Method and system for detecting and evaluating use state of Bluetooth headset

Abstract

The invention discloses a method and system for detecting and evaluating the use state of a Bluetooth headset, and relates to the field of detection and evaluation of the use state of the headset, and the method comprises the steps: analyzing bone conduction acoustic impedance characteristics in an audio conduction process, and evaluating the audio conduction balance states of left and right sound channels of the headset at different frequencies; analyzing the correlation degree between the bone conduction vibration frequency and the skull conductivity of the earphone under different frequencies, and evaluating the conduction synchronism of the audio signal between the earphone and the skull; the frequency response stability of bone conduction is comprehensively evaluated through multi-band frequency response characteristics, response consistency scores and smoothness scores, user bone feedback sound waves are analyzed, signal attenuation and distortion conditions in a conduction path are detected, and the quality of the feedback sound waves is evaluated; the conduction synchronism of audio signals between the earphone and the skull, the frequency response stability of bone conduction and the quality of feedback sound waves are comprehensively analyzed, and the conduction quality state when the Bluetooth earphone is used is comprehensively evaluated and judged.

Description

Technical Field

[0001] The present invention relates to the field of detection and evaluation of earphone usage status, and in particular to a method for detecting and evaluating the usage status of a Bluetooth earphone. Background Art

[0002] When hearing-impaired people use bone conduction Bluetooth headphones, it is crucial to detect the quality of the headphones to ensure their functionality. Because hearing-impaired people perceive audio signals differently from normal hearing people, it is difficult for users to quickly and accurately identify whether there are problems with the quality of the headphones, especially when there are subtle changes in the sound, and it is even more difficult to identify problems such as deteriorated sound quality and unbalanced sound channels.

[0003] This scheme proposes a Bluetooth bone conduction headset usage status detection method based on audio signal conduction synchronization, frequency response stability and feedback sound wave conduction quality. It analyzes the conduction status of the headset in actual use in multiple dimensions, identifies the stability and accuracy of audio conduction, and helps to determine whether the conduction quality and usage status of the headset are normal. Summary of the invention

[0004] In order to solve the above technical problems, a method for detecting and evaluating the usage status of a Bluetooth headset is provided. This technical solution solves the problems raised in the above background technology.

[0005] In order to achieve the above purpose, the technical solution adopted by the present invention is:

[0006] A method for detecting and evaluating the use status of a Bluetooth headset, comprising:

[0007] Analyze the bone conduction acoustic impedance characteristics during audio conduction and evaluate the audio conduction balance of the left and right channels of the headphones at different frequencies;

[0008] Analyze the correlation between the bone conduction vibration frequency of the headphones and the conductivity of the skull at different frequencies, and evaluate the conduction synchronization of the audio signal between the headphones and the skull;

[0009] The frequency response stability of bone conduction is comprehensively evaluated through multi-band frequency response characteristics, response consistency score and smoothness score;

[0010] Analyze the user's bone feedback sound waves, detect signal attenuation and distortion in the conduction path, and evaluate the quality of the feedback sound waves;

[0011] The conduction quality status of the Bluetooth headset when in use is comprehensively evaluated by comprehensively analyzing the conduction synchronization of the audio signal between the headset and the skull, the frequency response stability of bone conduction, and the quality of the feedback sound waves.

[0012] Preferably, the analyzing of the bone conduction acoustic impedance characteristics during the audio conduction process to evaluate the audio conduction balance state of the left and right channels of the earphone at different frequencies specifically includes:

[0013] Measure the comprehensive equivalent impedance value of the left and right channels of the headphones at different bone conduction frequencies;

[0014] Analyze the relative impedance matching of each frequency of the left and right channels, calculate the vibration conduction efficiency of each frequency of the left and right channels respectively, and quantify the actual vibration conduction effect of the audio signal at different frequencies. The vibration conduction efficiency calculation formula is:

[0015]

[0016] Where ηf represents the vibration transmission efficiency at frequency f, which is used to reflect the actual impedance Zf compared to the preset ideal impedance Z opt The relative impedance matching degree;

[0017] Based on the calculation results of the conduction efficiency at multiple frequencies, the impedance matching curves of the left and right channels are drawn to depict the conduction performance of the left and right channels of the headphones in the entire frequency spectrum.

[0018] Compare the impedance matching curve characteristics of the left and right channels, calculate the cumulative conduction efficiency deviation distribution symmetry score, and evaluate the difference in conduction performance between the left and right headphones. The calculation expression for the cumulative conduction efficiency deviation distribution symmetry score is:

[0019]

[0020] Where D f is the cumulative conduction efficiency deviation distribution symmetry score, f min 、f max are the minimum and maximum frequencies of the impedance matching curve interval, η left f and η right f represents the vibration conduction efficiency of the left and right channels of the earphone at frequency f respectively;

[0021] A qualified symmetry score value is set. When the cumulative conduction efficiency deviation distribution symmetry score is less than the qualified symmetry score value, the left and right channels of the earphone are marked as being in a conduction unbalanced state.

[0022] Preferably, analyzing the correlation between the bone conduction vibration frequency of the headset at different frequencies and the conductivity of the skull, and evaluating the conduction synchronization of the audio signal between the headset and the skull specifically includes:

[0023] Set the monitoring time window and set the preset frequency points with uniform frequency growth within the time window;

[0024] Sequentially measure the bone conduction vibration frequency of the left and right channels of the earphones at each frequency point and the conductivity of the skull at the preset frequency points in the monitoring time window;

[0025] Among them, the conductivity of the skull is comprehensively evaluated by the amplitude of the input signal entering the bone and the amplitude of the output signal leaving the bone, combined with the conductivity constant of the bone characteristics;

[0026] After obtaining the bone conduction vibration frequency and conductivity, the correlation between the bone conduction vibration frequency and skull conductivity was determined by calculating the synchronization correlation score;

[0027] The calculation formula for synchronization relevance score is:

[0028]

[0029] In the formula, R sync Score the synchronization correlation, f vib f i , Cf i The frequencies are f i The bone conduction vibration frequency and the quantified value of skull conductivity under are the mean values ​​of vibration frequency and conductivity quantization value, f i is the input frequency corresponding to the th preset frequency point, and n is the total number of preset frequency points set within the set monitoring time window;

[0030] The system performs synchronization analysis on the frequencies of the left and right channels of the headphones respectively, and obtains synchronization correlation scores corresponding to the left and right channels of the headphones.

[0031] Preferably, the comprehensive evaluation of the frequency response stability of bone conduction through multi-band frequency response characteristics, response consistency score and smoothness score specifically includes:

[0032] Obtain different frequency points within the set monitoring time window for frequency band division;

[0033] Obtaining the average bone conduction vibration frequency of each divided frequency band, and the average amplitude corresponding to the bone conduction vibration frequency band;

[0034] The frequency response value of each divided frequency band is obtained by multiplying the average vibration amplitude and phase angle of the frequency band to describe the response characteristics of the earphone in a specific frequency band;

[0035] The system calculates the degree to which the response values ​​of different divided frequency bands deviate from the average response and quantifies the results into a consistency score;

[0036] Analyze the smoothness of the frequency response curve. The system calculates the rate of change of adjacent frequency response values ​​to detect whether there are sudden changes or irregular fluctuations in the curve.

[0037] Based on the frequency response consistency score and smoothness score of the left and right channels of the headphones, the frequency response stability score of the left and right channel bone conduction is calculated through weighted comprehensive calculation to evaluate the frequency response stability of bone conduction.

[0038] Preferably, the analyzing of the user's bone feedback sound waves, detecting the signal attenuation and distortion in the conduction path, and evaluating the quality of the feedback sound waves specifically includes:

[0039] Collect the feedback sound wave signal after the earphone is transmitted to the skull;

[0040] Comprehensively quantify the basic acoustic characteristics of the earphone during the conduction process based on the frequency, amplitude and waveform of the feedback sound wave;

[0041] Detect the amplitude change of the feedback signal relative to the original audio signal and evaluate the energy attenuation in the conduction path;

[0042] After the signal attenuation analysis, the distortion of the feedback sound wave is further analyzed, and the feedback signal is integrated and compared with the waveform of the original signal to quantify the distortion and identify the distortion in the conduction path;

[0043] The attenuation ratio and distortion of the feedback sound wave signals of the left and right channels of the headphones are obtained, and the feedback quality score is calculated through a weighted comprehensive score to evaluate the overall feedback quality of the left and right channels of the headphones in different frequency bands.

[0044] Preferably, the comprehensive analysis of the conduction synchronization of the audio signal between the headset and the skull, the frequency response stability of bone conduction, and the quality of the feedback sound wave, and the comprehensive evaluation and judgment of the conduction quality state of the Bluetooth headset when in use specifically includes:

[0045] When the left and right channels of the earphone are in a conduction unbalanced state, the conduction synchronization correlation score, frequency response stability score, and feedback quality score of the left and right channel audio signals of the earphone between the earphone and the skull are obtained respectively;

[0046] Based on the conduction synchronization correlation score, frequency response stability score, and feedback quality score of the left and right channel audio signals between the earphones and the skull, the comprehensive conduction quality status scores of the left and right earphones are calculated respectively. The conduction quality status score calculation method is:

[0047]

[0048] Where M is the conduction quality status score, R sta , R rec They are the frequency response stability score and feedback quality score, α1 and α2 are R sta , R rec The weight coefficient of

[0049] Setting a conduction quality status score standard value, comparing the conduction quality status scores of the left and right earphones with the conduction quality status score standard value respectively, marking the earphones that do not reach the standard value as having a poor conduction quality status, and marking the earphones that reach the standard value as having a qualified conduction quality status;

[0050] The conduction quality status of the earphone is synchronized to the user terminal for real-time conduction quality status monitoring.

[0051] Furthermore, a detection and evaluation system for the use status of a Bluetooth headset is proposed, which is used to implement the detection and evaluation method for the use status of a Bluetooth headset as described above, including:

[0052] A conduction balance state judgment module, wherein the conduction balance state judgment module analyzes the relative impedance matching degree of each frequency of the left and right channels, calculates the vibration conduction efficiency of each frequency of the left and right channels respectively, quantifies the actual vibration conduction effect of the audio signal at different frequencies, compares the impedance matching curve characteristics of the left and right channels, calculates the cumulative conduction efficiency deviation distribution symmetry score, evaluates the conduction performance difference between the left and right headphones, and judges whether the left and right channels of the headphones are in a conduction unbalanced state based on the cumulative conduction efficiency deviation distribution symmetry score;

[0053] A conduction synchronization evaluation module, which sequentially measures the bone conduction vibration frequency of the left and right channels of the earphones at each frequency point and the conductivity of the skull at preset frequency points, calculates a synchronization correlation score, and determines the correlation between the bone conduction vibration frequency and the conductivity of the skull;

[0054] A frequency response stability evaluation module, which calculates the degree to which the response values ​​of different divided frequency bands deviate from the average response, quantifies the result into a consistency score, and analyzes the smoothness of the frequency response curve to detect whether the curve has a sudden change or irregular fluctuation. Based on the frequency response consistency score and smoothness score of the left and right channels of the headset, the frequency response stability score of the left and right channel bone conduction is calculated by weighted comprehensive calculation;

[0055] A feedback sound wave conduction quality assessment module, which detects the amplitude change of the feedback signal relative to the original audio signal according to the basic acoustic characteristics of the quantified earphone during the conduction process, assesses the energy attenuation in the conduction path, analyzes the distortion of the feedback sound wave, integrates and compares the waveform of the feedback signal with that of the original signal to quantify the distortion, and calculates the feedback quality score through a weighted comprehensive score;

[0056] The conduction quality status judgment module calculates the comprehensive conduction quality status scores of the left and right headphones based on the conduction synchronization correlation score, frequency response stability score, and feedback quality score of the left and right channel audio signals of the headphones between the headphones and the skull, and judges the current conduction quality status of the left and right headphones based on the scoring results.

[0057] Compared with the prior art, the present invention has the following beneficial effects:

[0058] Analyze the bone conduction acoustic impedance characteristics during audio conduction, and evaluate the audio conduction balance of the left and right channels of the headset at different frequencies. Analyze the correlation between the bone conduction vibration frequency and the skull conductivity of the headset at different frequencies, and evaluate the conduction synchronization of the audio signal between the headset and the skull. Comprehensively evaluate the frequency response stability of bone conduction through multi-band frequency response characteristics, response consistency score and smoothness score. Analyze the user's bone feedback sound waves, detect signal attenuation and distortion in the conduction path, and evaluate the quality of the feedback sound waves. Comprehensively analyze the conduction synchronization of the audio signal between the headset and the skull, the frequency response stability of bone conduction, and the quality of the feedback sound waves, and comprehensively evaluate and judge the conduction quality status of the Bluetooth headset when in use.

[0059] Taking into account various factors, a multi-dimensional Bluetooth bone conduction headset usage status detection method is proposed to analyze the conduction status of the headset in actual use, identify the stability and accuracy of audio conduction, and help determine whether the conduction quality and usage status of the headset are normal. BRIEF DESCRIPTION OF THE DRAWINGS

[0060] Figure 1 A flow chart of a method for detecting and evaluating the use status of a Bluetooth headset of the present invention;

[0061] Figure 2 The flow chart of analyzing the bone conduction acoustic impedance characteristics during the audio conduction process and evaluating the audio conduction balance state of the left and right channels of the earphone at different frequencies according to the present invention;

[0062] Figure 3 A flow chart of analyzing the correlation between the bone conduction vibration frequency of the headset at different frequencies and the conductivity of the skull, and evaluating the conduction synchronization of the audio signal between the headset and the skull;

[0063] Figure 4 A flow chart of the present invention for comprehensively evaluating the frequency response stability of bone conduction through multi-band frequency response characteristics, response consistency score and smoothness score;

[0064] Figure 5 A flow chart of analyzing the user's bone feedback sound waves, detecting the signal attenuation and distortion in the conduction path, and evaluating the quality of the feedback sound waves in the present invention;

[0065] Figure 6 A flow chart of the conduction quality state of the Bluetooth headset when the present invention comprehensively analyzes the conduction synchronization of the audio signal between the headset and the skull, the frequency response stability of the bone conduction, and the quality of the feedback sound wave, and comprehensively evaluates and determines the conduction quality state of the Bluetooth headset when in use;

[0066] Figure 7 The present invention is a schematic diagram of the structure of a detection and evaluation system for the use status of a Bluetooth headset. DETAILED DESCRIPTION

[0067] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are only examples, and those skilled in the art may think of other obvious variations.

[0068] Reference Figure 1 As shown, a method for detecting and evaluating the use status of a Bluetooth headset includes:

[0069] Analyze the bone conduction acoustic impedance characteristics during audio conduction and evaluate the audio conduction balance of the left and right channels of the headphones at different frequencies;

[0070] Analyze the correlation between the bone conduction vibration frequency of the headphones and the conductivity of the skull at different frequencies, and evaluate the conduction synchronization of the audio signal between the headphones and the skull;

[0071] The frequency response stability of bone conduction is comprehensively evaluated through multi-band frequency response characteristics, response consistency score and smoothness score;

[0072] Analyze the user's bone feedback sound waves, detect signal attenuation and distortion in the conduction path, and evaluate the quality of the feedback sound waves;

[0073] The conduction quality status of the Bluetooth headset when in use is comprehensively evaluated by comprehensively analyzing the conduction synchronization of the audio signal between the headset and the skull, the frequency response stability of bone conduction, and the quality of the feedback sound waves.

[0074] Reference Figure 2 As shown in the figure, the bone conduction acoustic impedance characteristics in the audio conduction process are analyzed to evaluate the audio conduction balance of the left and right channels of the headphones at different frequencies. Specifically, the following are included:

[0075] The comprehensive equivalent impedance value of the left and right channels of the headphones is measured at different bone conduction frequencies. The change in acoustic impedance reflects the energy loss and storage in audio conduction. In actual operation, the system records the impedance data as a function of frequency to form the impedance spectrum of the headphones. If the impedance is too high or too low, it may indicate that the headphones have poor conduction.

[0076] Analyze the relative impedance matching of each frequency of the left and right channels, calculate the vibration conduction efficiency of each frequency of the left and right channels respectively, and quantify the actual vibration conduction effect of the audio signal at different frequencies. The vibration conduction efficiency calculation formula is:

[0077]

[0078] Where ηf represents the vibration transmission efficiency at frequency f, which is used to reflect the actual impedance Zf compared to the preset ideal impedance Z opt The vibration conduction efficiency effectively quantifies the degree to which the impedance deviates from the optimal state, ensuring that the audio signal can be effectively transmitted to the skull with minimal energy loss at different frequencies.

[0079] Based on the calculation results of the conduction efficiency at multiple frequencies, the impedance matching curves of the left and right channels are drawn to depict the conduction performance of the left and right channels of the headphones in the entire frequency spectrum.

[0080] Compare the impedance matching curve characteristics of the left and right channels, calculate the cumulative conduction efficiency deviation distribution symmetry score, and evaluate the difference in conduction performance between the left and right headphones. The calculation expression for the cumulative conduction efficiency deviation distribution symmetry score is:

[0081]

[0082] Where D f is the cumulative conduction efficiency deviation distribution symmetry score, f min 、f max are the minimum and maximum frequencies of the impedance matching curve interval, η left f and η right f represents the vibration conduction efficiency of the left and right channels of the earphone at frequency f respectively.

[0083] Analyze the symmetry of the impedance matching curves of the left and right earphones to determine whether the conduction performance of the left and right earphones is consistent. Ideally, the impedance curves of the left and right ears should have similar characteristics.

[0084] A qualified symmetry score value is set. When the cumulative conduction efficiency deviation distribution symmetry score is less than the qualified symmetry score value, the left and right channels of the earphone are marked as being in a conduction unbalanced state.

[0085] When the left and right sound channels of the earphones are in an unbalanced conduction state, it indicates that at least one of the left and right earphones has poor conduction quality.

[0086] Reference Figure 3 As shown in the figure, the correlation between the bone conduction vibration frequency of the headset and the skull conductivity at different frequencies is analyzed, and the synchronization of the conduction of the audio signal between the headset and the skull is evaluated, including:

[0087] Set the monitoring time window and set preset frequency points with uniform frequency growth within the time window. The frequency measurement range is usually between 500Hz and 4kHz to cover the main frequency band of human speech.

[0088] The bone conduction vibration frequency of the left and right channels of the earphones and the conductivity of the skull are measured sequentially at the preset frequency points in the monitoring time window.

[0089] Bone conduction vibration frequency refers to the vibration frequency of the earphone when it is in contact with the skull. It is calculated as the product of the ratio of the vibration at the current frequency to the maximum vibration amplitude and the set reference vibration frequency.

[0090] Among them, the conductivity of the skull is comprehensively evaluated by the amplitude of the input signal entering the bone and the amplitude of the output signal leaving the bone, combined with the conductivity constant of the bone characteristics. The specific calculation method is the product of the ratio of the amplitude of the input and output signals and the conductivity of the bone.

[0091] By analyzing the conductivity at different frequencies, the system can understand whether there is conduction loss in the contact between the earphone and the skull. This formula directly indicates the efficiency of bone conduction, and high conductivity indicates a good conduction path with low losses.

[0092] After obtaining the bone conduction vibration frequency and conductivity, the correlation between the bone conduction vibration frequency and skull conductivity was determined by calculating the synchronization correlation score;

[0093] The calculation formula for synchronization relevance score is:

[0094]

[0095] In the formula, R sync Score the synchronization correlation, f vib f i , Cf i The frequencies are f i The bone conduction vibration frequency and the quantified value of skull conductivity under are the mean values ​​of vibration frequency and conductivity quantization value, f i is the input frequency corresponding to the th preset frequency point, and n is the total number of preset frequency points set in the set monitoring time window.

[0096] The closer the synchronization score is to 1, the stronger the correlation between the bone conduction vibration frequency and the skull conductivity, which means that the audio signal of the headphones is more consistent during the conduction process; if the value is low, it may indicate that there is a frequency mismatch or conductivity deviation in the audio conduction process, resulting in poor conduction effect.

[0097] The system performs synchronization analysis on the frequencies of the left and right channels of the headphones respectively, and obtains synchronization correlation scores corresponding to the left and right channels of the headphones.

[0098] Reference Figure 4 As shown in the figure, the frequency response stability of bone conduction is comprehensively evaluated through multi-band frequency response characteristics, response consistency score and smoothness score, including:

[0099] Obtain different frequency points within the set monitoring time window for frequency band division;

[0100] Obtaining the average bone conduction vibration frequency of each divided frequency band, and the average amplitude corresponding to the bone conduction vibration frequency band;

[0101] The frequency response value of each divided frequency band is obtained by multiplying the average vibration amplitude and phase angle of the frequency band to describe the response characteristics of the earphone in a specific frequency band. The specific calculation method is:

[0102] R res (f j )=A vib (f j )*cos(θ vib (f));

[0103] In the formula, R res (f j ), A vib (f j ),θ vib (f j ) are frequency bands f j Frequency response value, vibration amplitude, θ vib (f) is the frequency band f j The actual vibration phase angle corresponding to each frequency point in the frequency band is divided and the average vibration amplitude is calculated, which can enhance the influence of the vibration phase angle on the frequency response characteristics.

[0104] The system calculates the degree to which the response values ​​of different divided frequency bands deviate from the average response and quantifies the results into consistency scores. The specific calculation method is:

[0105]

[0106] In the formula, S a Score the frequency response consistency, a higher score indicates better consistency, and m is the number of frequency measurement points is the frequency band f j The average frequency response value under .

[0107] The smoothness of the frequency response curve is analyzed. The system calculates the rate of change of adjacent frequency response values ​​to detect whether there is a sudden change or irregular fluctuation in the curve. The specific calculation method is:

[0108]

[0109] In the formula, S b Score the smoothness of the response curve.

[0110] Based on the frequency response consistency score and smoothness score of the left and right channels of the headphones, the frequency response stability score of the left and right channel bone conduction is calculated by weighted summation, which is used to evaluate the frequency response stability of bone conduction.

[0111] Reference Figure 5 As shown, analyzing the user's bone feedback sound waves, detecting the signal attenuation and distortion in the conduction path, and evaluating the quality of the feedback sound waves specifically include:

[0112] Collect the feedback sound wave signal after the earphone is transmitted to the skull;

[0113] Comprehensively quantify the basic acoustic characteristics of the earphone during the conduction process based on the frequency, amplitude and waveform of the feedback sound wave;

[0114] The amplitude change of the feedback signal relative to the original audio signal is detected to evaluate the energy attenuation in the conduction path. The specific calculation method is the ratio of the amplitude change of the feedback signal to the original audio signal.

[0115] After the signal attenuation analysis, the distortion of the feedback sound wave is further analyzed. The feedback signal is integrated and compared with the waveform of the original signal to quantify the distortion and identify the distortion in the conduction path. The distortion is calculated as follows:

[0116]

[0117] Where D dis is the signal distortion, ΔX is the deviation between the feedback signal waveform and the original signal waveform, X org is the original signal waveform.

[0118] The feedback sound wave signal attenuation ratio and distortion of the left and right channels of the headphones are obtained. This scheme uses weighted summation to calculate the feedback quality score, which is used to evaluate the overall feedback quality of the left and right channels of the headphones in different frequency bands.

[0119] Reference Figure 6 As shown, the conduction synchronization of the audio signal between the headset and the skull, the frequency response stability of bone conduction, and the quality of the feedback sound wave are comprehensively analyzed. The conduction quality status of the Bluetooth headset when used is comprehensively evaluated and judged, including:

[0120] When the left and right channels of the earphone are in a conduction unbalanced state, the conduction synchronization correlation score, frequency response stability score, and feedback quality score of the left and right channel audio signals of the earphone between the earphone and the skull are obtained respectively;

[0121] Based on the conduction synchronization correlation score, frequency response stability score, and feedback quality score of the left and right channel audio signals between the earphones and the skull, the comprehensive conduction quality status scores of the left and right earphones are calculated respectively. The conduction quality status score calculation method is:

[0122]

[0123] Where M is the conduction quality status score, R sta , R rec They are the frequency response stability score and feedback quality score, α1 and α2 are R sta , R rec The weight coefficient of

[0124] Setting a conduction quality status score standard value, comparing the conduction quality status scores of the left and right earphones with the conduction quality status score standard value respectively, marking the earphones that do not reach the standard value as having a poor conduction quality status, and marking the earphones that reach the standard value as having a qualified conduction quality status;

[0125] The conduction quality status of the earphone is synchronized to the user terminal for real-time conduction quality status monitoring.

[0126] Reference Figure 7 As shown, a detection and evaluation system for the use status of a Bluetooth headset includes:

[0127] A conduction balance state judgment module, wherein the conduction balance state judgment module analyzes the relative impedance matching degree of each frequency of the left and right channels, calculates the vibration conduction efficiency of each frequency of the left and right channels respectively, quantifies the actual vibration conduction effect of the audio signal at different frequencies, compares the impedance matching curve characteristics of the left and right channels, calculates the cumulative conduction efficiency deviation distribution symmetry score, evaluates the conduction performance difference between the left and right headphones, and judges whether the left and right channels of the headphones are in a conduction unbalanced state based on the cumulative conduction efficiency deviation distribution symmetry score;

[0128] A conduction synchronization evaluation module, which sequentially measures the bone conduction vibration frequency of the left and right channels of the earphones at each frequency point and the conductivity of the skull at preset frequency points, calculates a synchronization correlation score, and determines the correlation between the bone conduction vibration frequency and the conductivity of the skull;

[0129] A frequency response stability evaluation module, which calculates the degree to which the response values ​​of different divided frequency bands deviate from the average response, quantifies the result into a consistency score, and analyzes the smoothness of the frequency response curve to detect whether the curve has a sudden change or irregular fluctuation. Based on the frequency response consistency score and smoothness score of the left and right channels of the headset, the frequency response stability score of the left and right channel bone conduction is calculated by weighted comprehensive calculation;

[0130] A feedback sound wave conduction quality assessment module, which detects the amplitude change of the feedback signal relative to the original audio signal according to the basic acoustic characteristics of the quantified earphone during the conduction process, assesses the energy attenuation in the conduction path, analyzes the distortion of the feedback sound wave, integrates and compares the waveform of the feedback signal with that of the original signal to quantify the distortion, and calculates the feedback quality score through a weighted comprehensive score;

[0131] The conduction quality status judgment module calculates the comprehensive conduction quality status scores of the left and right headphones based on the conduction synchronization correlation score, frequency response stability score, and feedback quality score of the left and right channel audio signals of the headphones between the headphones and the skull, and judges the current conduction quality status of the left and right headphones based on the scoring results.

[0132] Furthermore, the present solution also proposes a storage medium for a method for detecting and evaluating the usage status of a Bluetooth headset, on which a computer-readable program is stored. When the computer-readable program is called, the above-mentioned method for detecting and evaluating the usage status of a Bluetooth headset is executed.

[0133] It is understandable that the storage medium may be a magnetic medium, such as a floppy disk, a hard disk, or a magnetic tape; an optical medium, such as a DVD; or a semiconductor medium, such as a solid state drive (SSD).

[0134] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions only describe the principles of the present invention. The present invention may be subject to various changes and improvements without departing from the spirit and scope of the present invention. These changes and improvements fall within the scope of the present invention. The scope of protection claimed by the present invention is defined by the attached claims and their equivalents.

Claims

1. A method for detecting and evaluating the use status of a Bluetooth headset, characterized in that: include: Analyze the bone conduction acoustic impedance characteristics during audio conduction and evaluate the audio conduction balance of the left and right channels of the headphones at different frequencies; Analyze the correlation between the bone conduction vibration frequency of the headphones and the conductivity of the skull at different frequencies, and evaluate the conduction synchronization of the audio signal between the headphones and the skull; The frequency response stability of bone conduction is comprehensively evaluated through multi-band frequency response characteristics, response consistency score and smoothness score; Analyze the user's bone feedback sound waves, detect signal attenuation and distortion in the conduction path, and evaluate the quality of the feedback sound waves; The conduction quality status of the Bluetooth headset when in use is comprehensively evaluated by comprehensively analyzing the conduction synchronization of the audio signal between the headset and the skull, the frequency response stability of bone conduction, and the quality of the feedback sound waves.

2. A method for detecting and evaluating the use status of a Bluetooth headset according to claim 1, characterized in that: The analysis of the bone conduction acoustic impedance characteristics during the audio conduction process and the evaluation of the audio conduction balance state of the left and right channels of the earphone at different frequencies specifically include: Measure the comprehensive equivalent impedance value of the left and right channels of the headphones at different bone conduction frequencies; Analyze the relative impedance matching of each frequency of the left and right channels, calculate the vibration conduction efficiency of each frequency of the left and right channels respectively, and quantify the actual vibration conduction effect of the audio signal at different frequencies. The vibration conduction efficiency calculation formula is: Where η(f) represents the vibration transmission efficiency at frequency f, which is used to reflect the actual impedance Z(f) compared with the preset ideal impedance Z opt The relative impedance matching degree; Based on the calculation results of the conduction efficiency at multiple frequencies, the impedance matching curves of the left and right channels are drawn to depict the conduction performance of the left and right channels of the headphones in the entire frequency spectrum. Compare the impedance matching curve characteristics of the left and right channels, calculate the cumulative conduction efficiency deviation distribution symmetry score, and evaluate the difference in conduction performance between the left and right headphones. The calculation expression for the cumulative conduction efficiency deviation distribution symmetry score is: Where D f is the cumulative conduction efficiency deviation distribution symmetry score, f min 、f max are the minimum and maximum frequencies of the impedance matching curve interval, η left (f) and η right (f) represents the vibration conduction efficiency of the left and right channels of the earphone at frequency f respectively; A qualified symmetry score value is set. When the cumulative conduction efficiency deviation distribution symmetry score is less than the qualified symmetry score value, the left and right channels of the earphone are marked as being in a conduction unbalanced state.

3. The method for detecting and evaluating the use status of a Bluetooth headset according to claim 2, characterized in that: The analyzing the correlation between the bone conduction vibration frequency of the earphone at different frequencies and the conductivity of the skull and evaluating the conduction synchronization of the audio signal between the earphone and the skull specifically includes: Set the monitoring time window and set the preset frequency points with uniform frequency growth within the time window; Sequentially measure the bone conduction vibration frequency of the left and right channels of the earphones at each frequency point and the conductivity of the skull at the preset frequency points in the monitoring time window; Among them, the conductivity of the skull is comprehensively evaluated by the amplitude of the input signal entering the bone and the amplitude of the output signal leaving the bone, combined with the conductivity constant of the bone characteristics; After obtaining the bone conduction vibration frequency and conductivity, the correlation between the bone conduction vibration frequency and skull conductivity was determined by calculating the synchronization correlation score; The calculation formula for synchronization relevance score is: In the formula, R sync Score the synchronization correlation, f vib (f i )、C(f i ) are the frequencies f i The bone conduction vibration frequency and the quantified value of skull conductivity under are the mean values ​​of vibration frequency and conductivity quantization value, f i is the input frequency corresponding to the th preset frequency point, and n is the total number of preset frequency points set within the set monitoring time window; The system performs synchronization analysis on the frequencies of the left and right channels of the headphones respectively, and obtains synchronization correlation scores corresponding to the left and right channels of the headphones.

4. The method for detecting and evaluating the use status of a Bluetooth headset according to claim 3, characterized in that: The comprehensive evaluation of the frequency response stability of bone conduction through multi-band frequency response characteristics, response consistency score and smoothness score specifically includes: Obtain different frequency points within the set monitoring time window for frequency band division; Obtaining the average bone conduction vibration frequency of each divided frequency band, and the average amplitude corresponding to the bone conduction vibration frequency band; The frequency response value of each divided frequency band is obtained by multiplying the average vibration amplitude and phase angle of the frequency band to describe the response characteristics of the earphone in a specific frequency band; The system calculates the degree to which the response values ​​of different divided frequency bands deviate from the average response and quantifies the results into a consistency score; Analyze the smoothness of the frequency response curve. The system calculates the rate of change of adjacent frequency response values ​​to detect whether there are sudden changes or irregular fluctuations in the curve. Based on the frequency response consistency score and smoothness score of the left and right channels of the headphones, the frequency response stability score of the left and right channel bone conduction is calculated through weighted comprehensive calculation to evaluate the frequency response stability of bone conduction.

5. A method for detecting and evaluating the use status of a Bluetooth headset according to claim 4, characterized in that: The analyzing of the user's bone feedback sound waves, detecting the signal attenuation and distortion in the conduction path, and evaluating the quality of the feedback sound waves specifically include: Collect the feedback sound wave signal after the earphone is transmitted to the skull; Comprehensively quantify the basic acoustic characteristics of the earphone during the conduction process based on the frequency, amplitude and waveform of the feedback sound wave; Detect the amplitude change of the feedback signal relative to the original audio signal and evaluate the energy attenuation in the conduction path; After the signal attenuation analysis, the distortion of the feedback sound wave is further analyzed, and the feedback signal is integrated and compared with the waveform of the original signal to quantify the distortion and identify the distortion in the conduction path; The attenuation ratio and distortion of the feedback sound wave signals of the left and right channels of the headphones are obtained, and the feedback quality score is calculated through a weighted comprehensive score to evaluate the overall feedback quality of the left and right channels of the headphones in different frequency bands.

6. A method for detecting and evaluating the use status of a Bluetooth headset according to claim 5, characterized in that: The comprehensive analysis of the conduction synchronization of the audio signal between the headset and the skull, the frequency response stability of bone conduction, the quality of the feedback sound wave, and the comprehensive evaluation and judgment of the conduction quality state of the Bluetooth headset when in use specifically includes: When the left and right channels of the earphone are in a conduction unbalanced state, the conduction synchronization correlation score, frequency response stability score, and feedback quality score of the left and right channel audio signals of the earphone between the earphone and the skull are obtained respectively; Based on the conduction synchronization correlation score, frequency response stability score, and feedback quality score of the left and right channel audio signals between the earphones and the skull, the comprehensive conduction quality status scores of the left and right earphones are calculated respectively. The conduction quality status score calculation method is: Where M is the conduction quality status score, R sta , R rec They are the frequency response stability score and feedback quality score, α1 and α2 are R sta , R rec The weight coefficient of Setting a conduction quality status score standard value, comparing the conduction quality status scores of the left and right earphones with the conduction quality status score standard value respectively, marking the earphones that do not reach the standard value as having a poor conduction quality status, and marking the earphones that reach the standard value as having a qualified conduction quality status; The conduction quality status of the earphone is synchronized to the user terminal for real-time conduction quality status monitoring.

7. A detection and evaluation system for the use status of a Bluetooth headset, used to implement the detection and evaluation method for the use status of a Bluetooth headset as claimed in any one of claims 1 to 6, characterized in that: include: A conduction balance state judgment module, wherein the conduction balance state judgment module analyzes the relative impedance matching degree of each frequency of the left and right channels, calculates the vibration conduction efficiency of each frequency of the left and right channels respectively, quantifies the actual vibration conduction effect of the audio signal at different frequencies, compares the impedance matching curve characteristics of the left and right channels, calculates the cumulative conduction efficiency deviation distribution symmetry score, evaluates the conduction performance difference between the left and right headphones, and judges whether the left and right channels of the headphones are in a conduction unbalanced state based on the cumulative conduction efficiency deviation distribution symmetry score; A conduction synchronization evaluation module, which sequentially measures the bone conduction vibration frequency of the left and right channels of the earphones at each frequency point and the conductivity of the skull at preset frequency points, calculates a synchronization correlation score, and determines the correlation between the bone conduction vibration frequency and the conductivity of the skull; A frequency response stability evaluation module, which calculates the degree to which the response values ​​of different divided frequency bands deviate from the average response, quantifies the result into a consistency score, and analyzes the smoothness of the frequency response curve to detect whether the curve has a sudden change or irregular fluctuation. Based on the frequency response consistency score and smoothness score of the left and right channels of the headset, the frequency response stability score of the left and right channel bone conduction is calculated by weighted comprehensive calculation; A feedback sound wave conduction quality assessment module, which detects the amplitude change of the feedback signal relative to the original audio signal according to the basic acoustic characteristics of the quantified earphone during the conduction process, assesses the energy attenuation in the conduction path, analyzes the distortion of the feedback sound wave, integrates and compares the waveform of the feedback signal with that of the original signal to quantify the distortion, and calculates the feedback quality score through a weighted comprehensive score; The conduction quality status judgment module calculates the comprehensive conduction quality status scores of the left and right headphones based on the conduction synchronization correlation score, frequency response stability score, and feedback quality score of the left and right channel audio signals of the headphones between the headphones and the skull, and judges the current conduction quality status of the left and right headphones based on the scoring results.

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