. Through the method, the vibration noise signals and the counteracting signals are mutually counteracted, 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, a 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 cause interference to a user, so as to reduce user experience.
Disclosure of Invention
In view of the above, the present application proposes a vibration noise processing method, apparatus, electronic device, and storage medium to achieve 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 acquired by a sound acquisition device, and the sound acquisition device is arranged on the printed circuit board assembly; acquiring a cancellation signal with opposite phase to the vibration noise signal based on the vibration noise signal; and playing the offset signal.
In a second aspect, embodiments of the present application provide a vibration noise processing apparatus, which operates in an electronic device, the apparatus including: the device comprises a noise signal acquisition unit, a sound acquisition unit and a control unit, wherein the noise signal acquisition unit is used for acquiring a vibration noise signal, the vibration noise signal is a signal generated by a printed circuit board assembly acquired by the sound acquisition unit, and the sound acquisition unit 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 offset signal.
In a third aspect, an embodiment of the present application provides an electronic device, including a sound collection device, a sound playing 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 counteraction 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, embodiments of the present application provide a computer readable storage medium having program code stored therein, wherein the above-described method is performed when the program code is run.
The embodiment of the application provides a vibration noise processing method, a vibration noise processing device, electronic equipment and a storage medium. 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, based on the vibration noise signal, a cancellation signal with opposite phase to the vibration noise signal is obtained, and finally, the cancellation signal is played. Through the method, the vibration noise signals and the counteracting signals are mutually counteracted, 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 of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly introduced below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic diagram of 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 of vibration noise processing according to an embodiment of the present application;
FIG. 3 is a flow chart illustrating a method of vibration noise treatment according to another embodiment of the present application;
FIG. 4 shows a schematic representation of an acoustic response 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 method of vibration noise treatment according to yet another embodiment of the present application;
fig. 8 is a flowchart showing 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 method of vibration noise treatment according to yet another embodiment of the present application;
fig. 10 is a block diagram showing a construction of a vibration noise processing apparatus according to an embodiment of the present application;
fig. 11 is a block diagram showing a construction of a vibration noise processing apparatus according to an embodiment of the present application;
fig. 12 shows a block diagram of an electronic device for executing a vibration noise processing method according to an embodiment of the present application in real time;
fig. 13 shows 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 following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all, of the embodiments of the present application. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application.
With the advent and popularization of various intelligent electronic devices, headphones have become an important electronic device accessory in people's daily lives. But the noisy environment can greatly reduce the accuracy of people receiving sound information by using the earphone, especially for business people who often go on business and take aircrafts, office workers who squeeze subways and buses, and office workers in a central air-conditioning room. Therefore, the demand for noise reduction headphones has also grown rapidly.
The inventor finds that some printed circuit boards may be included in the electronic device, and some components in the printed circuit boards generate vibration noise due to vibration, and the generated vibration noise may cause interference to users and reduce user experience. When the bluetooth headset is connected to the electronic device through bluetooth, the bluetooth headset may send a radio frequency signal every 1.25ms, and when the radio frequency signal is sent, the bluetooth headset has a larger power, so that a power supply current may be drawn every 1.25ms, so that a battery power supply ripple period of the bluetooth headset is 1.25ms, that is, a frequency is 800Hz, thereby forming a ripple signal with 800Hz as a fundamental frequency, and further, on a battery related power supply line and a signal line interfered by the battery related power supply line, a ripple signal with 800Hz as a fundamental frequency may exist, so that a vibration noise may be generated by capacitance/inductance on the related line. The ripple is a phenomenon caused by voltage fluctuation of the dc stabilized power supply, because the dc stabilized power supply is generally formed by rectifying and stabilizing the ac power supply, and the like, which inevitably has some ac components in the dc stabilized amount, and the ac component superimposed on the dc stabilized amount is called the ripple.
In addition, a switching power supply circuit such as a DC-DC voltage conversion circuit is arranged on the circuit of the Bluetooth headset, and if the modulation frequency of the switching power supply circuit is within 20 Hz-20 KHz, inductance/capacitance vibration is caused to generate vibration noise. The related solution is that the capacitance in the Bluetooth earphone is changed into a noise-based capacitance, and the inductance is changed 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 way, the cost is increased, and the vibration noise cannot be completely eliminated.
Therefore, the inventor proposes the first vibration noise signal that obtains in this application, vibration noise signal is the signal that the printed circuit board subassembly that sound collection system gathered produced, wherein, sound collection system set up in on the printed circuit board subassembly, then based on vibration noise signal, obtain with vibration noise signal phase place reverse offset signal, play offset signal at last, let vibration noise signal offset each other with offset signal, can effectively eliminate the interference of vibration noise that the printed circuit board subassembly produced to the user, promote vibration noise processing method, device, electronic equipment and the storage medium of user experience.
The following describes an application environment of the vibration noise processing method provided by the implementation of the present invention:
referring to fig. 1, the vibration noise processing method provided by the embodiment 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 collecting device 110, an analog-to-digital converter 120, a digital signal processing (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 used 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, which may collect sound signals.
An analog-to-digital converter, or a/D converter, for short, an ADC, 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 themselves have no practical meaning, only one relative size is represented. Therefore, any analog-to-digital converter needs a reference analog quantity as a conversion standard, and the most common reference standard is the maximum convertible signal size. And the number of digits output indicates 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 transmitted 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 having a phase opposite to that of the vibration noise signal. In the embodiment of the present application, the 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 separate program and data, has special hardware multipliers, widely adopts pipeline operation, provides special DSP instructions, and can be used for rapidly realizing various digital signal processing algorithms. The digital signal processing is to collect, transform, filter, estimate, enhance, compress, identify the signal in digital form by computer or special processing equipment to obtain signal form meeting the needs of people.
The digital-to-analog converter 140 may be used to receive the cancellation signal transmitted by the digital signal processing chip 130 and convert the cancellation signal into an electrical signal. A digital-to-analog converter, also called D/a converter, DAC for short, is a device that converts digital quantities into analog. The D/a converter consists essentially of 4 parts, namely a weighted resistor network, an operational amplifier, a reference power supply and an analog switch.
The sound playing device 150 may be used to convert the electric signal sent by the digital-to-analog converter into an acoustic wave with a phase opposite to that of the vibration noise signal for playing. The sound playing device 150 may be a loudspeaker.
Embodiments of the present application will be described in detail below with reference to the accompanying drawings.
Referring to fig. 2, an embodiment of the present application provides a vibration noise processing method, which is applied to an electronic device, and 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 this embodiment of the present application, the sound collecting device may be a sensor such as a bone conduction microphone or a gravity sensor that may pick up a vibration signal.
Among them, bone conduction is a sound conduction mode, i.e., converting sound into mechanical vibration of different frequencies, and transmitting sound waves through skull, bone labyrinth, inner ear lymph, screw, auditory center of a person. Compared with the classical sound conduction mode of generating sound waves through a vibrating diaphragm, bone conduction omits a plurality of sound wave transmission steps, can realize clear sound restoration in a noisy environment, and the sound waves cannot influence others due to diffusion in the air. Bone conduction techniques are classified into bone conduction speaker techniques and bone conduction microphone techniques. In the embodiments of the present application, the bone conduction microphone may also be called as a bone conduction sensor, and the bone conduction microphone may collect signals generated by the printed circuit board assembly through bone conduction microphone technology.
As one way, the electronic device may comprise a first sound collection device and a second sound collection device, the first sound collection device may be arranged at any position of the printed circuit board assembly for collecting signals generated by vibrations of the printed circuit board assembly, i.e. PCBA (Printed Circuit Board Assembly ) vibration murmurs. Because PCBA vibration noise is an inherent background noise, when the first sound collection device is disposed at any location on the printed circuit assembly, it is possible to determine whether the signal is PCBA vibration noise by detecting a signal for a period of time, and if the signal for the period of time is a stable signal, it is determined that the signal is PCBA vibration noise. 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 a microphone) in the electronic equipment is used for collecting the voice of speaking of a user, the sound collecting device is used for collecting the external sound of the electronic equipment, the newly added sound collecting device arranged on the printed circuit board assembly is used for collecting the vibration noise signals generated when the 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 collecting device may also be disposed near a human ear that is not close to a human face or that is not capable of transmitting a voice of a human being, so as to prevent the voice of the human being from being transmitted through the human face, and to interfere with pickup of signals generated on the printed circuit board assembly.
Of course, the first sound collection device may also be positioned near the face or near the ear of a person transmitting the voice of the person speaking. If the first sound collecting device is arranged near the human face or the human ear capable of transmitting the speaking sound of the human, the vibration signal generated by the speaking is obviously smaller than the vibration signal generated by the vibration of the printed circuit board assembly, so that a signal threshold value can be preset, and whether the current signal is the PCBA vibration noise signal generated by the printed circuit board assembly or not can be detected in real time. When detecting whether the current signal is a PCBA vibration noise signal generated by the vibration of the printed circuit board assembly, whether the current signal is the PCBA vibration noise signal generated by the vibration of the printed circuit board assembly can be determined according to the signal intensity of the current signal and the size of a signal threshold, and whether the current signal is collected by the first sound collecting device or the second sound collecting device can be determined, wherein the signal threshold can be a signal intensity value representing that the signal is the PCBA vibration noise signal generated by the vibration of the printed circuit board assembly. Specifically, when the signal intensity of the current signal is smaller than the signal threshold value, determining that the current signal is not PCBA vibration noise generated by the vibration of the printed circuit board assembly, and acquiring the current signal through a second sound acquisition device; when the signal intensity of the current signal is larger than or equal to the signal threshold value, the current signal is determined to be PCBA vibration noise generated by the vibration of the printed circuit board assembly, and then the current signal is collected through the first sound collection device.
When the signal generated by the printed circuit board assembly is collected by the sound collection device arranged on the printed circuit board assembly, the sound collection device can periodically or real-timely collect the signal generated by the printed circuit board assembly, and can start to collect the signal only when the signal generated by the printed circuit board assembly is detected. When the signal is detected to be generated on the printed circuit board assembly, the sound collecting device starts to collect the vibration signal, corresponding signal identifiers can be set for signals generated by different assemblies of the electronic equipment in advance respectively, and then the signal generated by which assembly can be determined through the detected signal identifiers. Specifically, the mark of the signal generated on the printed circuit board assembly can be set as "Y", and when the signal detection device detects the signal with the mark of "Y", the signal can be determined to be generated by the printed circuit board assembly, and then the signal detection device can send a trigger signal to the sound collection device so as to trigger the sound collection device to start to collect the signal generated on the printed circuit board assembly. Of course, the signal identifier may be a custom character or a character string in a specific format, which is not specifically limited herein.
Of course, the electronic device can acquire the vibration noise signal acquired by the sound acquisition device in real time, and can convert the signal into an analog electric signal when the signal generated by the printed circuit board assembly is acquired by the sound acquisition device, and then can send the analog electric signal to the analog-to-digital converter for signal conversion.
Step S120: based on the vibration noise signal, a cancellation signal having a phase opposite to that of the vibration noise signal is obtained.
Since sound propagates through a medium such as air in the form of waves, and the vibration has a certain direction and amplitude, in the embodiment of the application, after the vibration noise signal is obtained by the method, a cancellation signal opposite to the vibration direction of the vibration noise signal can be obtained by digital signal processing by using the ANC (Active Noise Cancellation) technology principle. The principle of the active noise reduction technology is that all sounds consist 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 out only by just opposite phases (180 degrees different). There are generally two methods for earphone noise reduction, active noise reduction and passive noise reduction. Active noise reduction is a noise reduction technology, and is one of methods applied to noise reduction of headphones. The active noise reduction function is to generate reverse sound waves equal to external noise through the noise reduction system and neutralize the noise, so that the noise reduction effect is realized.
As one way, a next vibration noise signal to be generated on the printed circuit board assembly may be predicted within a target period of time based on the currently acquired vibration noise signal, and a cancellation signal having a direction opposite to the predicted vibration direction of the next vibration noise signal may be generated.
The preset time period can be set based on the smoothness time period of the vibration noise signal generated by the printed circuit board assembly under the influence of the ripple signal with the same frequency. That is, the vibration noise signal does not change rapidly in a period of time under the action of the ripple signal with the same frequency, so if the next vibration noise signal to be generated can be predicted in the period of time, the cancellation signal with opposite vibration directions can be generated in advance according to the next vibration noise signal, and cancellation can be completed before the next vibration noise signal reaches the human ear. By way of 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, the cancellation signal with opposite phase can be generated in advance accordingly, so that the effect of completely eliminating the vibration noise signal is achieved. That is, the embodiment of the application adopts a prejudging mechanism to prejudge the noise to be generated in the future, and generates the cancellation signal with opposite phase of the future noise signal in advance, so that cancellation is completed before the next wave noise reaches the human ear.
The prediction of the next-stage vibration noise signal to be generated by the printed circuit board assembly may be performed based on a deep learning technique, or a model such as a gaussian mixture model (Gaussian Mixture Models, GMM), a Hidden markov model (Hidden MarkovModel, HMM), a principal component analysis (PCA, principal Components Analysis) may be adopted, which is not particularly limited in the embodiment of the present application.
Step S130: and playing the offset signal.
After the cancellation signal with the opposite vibration direction to the vibration noise signal is obtained by the method, the cancellation signal is played through a loudspeaker (also called a loudspeaker) of the electronic equipment, so that the vibration noise is eliminated, and the vibration noise is not perceived at the human ear.
The application provides a vibration noise processing method, at first acquire vibration noise signal, vibration noise signal is the signal that the printed circuit board subassembly that sound collection system gathered produced, wherein, sound collection system set up in on the printed circuit board subassembly, then based on vibration noise signal, acquire with vibration noise signal opposite phase offset signal, play offset signal at last. Through the method, the vibration noise signals and the counteracting signals are mutually counteracted, 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, step S210 may be specifically explained with reference to the above embodiments, and thus is not described herein.
Step S220: and acquiring a preset transfer function.
As one way, 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 represents a signal function of the change condition of the corresponding signal parameter when the vibration noise signal propagates from the generation place to the appointed position; the second function represents a signal function of the change condition of the corresponding signal parameter when the vibration noise signal propagates from the generation place to the sound collecting device; the third function characterizes a transfer function of the change condition of the corresponding signal parameter when the vibration noise signal propagates from the playing position to the appointed 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, which may be obtained through laboratory tuning in a product development stage; the generating place is a printed circuit board assembly; the designated position is an artificial ear, wherein the artificial ear is a tool special for measuring acoustic performance of a headset, a receiver and a telephone receiver; the sound collection device is a sensor; the playing position is a loudspeaker. As shown in the acoustic response diagram of fig. 4, in fig. 4, N is PCBA vibration noise; FM is a sensor; the ADC is an analog-to-digital converter; the DSP is a digital signal processing chip; DAC is a digital-to-analog converter; s is a spaker (loudspeaker); e is an artificial ear microphone; N2E is a first function, and represents a signal function of the change condition of a corresponding PCBA vibration signal when PCBA vibration noise is transmitted to an artificial ear from a printed circuit board assembly; n2FM is a second function, and represents a signal function of the change condition of the corresponding PCBA vibration signal when PCBA vibration noise is transmitted to the sensor from the printed circuit board assembly; S2E is a third function, and represents a transfer function of the change condition of corresponding PCBA vibration noise when PCBA vibration signals are transferred from the loudspeaker to the artificial ear; f is an ANC transfer function in the digital signal processing chip.
N2E and N2FM are signal functions which can be obtained through actual measurement; S2E can be calculated and obtained through the played sweep frequency signal. The preset transfer function can be obtained by the following calculation formula: n2e= -N2FM x S2E x F, i.e.:
for example, when the earphone is worn on an artificial ear, where N is 80dB loudness pink noise with a frequency of 20 Hz-20 KHz, FM may be picked up by the microphone, E may be picked up by the microphone of the artificial ear, as shown in fig. 5, where L1 in fig. 5 represents the FM frequency response, and L2 represents the E frequency response. Among them, pink noise is a physical concept that has equal intensity in each of the multiple wavelengths, i.e., has the same or similar energy in a certain range (multiple wavelength).
It is possible to obtain: n2e=e/N, n2fm=fm/N; thus, N2E/n2fm=e/FM.
S2E can be calculated by the following steps: the earphone plays a sweep frequency signal (denoted by A) with the loudness of 0dB of fixed 20 Hz-20 KHz, namely the signal with the loudness of fixed size (0 dB) and the frequency of 20 Hz-20 KHz.
When the earphone is worn to the artificial ear, the measurable frequency response curve B is as shown in fig. 6, and thus s2e=b/a can be obtained; both B and A are known.
Of course, as just shown, in practical application, the PCBA vibration noise is diversified, and the vibration noise may be a certain signal segment or a certain signal segment, although the noise signals are various, the method of the example is consistent, and the transfer function is independent of the signals.
Step S230: and processing the vibration noise signal based on the preset transfer function to obtain a cancellation signal with opposite phase to the vibration noise signal.
In the embodiment of the application, in order to eliminate the PCBA vibration noise, after the preset transfer function is obtained by the above method, the cancellation signal opposite to the vibration noise signal phase can be obtained by calculating the preset transfer function.
Step S240: and playing the offset signal.
In the embodiment of the present application, step S240 may be specifically explained with reference to the above embodiments, and thus is not described herein.
According to the vibration noise processing method, firstly, vibration noise signals are acquired, the vibration noise signals are signals 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 preset transfer function is acquired, the vibration noise signals are processed based on the preset transfer function, offset signals opposite to the vibration noise signals in phase are obtained, and finally the offset signals are played. According to the method, the vibration noise signals are collected through the sound collecting device arranged on the printed circuit board assembly, then the offset signals with opposite phases to the vibration noise signals are calculated according to the preset transfer function, the offset signals are played, the vibration noise signals and the offset signals are mutually overlapped and offset, interference of the vibration noise to a user can be effectively eliminated, noise cannot be perceived at the human ear, and user experience is improved.
Referring to fig. 7, a vibration noise processing method provided in an 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, step S310 may be specifically explained in detail in the above embodiment, so it is not described herein.
Step S320: based on the vibration noise signal, a cancellation signal having an equal amplitude and an opposite phase to the vibration noise signal is obtained.
To completely eliminate PCBA noise signals generated by printed circuit board assembly vibrations, a cancellation signal of equal and opposite amplitude to the PCBA noise signals may be generated in the following manner.
As shown in fig. 8, the specific steps of step S320 may include:
step S321: the vibration noise signal is converted into a digital signal by the analog-to-digital converter.
Step S322: and carrying out digital processing on the digital signals through the digital signal processing chip to obtain counteracting signals in the form of digital signals.
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 with the same amplitude and opposite phase to the vibration noise signal.
Specifically, after the vibration noise signal generated by the vibration of the printed circuit board assembly is collected through the first sound collection device, the collected vibration noise signal can be sent to the analog-to-digital converter through the first sound collection device, and then the analog-to-digital converter can convert the vibration noise signal into a digital signal and send the digital signal to the digital signal processing chip.
The digital signal processing chip is used for obtaining a cancellation signal in the form of a digital signal with the same amplitude and opposite phase with the vibration noise signal through calculation of the prestored preset transfer function after receiving the digital signal sent by the analog-to-digital converter.
After the digital signal processing chip processes the cancellation information in the form of a digital signal with the same amplitude and opposite phase to the vibration noise signal, the digital signal processing chip can send the cancellation signal in the form of the digital signal to the digital-to-analog converter, and then the digital-to-analog converter can convert the cancellation signal in the form of the digital signal into an analog signal to obtain the cancellation signal finally played by the loudspeaker.
Step S330: and playing the offset signal.
In the embodiment of the present application, step S330 may be specifically explained with reference to the above embodiments, and thus is not described herein.
The application provides a vibration noise processing method, at first acquire vibration noise signal, vibration noise signal is the signal that the printed circuit board subassembly that sound collection system gathered produced, wherein, sound collection system sets up on the printed circuit board subassembly, then based on this vibration noise signal, acquires and equal and the opposite offset signal of phase place with vibration noise signal amplitude, plays this offset signal at last. Through the method, the vibration noise signals and the counteracting signals are mutually overlapped and counteracted, 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. 9, a vibration noise processing method provided in an 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 having a phase opposite to that of the vibration noise signal is obtained.
In the embodiment of the present application, the step S410 and the step S420 may be specifically explained with reference to the above embodiments, and thus are not described herein.
Step S430: if the audio signal to be played is detected.
In this embodiment of the present application, the audio signal to be played may be an audio signal stored in advance in an intelligent device that establishes a bluetooth connection with an earphone, or may be a voice signal of a person speaking that is collected by a second voice collection device in real time.
The intelligent device can be a smart phone or a music player. And thus it can be determined whether an audio signal to be played is detected by whether a specific operation of the smart phone or the music player by the user is detected. Specifically, when detecting that a user triggers music playing or an audio playing program in the intelligent 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 the user clicks the play button.
Of course, in the embodiment of the present application, the time when the audio signal to be played is played may also be preset, so that the current time may be detected in real time, and whether the current time is the time when the audio signal to be played is detected to determine whether the audio signal to be played is detected. Specifically, if the current moment is the playing time of the audio signal to be played, determining that the audio signal to be played is detected; otherwise, it is determined that no audio signal to be played is detected.
Step S440: and carrying out confluence operation on the audio signal to be played and the offset signal to obtain a target audio signal.
After the audio signal to be played is determined to be detected in the above manner, the audio signal to be played and the offset signal generated by the method can be subjected to merging operation, so that the audio signal to be played is obtained.
For example, if the detected audio signal to be played is the signal a, the generated cancellation signal with the opposite phase to the vibration noise signal is the signal B, and the signal a and the signal B are combined to form one signal, that is, the target audio signal. By the method, the interference of vibration noise generated by the printed circuit board assembly on the played audio can be reduced.
Step S450: playing the target audio signal.
After the target audio signal is obtained through the method, the target audio signal is played through a loudspeaker.
According to the vibration noise processing method, firstly, vibration noise signals are obtained, the vibration noise signals are signals 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, cancellation signals with opposite phases to the vibration noise signals are obtained based on the vibration noise signals, if audio signals to be played are detected, the audio signals to be played and the cancellation signals are combined, a target audio signal is obtained, and the target audio signal is played. By the method, the interference of noise signals carried in the audio signals to be played to the user can be effectively eliminated, and the user experience is improved.
Referring to fig. 10, an apparatus 500 for processing vibration noise according to an embodiment of the present application is operated in an electronic device, where the apparatus 500 includes:
the noise signal obtaining unit 510 is configured to obtain a vibration noise signal, where the vibration noise signal is a signal generated by a printed circuit board assembly collected by the sound collecting device, and the sound collecting device is disposed on the printed circuit board assembly.
And a cancellation signal acquisition unit 520 configured to acquire a cancellation signal having a phase opposite to that of the vibration noise signal based on the vibration noise signal.
As one way, the cancellation signal acquisition unit 520 is configured to acquire a preset transfer function; and processing the vibration noise signal based on the preset transfer function to obtain a cancellation signal with opposite phase to the vibration noise signal.
The step of acquiring the preset transfer function comprises the following steps: obtaining the preset transfer function based on the first function, the second function and the third function; the first function represents a signal function of the change condition of the corresponding signal parameter when the vibration noise signal propagates from the generation place to the appointed position; the second function represents a signal function of the change condition of the corresponding signal parameter when the vibration noise signal propagates from the generation place to the sound collecting device; the third function characterizes a transfer function of the change condition of the corresponding signal parameter when the vibration noise signal propagates from the playing position to the appointed position.
As another way, the cancellation signal acquisition unit 520 is configured to acquire a cancellation signal having an equal amplitude and an opposite phase to the vibration noise signal based on the vibration noise signal.
Specifically, the cancellation signal acquisition unit 520 is configured to convert the vibration noise signal into a digital signal through the analog-to-digital converter; performing 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 with the same amplitude and opposite phase to the vibration noise signal.
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; playing the target audio signal.
It should be noted that, in the present application, the device embodiment and the foregoing method embodiment correspond to each other, and specific principles in the device embodiment may refer to the content in the foregoing method embodiment, which is not described herein again.
An electronic device provided in the present application will be described 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 executing the above-mentioned vibration noise processing method is further provided in the embodiments of the present application. The electronic device 800 comprises a sound collection device 110, a sound playback device 150, one or more (only one shown in the figure) processors 802 coupled to each other, a memory 804, and a network module 806. The memory 804 stores therein a program capable of executing the contents of the foregoing embodiments, and the processor 802 can execute the program stored in the memory 804.
The sound collection device 110 is used for collecting vibration noise signals, and in this embodiment of the present application, the sound collection device 110 may be a device that may collect sound signals, such as a microphone, a sensor, and the like.
The sound playing device 150 may be used to convert the electric signal sent by the digital-to-analog converter into an acoustic wave with a phase opposite to that of the vibration noise signal for playing. The sound playing device 150 may be a loudspeaker.
The processor 802 may include one or more processing cores. The processor 802 utilizes various interfaces and lines to connect various portions of the overall electronic device 800, 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 in at least one of digital signal processing (Digital Signal Processing, DSP), field programmable gate array (Field-Programmable Gate Array, FPGA), programmable logic array (Programmable Logic Array, PLA). The processor 802 may integrate one or a combination of several of a central processing unit (Central Processing Unit, CPU), an image processor (Graphics Processing Unit, GPU), and a modem, etc. The CPU mainly processes an operating system, a user interface, an application program and the like; the GPU is used for being responsible for rendering and drawing of display content; the modem is used to handle wireless communications. It will be appreciated that the modem may not be integrated into the processor 802 and may be implemented solely by a single communication chip.
The Memory 804 may include a random access Memory (Random Access Memory, RAM) or a Read-Only Memory (ROM). Memory 804 may be used to store instructions, programs, code, sets of codes, or instruction sets. The memory 804 may include a stored program area that may store instructions for implementing an operating system, instructions for implementing at least one function (e.g., a touch function, a sound playing function, an image playing function, etc.), instructions for implementing the various method embodiments described below, etc., and a stored data area. The storage data area may also store data created by the terminal 800 in use (e.g., phonebook, audio-video data, chat-record data), etc.
The network module 806 is configured to receive and transmit electromagnetic waves, and to implement mutual conversion between electromagnetic waves and electrical signals, so as to communicate with a communication network or other devices, such as an audio playback 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 the like. The network module 806 may communicate with various networks such as the internet, intranets, wireless networks, or with other devices via wireless networks. The wireless network may include a cellular telephone network, a wireless local area network, or a metropolitan area network. For example, the network module 806 may interact with base stations.
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 which can be invoked by a processor to perform the methods described in the method embodiments described above.
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. Optionally, computer readable storage medium 900 includes non-volatile computer readable media (non-transitory computer-readable storage medium). The computer readable storage medium 900 has storage space for program code 910 that performs any of the method steps described above. The program code can be read from or written to one or more computer program products. 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 vibration noise signal, vibration noise signal is the signal that the printed circuit board subassembly that sound collection system gathered produced, wherein, sound collection system set up in on the printed circuit board subassembly, then based on vibration noise signal, acquire with vibration noise signal opposite offset signal of phase place, play offset signal at last. Through the method, the vibration noise signals and the counteracting signals are mutually overlapped and counteracted, 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.
The embodiments of the present invention have been described above with reference to the accompanying drawings, but the present invention is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and many forms may be made by those having ordinary skill in the art without departing from the spirit of the present invention and the scope of the claims, which are to be protected by the present invention.
Claims (10)
1. A vibration noise processing method, characterized by being applied to an electronic device, comprising:
the method comprises the steps that vibration noise signals are obtained, the vibration noise signals are signals generated by a printed circuit board assembly and collected by a sound collection device, wherein the sound collection device is arranged on the printed circuit board assembly, the sound collection device is a sound collection device newly added in the electronic equipment and is arranged near a human ear which is close to a human face or can transmit human speaking sound, the electronic equipment comprises a first sound collection device and a second sound collection device, the sound collection device is the first sound collection device, the second sound collection device is an original sound collection device of the electronic equipment, when the signal intensity of a current signal is smaller than a signal threshold value, it is determined that the current signal is not PCBA vibration noise generated by vibration of the printed circuit board assembly, and the current signal is collected through the second sound collection device; when the signal intensity of the current signal is larger than or equal to a signal threshold value, determining that the current signal is PCBA vibration noise generated by the vibration of the printed circuit board assembly, and collecting the current signal through the first sound collecting device;
Acquiring a cancellation signal with opposite phase to the vibration noise signal based on the vibration noise signal;
and playing the offset signal.
2. The method of claim 1, wherein the obtaining a cancellation signal based on the vibration noise signal that is opposite in phase to 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 opposite phase to 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 represents a signal function of the change condition of the corresponding signal parameter when the vibration noise signal propagates from the generation place to the appointed position;
the second function represents a signal function of the change condition of the corresponding signal parameter when the vibration noise signal propagates from the generation place to the sound collecting device;
the third function characterizes a transfer function of the change condition of the corresponding signal parameter when the vibration noise signal propagates from the playing position to the appointed position.
4. The method of claim 1, wherein the obtaining a cancellation signal based on the vibration noise signal that is opposite in phase to the vibration noise signal comprises:
based on the vibration noise signal, a cancellation signal having an equal amplitude and an opposite phase to the vibration noise signal is obtained.
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, wherein the obtaining a cancellation signal equal in magnitude and opposite in phase to the vibration noise signal based on the vibration noise signal comprises:
converting the vibration noise signal into a digital signal by the analog-to-digital converter;
performing 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 with the same amplitude and opposite phase to the vibration noise signal.
6. The method according to claim 1, wherein the method further comprises:
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;
playing the target audio signal.
7. The method of any one of claims 1-6, wherein the sound collection device is a bone conduction microphone or a gravity sensor.
8. A vibration noise processing apparatus operable in an electronic device, the apparatus comprising:
the electronic equipment comprises a first sound acquisition device and a second sound acquisition device, wherein the first sound acquisition device is used for acquiring a sound signal, the second sound acquisition device is used for acquiring an original sound acquisition device of the electronic equipment, when the signal intensity of the current signal is smaller than a signal threshold value, it is determined that the current signal is not PCBA vibration noise generated by vibration of the printed circuit board assembly, and the current signal is acquired through the second sound acquisition device; when the signal intensity of the current signal is larger than or equal to a signal threshold value, determining that the current signal is PCBA vibration noise generated by the vibration of the printed circuit board assembly, and collecting the current signal through the first sound collecting device;
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 offset signal.
9. An electronic device, comprising a sound collection device, a sound playing 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 counteraction 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, characterized in that the computer readable storage medium has stored therein a program code, wherein the program code, when being executed by a processor, performs the method of any of claims 1-8.
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