Method and device for determining contribution degree of transmission path of excitation source, equipment and medium

Abstract

The invention provides a method, device, equipment and medium for determining the contribution degree of a transmission path of an excitation source, and the method comprises the steps: collecting white noise emitted by a volume sound source through a first microphone to obtain a first noise spectrum, and collecting white noise emitted by the volume sound source through a second microphone to obtain a second noise spectrum; determining a noise attenuation spectrum according to the first noise spectrum and the second noise spectrum; the working noise of the excitation source is collected through the first microphone and the second microphone, and third noise data and fourth noise data are obtained respectively; respectively processing the third noise data and the fourth noise data to obtain a corresponding third noise spectrum and a fourth noise spectrum; according to the fourth noise spectrum and the noise attenuation spectrum, determining a fifth noise spectrum transmitted to the ear of the user by the excitation source through air; and determining the contribution degree of the air transmission path according to the third noise spectrum and the fifth noise spectrum. The method aims to quantify the contribution degree of an air transmission path of excitation source working noise.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle corner control, and in particular to a method, device, equipment and medium for determining a contribution of a transmission path of an excitation source. Background Art

[0002] There are two types of transmission paths for excitation sources. One is that the vibration of the excitation source is transmitted through the structure to generate noise, and the other is that the radiation noise of the excitation source is transmitted through the air. When troubleshooting the cause of NVH (Noise, Vibration, Harshness) problems, it is usually verified by disconnecting the installation point of the excitation source or wrapping the excitation source with sound insulation materials to determine which transmission path accounts for the main contribution. The above method can only determine which path is the main contribution, and cannot quantify the contribution of the noise transmission path of the excitation source. Summary of the invention

[0003] In view of this, the present invention provides a method, device, equipment, and medium for determining the contribution of the excitation source transfer path, aiming to quantify the contribution of the air transfer path of the excitation source working noise.

[0004] A first aspect of an embodiment of the present invention provides a method for determining a contribution of an excitation source transfer path, the method comprising:

[0005] Collecting white noise emitted by a volume sound source through a first microphone to obtain first noise data, and collecting white noise emitted by a volume sound source through a second microphone to obtain second noise data, wherein the first microphone is arranged near an ear of a user, and the volume sound source and the second microphone are arranged at a location where an excitation source is located;

[0006] Obtaining a first noise spectrum by processing the first noise data, and obtaining a second noise spectrum by processing the second noise data;

[0007] determining a noise attenuation spectrum according to the first noise spectrum and the second noise spectrum;

[0008] collecting the working noise of the excitation source through the first microphone to obtain third noise data, and collecting the working noise of the excitation source through the second microphone to obtain fourth noise data;

[0009] obtaining a third noise spectrum by processing the third noise data, and obtaining a fourth noise spectrum by processing the fourth noise data;

[0010] Determine, according to the fourth noise spectrum and the noise attenuation spectrum, a fifth noise spectrum of the working noise of the excitation source transmitted to the ear of the user through the air;

[0011] An air transfer path contribution of the excitation source is determined according to the third noise spectrum and the fifth noise spectrum.

[0012] Optionally, the obtaining a third noise spectrum by processing the third noise data, and the obtaining a fourth noise spectrum by processing the fourth noise data, comprises:

[0013] Obtaining a first order analysis result by performing waterfall diagram processing and order analysis on the third noise data;

[0014] Determining the problem frequency of the excitation source according to the first order analysis result;

[0015] Determine, according to the problem frequency, a third noise spectrum at the problem frequency in the first order analysis result;

[0016] Obtaining a second order analysis result by performing waterfall diagram processing and order analysis on the fourth noise data;

[0017] According to the determined problematic frequency of the excitation source, a fourth noise spectrum at the problematic frequency in the second order analysis result is determined.

[0018] Optionally, determining the problem frequency of the excitation source according to the first-order analysis result includes:

[0019] Determine the noise energy corresponding to each frequency in the first order analysis result;

[0020] Comparing the noise energy corresponding to each of the frequencies with a set threshold to obtain a comparison result;

[0021] When the comparison result indicates that the noise energy corresponding to each frequency exceeds the set threshold, the frequency corresponding to the maximum noise energy among the noise energies exceeding the set threshold is determined as the problem frequency.

[0022] Optionally, determining the air transfer path contribution of the excitation source according to the third noise spectrum and the fifth noise spectrum includes:

[0023] Determining a measured sound pressure level at a problem frequency according to the third noise spectrum, and determining a theoretical sound pressure level at the problem frequency according to the fourth noise spectrum;

[0024] The air transfer path contribution of the excitation source is determined according to the measured sound pressure level and the theoretical sound pressure level.

[0025] Optionally, determining the air transfer path contribution of the excitation source according to the measured sound pressure level and the theoretical sound pressure level includes:

[0026] Obtaining a first target value by subtracting the measured sound pressure level from the theoretical sound pressure level;

[0027] Comparing the first target value with each preset value range to determine the preset value range in which the first target value is located, wherein each preset value range corresponds to each contribution degree;

[0028] The preset value range within which the first target value is located is determined as the target value range, and the contribution corresponding to the target value range is determined as the air transfer path contribution of the excitation source at the problem frequency.

[0029] Optionally, determining the air transfer path contribution of the excitation source according to the measured sound pressure level and the theoretical sound pressure level includes:

[0030] Determining a measured noise energy according to the measured sound pressure level, and determining a theoretical noise energy according to the theoretical sound pressure level;

[0031] The theoretical noise energy is divided by the measured noise energy to obtain a second target value, and the second target value is determined as the air transfer path contribution of the excitation source at the problem frequency.

[0032] Optionally, obtaining a first noise spectrum by processing the first noise data, and obtaining a second noise spectrum by processing the second noise data includes:

[0033] Obtaining a first spectrum by performing time-frequency domain conversion processing on the first noise data;

[0034] determining the first noise spectrum according to the first frequency spectrum and the conjugate of the first frequency spectrum;

[0035] Obtaining a second spectrum by performing time-frequency domain conversion processing on the second noise data;

[0036] The second noise spectrum is determined according to the second frequency spectrum and a conjugate of the second frequency spectrum.

[0037] A second aspect of an embodiment of the present invention provides a device for determining a contribution of an excitation source transfer path, the device comprising:

[0038] The first noise data acquisition module is used to collect white noise emitted by a volume sound source through a first microphone to obtain first noise data, and to collect white noise emitted by the volume sound source through a second microphone to obtain second noise data, wherein the first microphone is arranged near the ear of the user, and the volume sound source and the second microphone are arranged at the location of the excitation source;

[0039] A first noise data processing module, configured to obtain a first noise spectrum by processing the first noise data, and to obtain a second noise spectrum by processing the second noise data;

[0040] a noise attenuation spectrum determining module, configured to determine a noise attenuation spectrum according to the first noise spectrum and the second noise spectrum;

[0041] A second noise data acquisition module is used to collect the working noise of the excitation source through the first microphone to obtain third noise data, and to collect the working noise of the excitation source through the second microphone to obtain fourth noise data;

[0042] A second noise data processing module, configured to obtain a third noise spectrum by processing the third noise data, and to obtain a fourth noise spectrum by processing the fourth noise data;

[0043] A noise spectrum determination module, configured to determine a fifth noise spectrum of the working noise of the excitation source transmitted to the ear of the user through the air according to the fourth noise spectrum and the noise attenuation spectrum;

[0044] A contribution determination module is used to determine the air transfer path contribution of the excitation source according to the third noise spectrum and the fifth noise spectrum.

[0045] A third aspect of an embodiment of the present invention provides an electronic device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the computer program is executed by the processor, the method for determining the contribution of an excitation source transfer path as described in the first aspect of the present invention is implemented.

[0046] A fourth aspect of an embodiment of the present invention provides a computer-readable storage medium having a computer program stored thereon. When the computer program is executed by a processor, the method for determining a contribution of a transfer path of an excitation source as described in the first aspect of the present invention is implemented.

[0047] Compared with the prior art, the present invention has the following advantages:

[0048] The present invention provides a method for determining the contribution of an excitation source transfer path. The method firstly collects white noise emitted by a volume sound source arranged at a location of the excitation source through a first microphone arranged near an ear of a user to obtain first noise data, and collects white noise emitted by the volume sound source through a second microphone arranged at the location of the excitation source to obtain second noise data, obtains a first noise spectrum by processing the first noise data, and obtains a second noise spectrum by processing the second noise data; determines a noise attenuation spectrum according to the first noise spectrum and the second noise spectrum; collects working noise of the excitation source through the first microphone to obtain third noise data, and collects working noise of the excitation source through the second microphone to obtain fourth noise data; obtains a third noise spectrum by processing the third noise data, and obtains a fourth noise spectrum by processing the fourth noise data; determines a fifth noise spectrum of the working noise of the excitation source transmitted to the user's ear through the air according to the fourth noise spectrum and the noise attenuation spectrum; and determines the air transfer path contribution of the excitation source at the problem frequency according to the third noise spectrum and the fifth noise spectrum. Therefore, by testing the noise attenuation of the excitation source (that is, the above-mentioned noise attenuation spectrum), the near-field noise when the excitation source is working (that is, the above-mentioned fourth noise spectrum), and the noise near the user's ear (that is, the above-mentioned third noise spectrum), the theoretical calculation result of the noise near the user's ear (that is, the above-mentioned fifth noise spectrum) is obtained by theoretical calculation, and the theoretical calculation result of the noise near the user's ear is compared with the actual test result (that is, the above-mentioned third noise spectrum). According to the energy contribution method, the contribution of the noise emitted by the excitation source when it is working to be transmitted through the air transfer path is determined, so that the contribution of the air transfer path to the working noise of the excitation source can be quantified.

[0049] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, it can be implemented according to the contents of the specification. In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art are briefly introduced below.

[0051] Figure 1 A flow chart of a method for determining a contribution of an excitation source transfer path provided by an embodiment of the present invention;

[0052] Figure 2 A schematic diagram of a device for determining a contribution of an excitation source transfer path provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0053] Exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings.

[0054] Figure 1 A flow chart of a method for determining the contribution of an excitation source transfer path provided by an embodiment of the present invention, such as Figure 1 As shown, the method includes:

[0055] Step S1: collecting white noise emitted by a volume sound source through a first microphone to obtain first noise data, and collecting white noise emitted by a volume sound source through a second microphone to obtain second noise data, wherein the first microphone is arranged near an ear of a user, and the volume sound source and the second microphone are arranged at the location of an excitation source.

[0056] Step S2: obtaining a first noise spectrum by processing the first noise data, and obtaining a second noise spectrum by processing the second noise data.

[0057] Step S3: determining a noise attenuation spectrum according to the first noise spectrum and the second noise spectrum.

[0058] Step S4: collecting the working noise of the excitation source through the first microphone to obtain third noise data, and collecting the working noise of the excitation source through the second microphone to obtain fourth noise data.

[0059] Step S5: obtaining a third noise spectrum by processing the third noise data, and obtaining a fourth noise spectrum by processing the fourth noise data.

[0060] Step S6: determining a fifth noise spectrum of the working noise of the excitation source transmitted to the ear of the user through the air according to the fourth noise spectrum and the noise attenuation spectrum.

[0061] Step S7: determining the air transfer path contribution of the excitation source according to the third noise spectrum and the fifth noise spectrum.

[0062] In this embodiment, the excitation source refers to a component that generates noise during operation, which may be any component of a vehicle or any component of other machinery or objects, and is not specifically limited here. A medium-high frequency volume sound source is arranged at the location of the excitation source to generate noise at the location of the excitation source, and a microphone unit (that is, a second microphone) is arranged at the location of the excitation source to receive noise at the location of the excitation source; a microphone unit (that is, a first microphone) is arranged at the user's ear to receive noise at the user's ear, wherein, when the excitation source is a component of a vehicle, the user's ear is preferably the driver's ear, and it should be understood that this is only a preferred embodiment, and the user's ear may also be the ear of the person in the co-pilot seat or the ear of the passenger in the rear passenger seat, and is not specifically limited here. In step S1, firstly, a medium-high frequency volume sound source works to generate noise, and at this time, the excitation source does not work. Then, the white noise emitted by the medium-high frequency volume sound source is collected by the first microphone near the user's ear, thereby obtaining the corresponding first noise data. At the same time, the white noise emitted by the medium-high frequency volume sound source is collected by the second microphone at the location of the excitation source, thereby obtaining the corresponding second noise data. In step S2, the first noise data is processed to obtain the corresponding first noise spectrum, and at the same time, the second noise data is processed to obtain the corresponding second noise spectrum. Among them, each noise spectrum mentioned in the present invention can be a frequency spectrum, or an auto-rate spectrum, a linear auto-power spectrum, etc., preferably a linear auto-power spectrum, and each noise spectrum includes a first noise spectrum, a second noise spectrum, a third noise spectrum, a fourth noise spectrum, a fifth noise spectrum, and a noise attenuation spectrum. Among them, each noise data mentioned in the present invention includes time domain data represented in the time domain, or frequency domain data represented in the frequency domain.

[0063] It is also clearly stated later that in addition to using the linear autopower spectrum to calculate the air transfer path contribution, the frequency spectrum can also be used to calculate the air transfer path contribution.

[0064] In this embodiment, after the first noise spectrum and the second noise spectrum are obtained through step S2, step S3 is executed. Based on the obtained first noise spectrum and the second noise spectrum, the attenuation of the noise generated by the position of the excitation source and transmitted to the user's ear is obtained by calculation, that is, the noise attenuation spectrum of the noise generated by the position of the excitation source and transmitted to the user's ear.

[0065] In this embodiment, step S4 is executed. At this time, the mid-to-high frequency volume sound source does not work, but the excitation source works to generate the working noise of the excitation source. Then, the working noise generated by the excitation source is collected near the ear of the user through the first microphone to obtain the corresponding third noise data. At the same time, the working noise generated by the excitation source is collected at the location of the excitation source through the second microphone to obtain the corresponding fourth noise data.

[0066] In this embodiment, after the third noise data and the fourth noise data are obtained, the third noise data and the fourth noise data are processed respectively to obtain a third noise spectrum corresponding to the third noise data and a fourth noise spectrum corresponding to the fourth noise data.

[0067] In this embodiment, after the above steps S1 to S5 are executed to obtain the first noise spectrum, the second noise spectrum, the third noise spectrum and the fourth noise spectrum, step S6 is executed. According to the noise attenuation spectrum and the fourth noise spectrum respectively obtained in the above steps S3 and S5, the theoretical noise generated by the working noise when the excitation source is working and transmitted to the user's ear through the air transmission path is obtained by calculation, that is, the fifth noise spectrum.

[0068] In this embodiment, after obtaining the third noise spectrum and the fifth noise spectrum, the third noise spectrum is the result obtained by processing the measured noise of the working noise generated by the excitation source when it is working and transmitted to the user's ear, and the fifth noise spectrum is the theoretical noise spectrum of the working noise generated by the excitation source when it is working and transmitted to the user's ear through the air, and the third noise spectrum and the fifth noise spectrum are calculated to obtain the contribution of the excitation source to the noise transmitted through the air transmission path, that is, the proportion of the working noise generated by the excitation source when it is working and transmitted to the user's ear through the air transmission path to the noise transmitted to the user's ear through all transmission paths. Thus, it is convenient for the user to more accurately locate the NVH problem of the excitation source, so as to carry out targeted analysis and processing for the located NVH problem. For example, when the method for determining the contribution of the excitation source transmission path provided by the present invention determines that the contribution of the working noise of the excitation source when it is working and transmitted through the air transmission path is 80%, it indicates that the working noise of the excitation source is mainly transmitted through the air transmission path, and at this time, the working noise of the excitation source is optimized from the air transmission path to effectively reduce the transmission of the working noise of the excitation source to the user's ear.

[0069] The present invention provides a method for determining the contribution of an excitation source transfer path. The method firstly collects white noise emitted by a volume sound source arranged at a location of the excitation source through a first microphone arranged near an ear of a user to obtain first noise data, and collects white noise emitted by the volume sound source through a second microphone arranged at the location of the excitation source to obtain second noise data, obtains a first noise spectrum by processing the first noise data, and obtains a second noise spectrum by processing the second noise data; determines a noise attenuation spectrum according to the first noise spectrum and the second noise spectrum; collects working noise of the excitation source through the first microphone to obtain third noise data, and collects working noise of the excitation source through the second microphone to obtain fourth noise data; obtains a third noise spectrum by processing a waterfall diagram of the third noise data and performing an order analysis, and obtains a fourth noise spectrum by processing a waterfall diagram of the fourth noise data and performing an order analysis; determines a fifth noise spectrum of the working noise of the excitation source transmitted to the user's ear through the air according to the fourth noise spectrum and the noise attenuation spectrum; and determines the contribution of the air transfer path of the excitation source according to the third noise spectrum and the fifth noise spectrum. Therefore, by testing the noise attenuation of the excitation source (that is, the above-mentioned noise attenuation spectrum), the near-field noise when the excitation source is working (that is, the above-mentioned fourth noise spectrum), and the noise near the user's ear (that is, the above-mentioned third noise spectrum), the theoretical calculation result of the noise near the user's ear (that is, the above-mentioned fifth noise spectrum) is obtained by theoretical calculation, and the theoretical calculation result of the noise near the user's ear is compared with the actual test result (that is, the above-mentioned third noise spectrum). According to the energy contribution method, the contribution of the noise emitted by the excitation source when it is working to be transmitted through the air transfer path is determined, so that the contribution of the air transfer path to the working noise of the excitation source can be quantified.

[0070] In combination with the above embodiments, in one implementation, the present invention also provides a method for determining the contribution of the excitation source transfer path. In the method for determining the contribution of the excitation source transfer path, step S5 includes steps S51 to S55:

[0071] Step S51: Obtain a first order analysis result by performing waterfall diagram processing and order analysis on the third noise data.

[0072] In this embodiment, the third noise data is input into a related tool for waterfall diagram processing and order analysis processing to obtain a corresponding first order analysis result, which includes a noise spectrum of the noise at different frequencies.

[0073] Step S52: Determine the problem frequency of the excitation source according to the first order analysis result.

[0074] In this embodiment, the noise generated by the excitation source exists at multiple different frequencies, and only the noise at some frequencies is the noise at a frequency that the user subjectively feels unacceptable, and this frequency is the problem frequency. To solve the NVH problem of the excitation source, it is first necessary to determine the problem frequency. The process of determining the problem frequency includes but is not limited to first conducting NVH experiments, collecting noise data, and then converting it into the frequency domain. The frequency segment with larger energy corresponds better to the subjective evaluation problem, so the frequency segment with larger energy is identified, and the collected noise is played back with a bandpass filter (that is, only listening to this frequency segment) or a bandstop filter (filtering out this frequency segment) to confirm whether the unacceptable noise heard by the user is the noise at this frequency. If so, the frequency heard or filtered out is the problem frequency. Therefore, the present invention first determines the problem frequency of the excitation source based on the first-order analysis results.

[0075] Step S53: determining a third noise spectrum at the problem frequency in the first order analysis result according to the problem frequency.

[0076] In this embodiment, the first order analysis result includes noise spectra at different frequencies, and the different frequencies include the problem frequency of the excitation source. After the problem frequency of the excitation source is determined, based on the determined problem frequency, the noise spectrum at the problem frequency is screened out from the first order analysis result, and the noise spectrum is the third noise spectrum.

[0077] Step S54: Obtain a second order analysis result by performing waterfall diagram processing and order analysis on the fourth noise data.

[0078] In this embodiment, similar to the implementation of the above-mentioned step S51, the fourth noise data is input into the relevant tool for waterfall diagram processing and order analysis processing to obtain the corresponding second-order analysis result. The second-order analysis result includes the noise spectrum of the noise at different frequencies, and the different frequencies will also include the problem frequency of the excitation source.

[0079] Step S55: determining a fourth noise spectrum at the problematic frequency in the second order analysis result according to the determined problematic frequency of the excitation source.

[0080] In this embodiment, based on the determined problem frequency, the noise spectrum at the problem frequency is screened out from the second-order analysis result, and the noise spectrum is the fourth noise spectrum. The related tools include but are not limited to MATLAB, test.Lab and other tools.

[0081] In combination with the above embodiments, in one implementation, an embodiment of the present invention further provides a method for determining the contribution of the excitation source transfer path. In the method for determining the contribution of the excitation source transfer path, the problem frequency of the excitation source is determined according to the first order analysis result, including steps S01 to S03:

[0082] Step S01: determining the noise energy corresponding to each frequency in the first order analysis result.

[0083] Step S02: Compare the noise energy corresponding to each of the frequencies with a set threshold to obtain a comparison result.

[0084] Step S03: when the comparison result indicates that the noise energy corresponding to each frequency exceeds the set threshold, the frequency corresponding to the maximum noise energy among the noise energies exceeding the set threshold is determined as the problem frequency.

[0085] In this embodiment, an optional implementation method for determining the problem frequency of the excitation source is: based on the obtained first-order analysis results, determine whether the noise energy at each frequency exceeds the set threshold, and for the frequency whose noise energy exceeds the set threshold, determine the frequency as the problem frequency, so that the problem frequency can be determined during the execution of the present invention without the need to determine the problem frequency of the excitation source in advance, thereby improving the efficiency of contribution determination. At the same time, when there are multiple frequencies exceeding the set threshold, the frequency with the largest noise energy is determined as the problem frequency. Among them, the set threshold can be set according to the actual application scenario, and is not specifically limited here.

[0086] In this embodiment, the noise generated by the excitation source exists at multiple different frequencies, and only the noise at some frequencies is the noise at a frequency that the user subjectively feels unacceptable, and this frequency is the problem frequency. To solve the NVH problem of the excitation source, it is first necessary to determine the problem frequency. The process of determining the problem frequency includes but is not limited to first conducting NVH experiments, collecting noise data, and then converting it into the frequency domain. The frequency segment with larger energy corresponds better to the subjective evaluation problem, so the frequency segment with larger energy is identified, and the collected noise is played back with a bandpass filter (that is, only listening to this frequency segment) or a bandstop filter (filtering out this frequency segment) to confirm whether the unacceptable noise heard by the user is the noise at this frequency. If so, the frequency heard or filtered out is the problem frequency. Then the present invention determines the contribution of the air transfer path to the working noise of the excitation source at the problem frequency. When it is determined that the contribution of the air transmission path to the working noise of the excitation source at the problem frequency exceeds the set threshold, the air transmission path is determined to be the most important transmission path of the working noise at the problem frequency, and the acoustic package of the car is strengthened and optimized, and sound-absorbing and insulating materials are added; if the structural transmission path is the most important transmission path of the working noise at the problem frequency, vibration isolation or strengthening brackets are added.

[0087] In combination with the above embodiments, in one implementation, the present invention also provides a method for determining the contribution of the excitation source transfer path. In the method for determining the contribution of the excitation source transfer path, step S2 includes steps S21 to S22:

[0088] Step S21: Obtain a first spectrum by performing time-frequency domain conversion processing on the first noise data.

[0089] Step S22: determining the first noise spectrum according to the first spectrum and the conjugate of the first spectrum.

[0090] Step S23: Obtain a second spectrum by performing time-frequency domain conversion processing on the second noise data.

[0091] Step S24: determining the second noise spectrum according to the second spectrum and the conjugate of the second spectrum.

[0092] In this embodiment, the noise data collected by the microphone is noise data, and the present invention needs to use frequency domain data when performing corresponding calculations. Therefore, one implementation method of the present invention for obtaining the first noise spectrum is: collect white noise emitted by a medium and high frequency volume sound source near the user's ear through a first microphone to obtain the first noise data; after obtaining the first noise data, perform a time-frequency domain conversion process on the first noise data through Fourier transform to obtain a first spectrum belonging to the frequency domain data. Since the first noise spectrum mentioned above in the present invention is an autopower spectrum, the first spectrum obtained by performing a time-frequency domain conversion process on the first noise data is a spectrum diagram. At this time, it is necessary to further multiply the first spectrum with the conjugate of the first spectrum to obtain the first noise spectrum belonging to the autopower spectrum.

[0093] In this embodiment, based on the same implementation method, a second microphone collects white noise emitted by a medium and high frequency volume sound source at the location of the excitation source to obtain second noise data; after obtaining the second noise data, the second noise data is converted into a time-frequency domain by Fourier transform to obtain a second spectrum belonging to the frequency domain data. At this time, it is necessary to further multiply the second spectrum with the conjugate of the second spectrum to obtain a second noise spectrum belonging to the autopower spectrum.

[0094] In combination with the above embodiments, in one implementation, the present invention also provides a method for determining the contribution of the excitation source transfer path. In the method for determining the contribution of the excitation source transfer path, step S3 includes: obtaining a noise attenuation spectrum by dividing the second noise spectrum by the first noise spectrum.

[0095] In this embodiment, an implementation of the above step S2 is to substitute the first noise spectrum and the second noise spectrum determined in step S1 into the following formula (1) for calculation to obtain the corresponding noise attenuation spectrum:

[0096] NR(f)=p standard source (f) / p St_driver ear (f) (1)

[0097] Where NR(f) is the noise attenuation spectrum, expressed in dB; p standard source (f) is the second noise spectrum; p St_driver ear (f) is the first noise spectrum.

[0098] In combination with the above embodiments, in one implementation, the present invention also provides a method for determining the contribution of the excitation source transfer path. In the method for determining the contribution of the excitation source transfer path, step S6 includes: obtaining a fifth noise spectrum by dividing the fourth noise spectrum by the noise attenuation spectrum.

[0099] In this embodiment, an implementation of the above step S6 is to substitute the fourth noise spectrum determined by step S5 and the noise attenuation spectrum determined by step S3 into the following formula (2) for calculation to obtain the corresponding fifth noise spectrum:

[0100] p predicted noise (f) = p excitation source (f) / NR(f) (2)

[0101] Among them, p predicted noise (f) is the fifth noise spectrum; p excitation source (f) is the fourth noise spectrum.

[0102] In combination with the above embodiments, in one implementation, the present invention also provides a method for determining the contribution of the excitation source transfer path. In the method for determining the contribution of the excitation source transfer path, step S7 includes steps S71 to S72:

[0103] Step S71: determining a measured sound pressure level at a problem frequency according to the third noise spectrum, and determining a theoretical sound pressure level at the problem frequency according to the second order analysis result.

[0104] In this embodiment, after obtaining the third noise spectrum at the problem frequency, the measured sound pressure level of the working noise of the excitation source at the problem frequency transmitted to the user's ear is obtained by performing sound pressure level conversion calculation on the third noise spectrum. After obtaining the fifth noise spectrum at the problem frequency, the theoretical sound pressure level of the working noise of the excitation source at the problem frequency transmitted to the user's ear through the air transmission path is obtained by performing sound pressure level conversion calculation on the fifth noise spectrum.

[0105] Step S72: determining the air transfer path contribution of the excitation source according to the measured sound pressure level and the theoretical sound pressure level.

[0106] In this embodiment, after obtaining the measured sound pressure level and the theoretical sound pressure level of the working noise of the excitation source at the problem frequency through step S71, the contribution of the working noise of the excitation source at the problem frequency to the transmission through the air transfer path is obtained by calculating the measured sound pressure level and the theoretical sound pressure level.

[0107] In combination with the above embodiments, in one implementation, the present invention also provides a method for determining the contribution of the excitation source transfer path. In the method for determining the contribution of the excitation source transfer path, step S72 includes steps S7201 to S7202:

[0108] Step S7201: Determine measured noise energy according to the measured sound pressure level, and determine theoretical noise energy according to the theoretical sound pressure level.

[0109] In this embodiment, after the measured sound pressure level and the theoretical sound pressure level are obtained in step S71, the measured sound pressure level and the theoretical sound pressure level are respectively substituted into the following formula (3) and formula (4) for calculation to obtain the corresponding measured noise energy and theoretical noise energy respectively:

[0110]

[0111]

[0112] Among them, E test To measure the noise energy; E airbone is the theoretical noise energy; L test To measure the sound pressure level; L predicted is the theoretical sound pressure level.

[0113] Step S7202: Divide the theoretical noise energy by the measured noise energy to obtain a second target value, and determine the second target value as the air transfer path contribution of the excitation source at the problem frequency.

[0114] In this embodiment, after the measured noise energy and the theoretical noise energy are calculated and obtained in step S7201, the second target value is obtained by dividing the calculated theoretical noise energy by the calculated measured noise energy, and the second target value is determined as the contribution of the working noise of the excitation source to be transmitted in the air transmission path at the problem frequency. In this way, the contribution of the working noise of the excitation source to be transmitted in the air transmission path at the problem frequency can be accurately determined.

[0115] Specifically, the air transfer path contribution of the excitation source is calculated by the following formula:

[0116]

[0117] Among them, Contribution airbone E is the contribution of the air transfer path of the excitation source; airbone It is the theoretical noise energy transmitted from the radiated noise of the excitation source to the driver's ear in the car through the air transmission path; E test It is the measured noise energy at the driver's ear when the excitation source is working, obtained from actual tests.

[0118] In combination with the above embodiments, in one implementation, the present invention also provides a method for determining the contribution of the excitation source transfer path. In the method for determining the contribution of the excitation source transfer path, step S72 includes steps S721 to S723:

[0119] Step S721: Obtain a first target value by subtracting the measured sound pressure level from the theoretical sound pressure level.

[0120] In this embodiment, the theoretical sound pressure level obtained in step S71 is subtracted from the measured sound pressure level obtained in step S71 to obtain a corresponding calculation result, that is, a first target value.

[0121] Step S722: Compare the first target value with each preset value range to determine the preset value range in which the first target value is located, and each preset value range corresponds to each contribution degree.

[0122] In this embodiment, multiple preset value ranges are calibrated in advance, and a one-to-one correspondence between each preset value range and the contribution of each air transfer path is constructed. In a preferred embodiment, the multiple preset value ranges calibrated in advance include: greater than 6dB, less than 6dB and greater than 3dB, less than 3dB and greater than 1dB, and less than 1dB; the one-to-one correspondence between the preset value ranges and the contribution of the air transfer path constructed includes: when the preset value range is greater than 6dB, the contribution of the corresponding air transfer path is within 25%; when the preset value range is less than 6dB and greater than 3dB, the contribution of the corresponding air transfer path is between 25% and 50%; when the preset value range is less than 3dB and greater than 1dB, the contribution of the corresponding air transfer path is between 50% and 79.4%; when the preset value range is less than 1dB, the contribution of the corresponding air transfer path is within 20.6%. The one-to-one correspondence between the preset value ranges and the contribution of the preset value ranges to the air transmission path is only a preferred implementation, and the one-to-one correspondence between the preset value ranges and the contribution of the preset value ranges to the air transmission path can also be other value ranges and other correspondences, which are not specifically limited here. The first target value obtained in step S721 is compared with each preset value range to determine the preset value range in which the first target value is located.

[0123] Step S723: determining the preset value range in which the first target value is located as the target value range, and determining the contribution corresponding to the target value range as the air transfer path contribution of the excitation source at the problem frequency.

[0124] In this embodiment, the preset value range in which the first target value is located is determined as the target value range, and then the contribution of the air transfer path corresponding to the target value range is determined through the one-to-one correspondence between each preset value range and the contribution of each air transfer path, and the determined contribution of the air transfer path is determined as the contribution of the working noise of the excitation source transmitted in the air transfer path at the problem frequency. Thus, by dividing multiple preset value ranges and constructing a one-to-one correspondence between the preset value ranges and the contribution of the air transfer path, it is convenient to quickly determine the contribution of the working noise of the excitation source transmitted in the air transfer path.

[0125] A second aspect of the present invention provides a device for determining the contribution of a transfer path of an excitation source, such as Figure 2 As shown, the device 200 includes:

[0126] The first noise data acquisition module 201 is used to collect white noise emitted by a volume sound source through a first microphone to obtain first noise data, and to collect white noise emitted by a volume sound source through a second microphone to obtain second noise data, wherein the first microphone is arranged near the ear of the user, and the volume sound source and the second microphone are arranged at the location of the excitation source;

[0127] A first noise data processing module 202, configured to obtain a first noise spectrum by processing the first noise data, and to obtain a second noise spectrum by processing the second noise data;

[0128] A noise attenuation spectrum determining module 203, configured to determine a noise attenuation spectrum according to the first noise spectrum and the second noise spectrum;

[0129] The second noise data acquisition module 204 is used to collect the working noise of the excitation source through the first microphone to obtain third noise data, and to collect the working noise of the excitation source through the second microphone to obtain fourth noise data;

[0130] The second noise data processing module 205 is used to obtain a third noise spectrum by processing the third noise data, and to obtain a fourth noise spectrum by processing the fourth noise data;

[0131] A noise spectrum determination module 206, configured to determine a fifth noise spectrum of the working noise of the excitation source transmitted to the ear of the user through the air according to the fourth noise spectrum and the noise attenuation spectrum;

[0132] The contribution determination module 207 is used to determine the air transfer path contribution of the excitation source according to the third noise spectrum and the fifth noise spectrum.

[0133] Optionally, the second noise data processing module 205 includes:

[0134] A first analysis module, configured to obtain a first order analysis result by performing waterfall diagram processing and order analysis on the third noise data;

[0135] A problem frequency determination module, used to determine the problem frequency of the excitation source according to the first order analysis result;

[0136] A first determination module, configured to determine, according to the problem frequency, a third noise spectrum at the problem frequency in the first order analysis result;

[0137] A second analysis module, used for obtaining a second order analysis result by performing waterfall diagram processing and order analysis on the fourth noise data;

[0138] The second determination module is used to determine a fourth noise spectrum at the problematic frequency in the second order analysis result according to the determined problematic frequency of the excitation source.

[0139] Optionally, the problem frequency determination module includes:

[0140] A noise energy determination module, used to determine the noise energy corresponding to each frequency in the first order analysis result;

[0141] A noise energy comparison module, used to compare the noise energy corresponding to each frequency with a set threshold to obtain a comparison result;

[0142] The problem frequency determination module is used to determine the frequency corresponding to the maximum noise energy among the noise energies exceeding the set threshold as the problem frequency when the comparison result indicates that the noise energy corresponding to each of the frequencies exceeds the set threshold.

[0143] Optionally, the contribution determination module 207 includes:

[0144] a sound pressure level determination module, configured to determine a measured sound pressure level at a problem frequency according to the third noise spectrum, and to determine a theoretical sound pressure level at the problem frequency according to the fifth noise spectrum;

[0145] The contribution determination submodule is used to determine the air transfer path contribution of the excitation source according to the measured sound pressure level and the theoretical sound pressure level.

[0146] Optionally, the contribution determination submodule includes:

[0147] A first target value determination module, configured to obtain a first target value by subtracting the measured sound pressure level from the theoretical sound pressure level;

[0148] a value range determination module, used for comparing the first target value with each preset value range to determine the preset value range in which the first target value is located, wherein each preset value range corresponds to each contribution degree;

[0149] The first contribution determination module is used to determine a preset value range in which the first target value is located as a target value range, and determine the contribution corresponding to the target value range as the air transfer path contribution of the excitation source at the problem frequency.

[0150] Optionally, the contribution determination submodule includes:

[0151] A noise energy determination module, configured to determine a measured noise energy according to the measured sound pressure level, and to determine a theoretical noise energy according to the theoretical sound pressure level;

[0152] The second contribution determination module is used to obtain a second target value by dividing the theoretical noise energy by the measured noise energy, and determine the second target value as the air transfer path contribution of the excitation source at the problem frequency.

[0153] Optionally, the noise data processing first module 202 includes:

[0154] A first spectrum determination module, configured to obtain a first spectrum by performing time-frequency domain conversion processing on the first noise data;

[0155] A first noise spectrum determining module, configured to determine the first noise spectrum according to the first spectrum and the conjugate of the first spectrum;

[0156] A second spectrum determination module, configured to obtain a second spectrum by performing time-frequency domain conversion processing on the second noise data;

[0157] The second noise spectrum determining module is used to determine the second noise spectrum according to the second spectrum and the conjugate of the second spectrum.

[0158] A third aspect of an embodiment of the present invention provides an electronic device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the computer program is executed by the processor, the method for determining the contribution of an excitation source transfer path as described in the first aspect of the present invention is implemented.

[0159] A fourth aspect of an embodiment of the present invention provides a computer-readable storage medium having a computer program stored thereon. When the computer program is executed by a processor, the method for determining a contribution of a transfer path of an excitation source as described in the first aspect of the present invention is implemented.

[0160] It should be noted that, for the sake of simplicity, the method embodiments are described as a series of action combinations, but those skilled in the art should be aware that the embodiments of the present invention are not limited by the order of the actions described, because according to the embodiments of the present invention, certain steps can be performed in other orders or simultaneously. Secondly, those skilled in the art should also be aware that the embodiments described in the specification are all preferred embodiments, and the actions involved are not necessarily required by the embodiments of the present invention.

[0161] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented by software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the process or function described in the embodiment of the present invention is generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions can be transmitted from one website site, computer, server or data center to another website site, computer, server or data center by wired (e.g., coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that a computer can access or a data storage device such as a server or data center that includes one or more available media integrated. The available medium can be a magnetic medium (e.g., a floppy disk, a hard disk, a tape), an optical medium (e.g., a DVD), or a semiconductor medium (e.g., a solid-state hard disk Solid State Disk (SSD)), etc.

[0162] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0163] Each embodiment in this specification is described in a related manner, and the same or similar parts between the embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the system embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment.

[0164] The above description is only a preferred embodiment of the present invention and is not intended to limit the protection scope of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention are included in the protection scope of the present invention.

Claims

1. A method for determining the contribution of an excitation source transfer path, characterized in that: The method comprises: Collecting white noise emitted by a volume sound source through a first microphone to obtain first noise data, and collecting white noise emitted by a volume sound source through a second microphone to obtain second noise data, wherein the first microphone is arranged near an ear of a user, and the volume sound source and the second microphone are arranged at a location where an excitation source is located; Obtaining a first noise spectrum by processing the first noise data, and obtaining a second noise spectrum by processing the second noise data; determining a noise attenuation spectrum according to the first noise spectrum and the second noise spectrum; collecting the working noise of the excitation source through the first microphone to obtain third noise data, and collecting the working noise of the excitation source through the second microphone to obtain fourth noise data; obtaining a third noise spectrum by processing the third noise data, and obtaining a fourth noise spectrum by processing the fourth noise data; Determine, according to the fourth noise spectrum and the noise attenuation spectrum, a fifth noise spectrum of the working noise of the excitation source transmitted to the ear of the user through the air; An air transfer path contribution of the excitation source is determined according to the third noise spectrum and the fifth noise spectrum.

2. The method for determining the contribution of the excitation source transfer path according to claim 1, characterized in that: The step of obtaining a third noise spectrum by processing the third noise data and obtaining a fourth noise spectrum by processing the fourth noise data comprises: Obtaining a first order analysis result by performing waterfall diagram processing and order analysis on the third noise data; Determining the problem frequency of the excitation source according to the first order analysis result; Determine, according to the problem frequency, a third noise spectrum at the problem frequency in the first order analysis result; Obtaining a second order analysis result by performing waterfall diagram processing and order analysis on the fourth noise data; According to the determined problematic frequency of the excitation source, a fourth noise spectrum at the problematic frequency in the second order analysis result is determined.

3. The method for determining the contribution of the excitation source transfer path according to claim 2, characterized in that: Determining the problem frequency of the excitation source according to the first-order analysis result includes: Determine the noise energy corresponding to each frequency in the first order analysis result; Comparing the noise energy corresponding to each of the frequencies with a set threshold to obtain a comparison result; When the comparison result indicates that the noise energy corresponding to each frequency exceeds the set threshold, the frequency corresponding to the maximum noise energy among the noise energies exceeding the set threshold is determined as the problem frequency.

4. The method for determining the contribution of the excitation source transfer path according to claim 1, characterized in that: The step of determining the air transfer path contribution of the excitation source according to the third noise spectrum and the fifth noise spectrum includes: Determine a measured sound pressure level at the problem frequency according to the third noise spectrum, and determine a theoretical sound pressure level at the problem frequency according to the fifth noise spectrum; The air transfer path contribution of the excitation source is determined according to the measured sound pressure level and the theoretical sound pressure level.

5. The method for determining the contribution of the excitation source transfer path according to claim 2, characterized in that: The step of determining the air transfer path contribution of the excitation source according to the measured sound pressure level and the theoretical sound pressure level comprises: Obtaining a first target value by subtracting the measured sound pressure level from the theoretical sound pressure level; Comparing the first target value with each preset value range to determine the preset value range in which the first target value is located, wherein each preset value range corresponds to each contribution degree; The preset value range within which the first target value is located is determined as the target value range, and the contribution corresponding to the target value range is determined as the air transfer path contribution of the excitation source at the problem frequency.

6. The method for determining the contribution of the excitation source transfer path according to claim 2, characterized in that: The step of determining the air transfer path contribution of the excitation source according to the measured sound pressure level and the theoretical sound pressure level comprises: Determining a measured noise energy according to the measured sound pressure level, and determining a theoretical noise energy according to the theoretical sound pressure level; The theoretical noise energy is divided by the measured noise energy to obtain a second target value, and the second target value is determined as the air transfer path contribution of the excitation source at the problem frequency.

7. The method for determining the contribution of the excitation source transfer path according to claim 1, characterized in that: The obtaining of a first noise spectrum by processing the first noise data and the obtaining of a second noise spectrum by processing the second noise data include: Obtaining a first spectrum by performing time-frequency domain conversion processing on the first noise data; determining the first noise spectrum according to the first frequency spectrum and the conjugate of the first frequency spectrum; Obtaining a second spectrum by performing time-frequency domain conversion processing on the second noise data; The second noise spectrum is determined according to the second frequency spectrum and a conjugate of the second frequency spectrum.

8. A device for determining the contribution of an excitation source transfer path, characterized in that: The device comprises: The first noise data acquisition module is used to collect white noise emitted by a volume sound source through a first microphone to obtain first noise data, and to collect white noise emitted by the volume sound source through a second microphone to obtain second noise data, wherein the first microphone is arranged near the ear of the user, and the volume sound source and the second microphone are arranged at the location of the excitation source; A first noise data processing module, configured to obtain a first noise spectrum by processing the first noise data, and to obtain a second noise spectrum by processing the second noise data; a noise attenuation spectrum determining module, configured to determine a noise attenuation spectrum according to the first noise spectrum and the second noise spectrum; A second noise data acquisition module is used to collect the working noise of the excitation source through the first microphone to obtain third noise data, and to collect the working noise of the excitation source through the second microphone to obtain fourth noise data; A second noise data processing module, configured to obtain a third noise spectrum by processing the third noise data, and to obtain a fourth noise spectrum by processing the fourth noise data; A noise spectrum determination module, configured to determine a fifth noise spectrum of the working noise of the excitation source transmitted to the ear of the user through the air according to the fourth noise spectrum and the noise attenuation spectrum; A contribution determination module is used to determine the air transfer path contribution of the excitation source according to the third noise spectrum and the fifth noise spectrum.

9. An electronic device, characterized in that: The method comprises a memory, a processor and a computer program stored in the memory and executable on the processor. When the computer program is executed by the processor, a method for determining a transfer path contribution of an excitation source as claimed in claims 1 to 7 is implemented.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the method for determining the contribution of the transfer path of an excitation source as claimed in claims 1 to 7 is implemented.

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