An intelligent analysis system for noise reduction effect of noise reduction headphones based on test data

Abstract

The present invention relates to the technical field of intelligent analysis of noise reduction effects of noise reduction headphones, and specifically discloses an intelligent analysis system for noise reduction effects of noise reduction headphones based on test data, the system comprising: a noise reduction headphone sound state analysis module, a cloud database, a noise reduction headphone environmental adaptability analysis module, a non-noise reduction headphone sound comparison analysis module and a comprehensive noise reduction analysis feedback module; the present invention analyzes the comprehensive noise reduction index of the noise reduction headphones in the current production batch by analyzing the noise reduction adaptability of the noise reduction headphones in the current production batch corresponding to the noise environment level and the noise reduction difference between the noise reduction headphones and the non-noise reduction headphones, thereby analyzing the comprehensive noise reduction index of the noise reduction headphones in the current production batch and providing feedback, thereby intuitively demonstrating the noise reduction effect of the noise reduction headphones, realizing multi-dimensional analysis of the noise reduction effect of the noise reduction headphones, improving the persuasiveness of the comprehensive noise reduction index analysis of the noise reduction headphones, and simultaneously improving the user experience and satisfaction with the noise reduction headphones.

Description

Technical Field

[0001] The present invention relates to the technical field of intelligent analysis of noise reduction effects of noise reduction headphones, and in particular to an intelligent analysis system of noise reduction effects of noise reduction headphones based on test data. Background Art

[0002] With the continuous development of science and technology, noise-canceling headphones have become a common device in people's daily lives. However, existing noise-canceling headphones have certain problems in terms of noise-canceling effects, such as unstable noise-canceling effects and poor adaptability to different noises. In addition, existing noise-canceling effect evaluation methods are mostly based on manual testing, which is inefficient and low in accuracy. Therefore, in order to improve the user experience, it is necessary to conduct intelligent analysis of the noise-canceling effect of noise-canceling headphones.

[0003] The existing intelligent analysis method for the noise reduction effect of noise reduction headphones still has the following problems: 1. Currently, the noise reduction effect of noise reduction headphones is only analyzed in a single noise environment, and the noise reduction effect of noise reduction headphones in different noise environments is not analyzed, which reduces the accuracy and rationality of the noise reduction adaptability analysis of noise reduction headphones corresponding to the noise environment level, cannot help manufacturers better understand the performance of noise reduction headphones, cannot promptly discover the shortcomings of noise reduction headphones in certain specific environments, and thus cannot provide a basis for further improvement of the product.

[0004] 2. Failure to compare and analyze the noise-canceling effects of noise-canceling headphones and non-noise-canceling headphones in different noise environments makes it impossible to fully understand the advantages and disadvantages of the noise-canceling effect, and it is also impossible to better evaluate the performance of noise-canceling headphones. The lack of comparative data with non-noise-canceling headphones may cause users to have doubts about the performance and effects of noise-canceling headphones, thus affecting their choice. Summary of the invention

[0005] In view of this, in order to solve the problems raised in the above background technology, an intelligent analysis system for noise reduction effect of noise reduction headphones based on test data is proposed.

[0006] The objective of the present invention can be achieved through the following technical scheme: The present invention provides a noise reduction effect intelligent analysis system of noise reduction headphones based on test data, comprising: a noise reduction headphone sound state analysis module, which is used to randomly select a number of noise reduction headphones from the current production batch of a target production factory, and divide them into noise environment test groups in equal proportion, perform noise reduction simulation tests on the noise reduction headphones in each noise environment test group, collect the loudness corresponding to the simulated noise in each noise environment test group, and collect the loudness, timbre and signal-to-noise ratio of the sound received by each noise reduction headphone in each noise environment test group during the corresponding noise reduction simulation test, and analyze the comprehensive noise reduction effect evaluation index corresponding to the noise reduction headphones in each noise environment test group.

[0007] The cloud database is used to store a set of waveform graphs corresponding to each timbre and store abnormal timbre of the noise reduction headphones.

[0008] The noise-cancelling headphone environmental adaptability analysis module is used to analyze the noise-cancelling adaptability of the noise-cancelling headphones of the current production batch at the corresponding noise environment level.

[0009] The non-noise-cancelling headphone sound comparison and analysis module is used to place the same number of non-noise-cancelling headphones in each noise environment test group, collect the loudness, timbre and signal-to-noise ratio of the sound received by each non-noise-cancelling headphone in each noise environment test group during the corresponding noise reduction simulation test, and analyze the comprehensive noise reduction effect evaluation index corresponding to the non-noise-cancelling headphones in each noise environment test group according to the analysis method of the comprehensive noise reduction effect evaluation index corresponding to the noise reduction headphones in each noise environment test group, and analyze the noise reduction difference degree ψ between the noise-cancelling headphones and the non-noise-cancelling headphones in the current production batch.

[0010] Comprehensive noise reduction analysis feedback module, used to analyze the comprehensive noise reduction index of noise reduction headphones in the current production batch And when it is less than the set reference comprehensive noise reduction index, it indicates that the noise reduction effect of the noise reduction headphones in the current production batch is unqualified, and feedback is given.

[0011] Specifically, the comprehensive noise reduction effect evaluation index corresponding to the noise reduction headphones in each noise environment test group is analyzed, and the specific analysis process is as follows: A1, based on the loudness, timbre and signal-to-noise ratio of the sound received by each noise reduction headphone in each noise environment test group during the corresponding noise reduction simulation test, the noise reduction effect evaluation index β corresponding to each noise reduction headphone in each noise environment test group is calculated ij , where i represents the number of the noise environment test group, i=1,2,...,n, and j represents the number of the noise reduction headphone, j=1,2,...,m.

[0012] A2. Compare the noise reduction effect evaluation index corresponding to each noise reduction headset in each noise environment test group with the set reference noise reduction effect evaluation index. If the noise reduction effect evaluation index corresponding to a noise reduction headset in a noise environment test group is greater than or equal to the set reference noise reduction effect evaluation index, then the noise reduction headset is recorded as a normal noise reduction headset. Count the number of normal noise reduction headsets in each noise environment test group, recorded as χ i .

[0013] A3. Calculate the comprehensive noise reduction effect evaluation index δ corresponding to the noise reduction headphones in each noise environment test group i , Among them, β′ and σ1 represent the set reference noise reduction effect evaluation index and the proportion of normal noise reduction headphones respectively, a1 and a2 represent the set noise reduction effect evaluation index and the proportion of normal noise reduction headphones corresponding to the weight of the comprehensive noise reduction effect evaluation respectively, and m represents the number of noise reduction headphones.

[0014] Specifically, the noise reduction effect evaluation index corresponding to each noise reduction headset in each noise environment test group is calculated, and the specific calculation process is as follows: B1, the loudness of the sound received by each noise reduction headset in each noise environment test group during the corresponding noise reduction simulation test is recorded as ε ij .

[0015] B2. Record the loudness of the simulated noise in each noise environment test group as

[0016] B3. Calculate the loudness reduction index ρ of each noise reduction headset in each noise environment test group when receiving sound ij , Here, Δε represents a loudness reduction value for a set reference.

[0017] B4. Based on the timbre and signal-to-noise ratio of the sound received by each noise cancelling headset in each noise environment test group during the corresponding noise reduction simulation test, calculate the sound quality evaluation index ω corresponding to each noise cancelling headset in each noise environment test group when receiving sound ij .

[0018] B5. Calculate the noise reduction effect evaluation index β corresponding to each noise reduction headset in each noise environment test group ij , Among them, a3 and a4 respectively represent the weights of the noise reduction effect evaluation corresponding to the set loudness reduction index and sound quality evaluation index.

[0019] Specifically, the sound quality evaluation index corresponding to each noise reduction headset in each noise environment test group when receiving sound is calculated, and the specific calculation process is: C1, based on the timbre of the sound received by each noise reduction headset in each noise environment test group during the corresponding noise reduction simulation test, calculate the timbre compliance coefficient ζ corresponding to each noise reduction headset in each noise environment test group when receiving sound ij .

[0020] C2. The signal-to-noise ratio of the sound received by each noise reduction headset in each noise environment test group during the corresponding noise reduction simulation test is recorded as μ ij .

[0021] C3. Calculate the sound quality evaluation index ω corresponding to each noise reduction headset in each noise environment test group when receiving sound ij , Among them, ζ′ and μ′ represent the set reference timbre conformity coefficient and signal-to-noise ratio respectively, and a5 and a6 represent the set timbre conformity coefficient and signal-to-noise ratio corresponding to the sound quality evaluation weights respectively.

[0022] Specifically, the noise reduction adaptability of the noise reduction headphones of the current production batch corresponding to the noise environment level is analyzed, and the specific analysis process is: D1. Compare the comprehensive noise reduction effect evaluation index corresponding to the noise reduction headphones in each noise environment test group with the set reference comprehensive noise reduction effect evaluation index.

[0023] D2. If the comprehensive noise reduction effect evaluation index corresponding to the noise reduction headphones in each noise environment test group is greater than the set reference comprehensive noise reduction effect evaluation index, the noise reduction adaptability of the noise reduction headphones in the current production batch corresponding to the noise environment level is recorded as

[0024] D3. If the comprehensive noise reduction effect evaluation index of the noise reduction headphones in a certain noise environment test group is less than the set reference comprehensive noise reduction effect evaluation index, then the noise reduction adaptability of the noise reduction headphones in the current production batch corresponding to the noise environment level is set.

[0025] D4. If the comprehensive noise reduction effect evaluation index corresponding to the noise reduction headphones in each noise environment test group is less than the set reference comprehensive noise reduction effect evaluation index, the noise reduction adaptability of the noise reduction headphones in the current production batch corresponding to the noise environment level is recorded as

[0026] D5. In summary, we get the noise reduction adaptability ξ of the current production batch of noise reduction headphones corresponding to the noise environment level, where the value of ξ is or or

[0027] Specifically, the noise reduction difference between the noise cancelling headphones and the non-noise cancelling headphones in the current production batch is analyzed, and the specific analysis process is: E1. Subtract the comprehensive noise reduction effect evaluation index corresponding to the noise cancelling headphones in each noise environment test group from the comprehensive noise reduction effect evaluation index corresponding to the non-noise cancelling headphones in each noise environment test group to obtain the comprehensive noise reduction effect deviation between the noise cancelling headphones and the non-noise cancelling headphones in each noise environment test group.

[0028] E2. With the noise environment test group as the horizontal axis and the comprehensive noise reduction effect deviation as the vertical axis, a comprehensive noise reduction effect deviation curve between the noise reduction headphones and the non-noise reduction headphones is constructed, and the slope value is located from the curve as the growth rate of the comprehensive noise reduction effect deviation between the noise reduction headphones and the non-noise reduction headphones, which is marked as K.

[0029] E3. Set the influencing factor λ of the deviation growth rate of the comprehensive noise reduction effect between the noise reduction headphones and the non-noise reduction headphones.

[0030] E4. Calculate the noise reduction difference between the noise reduction headphones and non-noise reduction headphones in the current production batch, Wherein, K′ represents the deviation growth rate of the comprehensive noise reduction effect of the set reference.

[0031] Specifically, the influencing factor of the deviation growth rate of the comprehensive noise reduction effect between the noise reduction headphones and the non-noise reduction headphones is set, and the specific setting process is as follows: F1, taking the set reference comprehensive noise reduction effect deviation growth rate as the slope, constructing a reference baseline in the comprehensive noise reduction effect deviation curve between the noise reduction headphones and the non-noise reduction headphones, and locating the number of noise environment test groups below the reference baseline from the comprehensive noise reduction effect deviation curve between the noise reduction headphones and the non-noise reduction headphones, and locating it as the number of deviation noise environment test groups, recorded as

[0032] F2. Locate the maximum and minimum values ​​of the comprehensive noise reduction effect deviation from the comprehensive noise reduction effect deviation curve between the noise reduction earphone and the non-noise reduction earphone, and record them as ΔH respectively. max and ΔH min .

[0033] F3, set the comprehensive noise reduction effect deviation growth rate influencing factor λ between noise reduction headphones and non-noise reduction headphones, in, and ΔH′ represent the number of reference deviation noise environment test groups and the deviation extreme value difference of the comprehensive noise reduction effect respectively. a7 and a8 represent the weight of the evaluation proportion of the influencing factor of the deviation growth rate of the comprehensive noise reduction effect corresponding to the number of deviation noise environment test groups and the deviation extreme value difference of the comprehensive noise reduction effect respectively. e represents a natural constant.

[0034] Specifically, the calculation formula for the comprehensive noise reduction index of the noise reduction headphones in the current production batch is: Among them, b1 and b2 represent the weights of the set noise reduction adaptability and noise reduction difference corresponding to the comprehensive noise reduction evaluation respectively.

[0035] Compared with the prior art, the embodiments of the present invention have at least the following advantages or beneficial effects: (1) The present invention analyzes the comprehensive noise reduction index of the noise reduction headphones in the current production batch by analyzing the noise reduction adaptability of the noise reduction headphones in the current production batch corresponding to the noise environment level and the noise reduction difference between the noise reduction headphones and non-noise reduction headphones, and provides feedback, thereby intuitively demonstrating the noise reduction effect of the noise reduction headphones, realizing a multi-dimensional analysis of the noise reduction effect of the noise reduction headphones, improving the persuasiveness of the comprehensive noise reduction index analysis of the noise reduction headphones, and at the same time improving the user experience and satisfaction with the noise reduction headphones.

[0036] (2) The present invention analyzes the comprehensive noise reduction effect evaluation index corresponding to the noise reduction headphones in each noise environment test group by combining the loudness, timbre and signal-to-noise ratio of the sound received by each noise reduction headphone, thereby analyzing the noise reduction adaptability of the noise reduction headphone corresponding to the noise environment level, thereby improving the accuracy and rationality of the noise reduction adaptability analysis of the noise reduction headphone corresponding to the noise environment level. By analyzing the noise reduction effects in different environments, it can help manufacturers better understand the performance of noise reduction headphones, and can promptly discover the shortcomings of noise reduction headphones in certain specific environments, thereby providing a basis for further improvement of the product.

[0037] (3) The present invention analyzes the noise reduction difference between noise reducing headphones and non-noise reducing headphones by combining the comprehensive noise reducing effect evaluation index corresponding to the non-noise reducing headphones in each noise environment test group, so as to fully understand the advantages and disadvantages of the noise reducing effect and better evaluate the performance of the noise reducing headphones. At the same time, by comparing the data with the non-noise reducing headphones, it is possible to avoid users' doubts about the performance and effect of the noise reducing headphones, thereby helping them to better choose suitable noise reducing headphones. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0039] Figure 1 It is a schematic diagram of the system module structure connection of the present invention. DETAILED DESCRIPTION

[0040] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0041] See also Figure 1 As shown, the present invention provides an intelligent analysis system for noise reduction effect of noise reduction headphones based on test data, including: a noise reduction headphone sound state analysis module, a cloud database, a noise reduction headphone environmental adaptability analysis module, a non-noise reduction headphone sound comparison analysis module and a comprehensive noise reduction analysis feedback module.

[0042] The noise reduction headset sound state analysis module is connected to the noise reduction headset environment adaptability analysis module, the noise reduction headset sound state analysis module is connected to the non-noise reduction headset sound comparison analysis module, both the noise reduction headset environment adaptability analysis module and the non-noise reduction headset sound comparison analysis module are connected to the comprehensive noise reduction analysis feedback module, and the noise reduction headset sound state analysis module is connected to the cloud database.

[0043] The noise-cancelling headphone sound state analysis module is used to randomly select a number of noise-cancelling headphones from the current production batch of the target production plant, and divide them into noise environment test groups in equal proportion, perform noise reduction simulation tests on the noise-cancelling headphones in each noise environment test group, collect the loudness corresponding to the simulated noise in each noise environment test group, and collect the loudness, timbre and signal-to-noise ratio of the sound received by each noise-cancelling headphone in each noise environment test group during the corresponding noise reduction simulation test, and analyze the comprehensive noise reduction effect evaluation index corresponding to the noise-cancelling headphones in each noise environment test group.

[0044] In a specific embodiment of the present invention, the noise environments include but are not limited to traffic noise environment, human voice noise environment and wind noise environment.

[0045] It should be noted that the specific method of the noise reduction simulation test is: the noise reduction headphones in each noise environment test group are placed in a corresponding enclosed space at the same time, and the noise of the corresponding noise environment is input to the noise reduction headphones in each noise environment test group through an external sound device.

[0046] It should also be noted that the loudness corresponding to the noise simulated in each noise environment test group is extracted from an external sound device, and the loudness and signal-to-noise ratio of the sound received by each noise cancelling headset during the corresponding noise reduction simulation test of each noise environment test group are collected by a sound sensor placed inside the noise cancelling headset and a spectrometer connected to the noise cancelling headset.

[0047] It should also be noted that the method for collecting the timbre of the sound received by each noise cancelling earphone during the corresponding noise reduction simulation test of each noise environment test group is as follows: the waveform of the sound received by each noise cancelling earphone is collected by a sound sensor placed inside the noise cancelling earphone, a waveform set corresponding to each timbre is extracted from the cloud database, and the waveform of the sound received by each noise cancelling earphone is matched and compared with the waveform set corresponding to each timbre through audio analysis software. If the waveform of the sound received by a certain noise cancelling earphone is within the waveform set corresponding to a certain timbre, then the timbre is used as the timbre of the sound received by the noise cancelling earphone, thereby obtaining the timbre of the sound received by each noise cancelling earphone in the corresponding noise reduction simulation test of each noise environment test group.

[0048] In a specific embodiment of the present invention, the comprehensive noise reduction effect evaluation index corresponding to the noise reduction headphones in each noise environment test group is analyzed, and the specific analysis process is as follows: A1, based on the loudness, timbre and signal-to-noise ratio of the sound received by each noise reduction headphone in each noise environment test group during the corresponding noise reduction simulation test, the noise reduction effect evaluation index β corresponding to each noise reduction headphone in each noise environment test group is calculated ij , where i represents the number of the noise environment test group, i=1,2,...,n, and j represents the number of the noise reduction headphone, j=1,2,...,m.

[0049] In a specific embodiment of the present invention, the noise reduction effect evaluation index corresponding to each noise reduction headset in each noise environment test group is calculated, and the specific calculation process is as follows: B1, the loudness of the sound received by each noise reduction headset in each noise environment test group during the corresponding noise reduction simulation test is recorded as ε ij .

[0050] B2. Record the loudness of the simulated noise in each noise environment test group as

[0051] B3. Calculate the loudness reduction index ρ of each noise reduction headset in each noise environment test group when receiving sound ij , Here, Δε represents a loudness reduction value for a set reference.

[0052] B4. Based on the timbre and signal-to-noise ratio of the sound received by each noise cancelling headset in each noise environment test group during the corresponding noise reduction simulation test, calculate the sound quality evaluation index ω corresponding to each noise cancelling headset in each noise environment test group when receiving sound ij .

[0053] In a specific embodiment of the present invention, the sound quality evaluation index corresponding to each noise reduction headset in each noise environment test group when receiving sound is calculated, and the specific calculation process is: C1, based on the timbre of the sound received by each noise reduction headset in each noise environment test group during the corresponding noise reduction simulation test, calculate the timbre compliance coefficient ζ corresponding to each noise reduction headset in each noise environment test group when receiving sound ij .

[0054] It should be noted that the specific method of calculating the timbre compliance coefficient corresponding to each noise-cancelling headset in each noise environment test group when receiving sound is as follows: the timbre of the sound received by each noise-cancelling headset in each noise environment test group during the corresponding noise reduction simulation test is matched and compared with the abnormal timbre of the noise-cancelling headset stored in the cloud database; if the timbre of the sound received by a certain noise-cancelling headset matches the abnormal timbre of the noise-cancelling headset successfully, the timbre compliance coefficient corresponding to the noise-cancelling headset when receiving sound is recorded as θ′1; otherwise, the timbre compliance coefficient corresponding to the noise-cancelling headset when receiving sound is recorded as θ′2, thereby obtaining the timbre compliance coefficient ζ corresponding to each noise-cancelling headset in each noise environment test group when receiving sound. ij , where ζ ij The value is θ′1 or θ′2, θ′1<θ′2.

[0055] It should be noted that, in a specific embodiment of the present invention, the value of θ′2 is 1, and the value of θ′1 is 0.

[0056] C2. The signal-to-noise ratio of the sound received by each noise reduction headset in each noise environment test group during the corresponding noise reduction simulation test is recorded as μ ij .

[0057] C3. Calculate the sound quality evaluation index ω corresponding to each noise reduction headset in each noise environment test group when receiving sound ij , Among them, ζ′ and μ′ represent the set reference timbre conformity coefficient and signal-to-noise ratio respectively, and a5 and a6 represent the set timbre conformity coefficient and signal-to-noise ratio corresponding to the sound quality evaluation weights respectively.

[0058] B5. Calculate the noise reduction effect evaluation index β corresponding to each noise reduction headset in each noise environment test group ij , Among them, a3 and a4 respectively represent the weights of the noise reduction effect evaluation corresponding to the set loudness reduction index and sound quality evaluation index.

[0059] A2. Compare the noise reduction effect evaluation index corresponding to each noise reduction headset in each noise environment test group with the set reference noise reduction effect evaluation index. If the noise reduction effect evaluation index corresponding to a noise reduction headset in a noise environment test group is greater than or equal to the set reference noise reduction effect evaluation index, then the noise reduction headset is recorded as a normal noise reduction headset. Count the number of normal noise reduction headsets in each noise environment test group, recorded as χ i .

[0060] A3. Calculate the comprehensive noise reduction effect evaluation index δ corresponding to the noise reduction headphones in each noise environment test group i , Among them, β′ and σ1 represent the set reference noise reduction effect evaluation index and the proportion of normal noise reduction headphones respectively, a1 and a2 represent the set noise reduction effect evaluation index and the proportion of normal noise reduction headphones corresponding to the weight of the comprehensive noise reduction effect evaluation respectively, and m represents the number of noise reduction headphones.

[0061] The cloud database is used to store a set of waveform diagrams corresponding to each timbre and store abnormal timbre of the noise reduction headset.

[0062] The noise reduction headphone environmental adaptability analysis module is used to analyze the noise reduction adaptability ξ of the noise reduction headphone of the current production batch corresponding to the noise environment level.

[0063] In a specific embodiment of the present invention, the noise reduction adaptability of the noise reduction headphones of the current production batch corresponding to the noise environment level is analyzed, and the specific analysis process is: D1. Compare the comprehensive noise reduction effect evaluation index corresponding to the noise reduction headphones in each noise environment test group with the set reference comprehensive noise reduction effect evaluation index.

[0064] D2. If the comprehensive noise reduction effect evaluation index corresponding to the noise reduction headphones in each noise environment test group is greater than the set reference comprehensive noise reduction effect evaluation index, the noise reduction adaptability of the noise reduction headphones in the current production batch corresponding to the noise environment level is recorded as

[0065] D3. If the comprehensive noise reduction effect evaluation index of the noise reduction headphones in a certain noise environment test group is less than the set reference comprehensive noise reduction effect evaluation index, then the noise reduction adaptability of the noise reduction headphones in the current production batch corresponding to the noise environment level is set.

[0066] It should be noted that the specific process of setting the noise reduction adaptability of the noise reduction headphones of the current production batch corresponding to the noise environment level is: G1. Count the number of noise environment test groups whose comprehensive noise reduction effect evaluation index is less than the set reference comprehensive noise reduction effect evaluation index, and record it as the number of abnormal noise environment test groups τ.

[0067] G2. Extract the minimum value from the comprehensive noise reduction effect evaluation index corresponding to the noise reduction headphones in each abnormal noise environment test group, and record it as φ.

[0068] G3. Set the noise reduction adaptability of the current production batch of noise reduction headphones to the corresponding noise environment level Among them, τ′ and φ′ represent the number of abnormal noise environment test groups and the comprehensive noise reduction effect evaluation index set as reference, respectively; b3 and b4 represent the weights of the noise reduction adaptability evaluation corresponding to the number of abnormal noise environment test groups and the comprehensive noise reduction effect evaluation index set, respectively.

[0069] D4. If the comprehensive noise reduction effect evaluation index corresponding to the noise reduction headphones in each noise environment test group is less than the set reference comprehensive noise reduction effect evaluation index, the noise reduction adaptability of the noise reduction headphones in the current production batch corresponding to the noise environment level is recorded as

[0070] D5. In summary, we get the noise reduction adaptability ξ of the current production batch of noise reduction headphones corresponding to the noise environment level, where the value of ξ is or or

[0071] It should be noted that, in a specific embodiment of the present invention, The value of is 1. The value of is 0.

[0072] The embodiment of the present invention analyzes the comprehensive noise reduction effect evaluation index corresponding to the noise reduction headphones in each noise environment test group by combining the loudness, timbre and signal-to-noise ratio of the sound received by each noise reduction headphones, thereby analyzing the noise reduction adaptability of the noise reduction headphones corresponding to the noise environment level, thereby improving the accuracy and rationality of the noise reduction adaptability analysis of the noise reduction headphones corresponding to the noise environment level. By analyzing the noise reduction effects in different environments, it can help manufacturers to better understand the performance of the noise reduction headphones, and can promptly discover the shortcomings of the noise reduction headphones in certain specific environments, thereby providing a basis for further improvement of the product.

[0073] The non-noise-cancelling headphone sound comparison and analysis module is used to place the same number of non-noise-cancelling headphones in each noise environment test group, collect the loudness, timbre and signal-to-noise ratio of the sound received by each non-noise-cancelling headphone in each noise environment test group during the corresponding noise reduction simulation test, and analyze the comprehensive noise reduction effect evaluation index corresponding to the non-noise-cancelling headphones in each noise environment test group according to the analysis method of the comprehensive noise reduction effect evaluation index corresponding to the noise reduction headphones in each noise environment test group, and analyze the noise reduction difference degree ψ between the noise reduction headphones and the non-noise reduction headphones in the current production batch.

[0074] In a specific embodiment of the present invention, the noise reduction difference between the noise cancelling headphones and the non-noise cancelling headphones in the current production batch is analyzed, and the specific analysis process is: E1. Subtract the comprehensive noise reduction effect evaluation index corresponding to the noise cancelling headphones in each noise environment test group from the comprehensive noise reduction effect evaluation index corresponding to the non-noise cancelling headphones in each noise environment test group to obtain the comprehensive noise reduction effect deviation between the noise cancelling headphones and the non-noise cancelling headphones in each noise environment test group.

[0075] E2. With the noise environment test group as the horizontal axis and the comprehensive noise reduction effect deviation as the vertical axis, a comprehensive noise reduction effect deviation curve between the noise reduction headphones and the non-noise reduction headphones is constructed, and the slope value is located from the curve as the growth rate of the comprehensive noise reduction effect deviation between the noise reduction headphones and the non-noise reduction headphones, which is marked as K.

[0076] E3. Set the influencing factor λ of the deviation growth rate of the comprehensive noise reduction effect between the noise reduction headphones and the non-noise reduction headphones.

[0077] In a specific embodiment of the present invention, the influencing factor of the deviation growth rate of the comprehensive noise reduction effect between the noise reduction headphones and the non-noise reduction headphones is set, and the specific setting process is: F1, taking the reference comprehensive noise reduction effect deviation growth rate as the slope, constructing a reference baseline in the comprehensive noise reduction effect deviation curve between the noise reduction headphones and the non-noise reduction headphones, and locating the number of noise environment test groups below the reference baseline from the comprehensive noise reduction effect deviation curve between the noise reduction headphones and the non-noise reduction headphones, and using it as the deviation noise environment test group number, recorded as

[0078] F2. Locate the maximum and minimum values ​​of the comprehensive noise reduction effect deviation from the comprehensive noise reduction effect deviation curve between the noise reduction earphone and the non-noise reduction earphone, and record them as ΔH respectively. max and ΔH min .

[0079] F3, set the comprehensive noise reduction effect deviation growth rate influencing factor λ between noise reduction headphones and non-noise reduction headphones, in, and ΔH′ represent the number of reference deviation noise environment test groups and the deviation extreme value difference of the comprehensive noise reduction effect respectively. a7 and a8 represent the weight of the evaluation proportion of the influencing factor of the deviation growth rate of the comprehensive noise reduction effect corresponding to the number of deviation noise environment test groups and the deviation extreme value difference of the comprehensive noise reduction effect respectively. e represents a natural constant.

[0080] E4. Calculate the noise reduction difference between the noise reduction headphones and non-noise reduction headphones in the current production batch, Wherein, K′ represents the deviation growth rate of the comprehensive noise reduction effect of the set reference.

[0081] The embodiment of the present invention analyzes the noise reduction difference between the noise reducing headphones and the non-noise reducing headphones by combining the comprehensive noise reducing effect evaluation index corresponding to the non-noise reducing headphones in each noise environment test group, so as to fully understand the advantages and disadvantages of the noise reducing effect and better evaluate the performance of the noise reducing headphones. At the same time, by comparing the data with the non-noise reducing headphones, it is possible to avoid users' doubts about the performance and effect of the noise reducing headphones, thereby helping them to better choose suitable noise reducing headphones.

[0082] The comprehensive noise reduction analysis feedback module is used to analyze the comprehensive noise reduction index of the noise reduction headphones in the current production batch. And when it is less than the set reference comprehensive noise reduction index, it indicates that the noise reduction effect of the noise reduction headphones in the current production batch is unqualified, and feedback is given.

[0083] In a specific embodiment of the present invention, the calculation formula for the comprehensive noise reduction index of the noise reduction headphones in the current production batch is: Among them, b1 and b2 represent the weights of the set noise reduction adaptability and noise reduction difference corresponding to the comprehensive noise reduction evaluation respectively.

[0084] The embodiment of the present invention analyzes the noise reduction adaptability of the noise reduction headphones in the current production batch corresponding to the noise environment level and the noise reduction difference between the noise reduction headphones and non-noise reduction headphones, thereby analyzing the comprehensive noise reduction index of the noise reduction headphones in the current production batch and providing feedback, thereby intuitively demonstrating the noise reduction effect of the noise reduction headphones, realizing a multi-dimensional analysis of the noise reduction effect of the noise reduction headphones, improving the persuasiveness of the comprehensive noise reduction index analysis of the noise reduction headphones, and simultaneously improving the user experience and satisfaction with the noise reduction headphones.

[0085] The above contents are merely examples and explanations of the concept of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the concept of the invention or exceed the scope defined by the present invention, they shall all fall within the protection scope of the present invention.

Claims

1. An intelligent analysis system for noise reduction effect of noise reduction headphones based on test data, It is characterized in that include: The noise-cancelling headphone sound state analysis module is used to randomly select a number of noise-cancelling headphones from the current production batch of the target production factory, and divide them into noise environment test groups in equal proportions, perform noise-cancelling simulation tests on the noise-cancelling headphones in each noise environment test group, collect the loudness corresponding to the simulated noise in each noise environment test group, and collect the loudness, timbre and signal-to-noise ratio of the sound received by each noise-cancelling headphone in each noise environment test group during the corresponding noise-cancelling simulation test, and analyze the comprehensive noise-cancelling effect evaluation index corresponding to the noise-cancelling headphones in each noise environment test group; A cloud database is used to store a set of waveforms corresponding to each timbre and store abnormal timbre of the noise reduction headphones; The noise reduction headphone environmental adaptability analysis module is used to analyze the noise reduction adaptability of the noise reduction headphones of the current production batch to the corresponding noise environment level ξ; The non-noise-cancelling headphone sound comparison and analysis module is used to place the same number of non-noise-cancelling headphones in each noise environment test group, collect the loudness, timbre and signal-to-noise ratio of the sound received by each non-noise-cancelling headphone in each noise environment test group during the corresponding noise reduction simulation test, and analyze the comprehensive noise reduction effect evaluation index corresponding to the non-noise-cancelling headphones in each noise environment test group according to the analysis method of the comprehensive noise reduction effect evaluation index corresponding to the noise reduction headphones in each noise environment test group, and analyze the noise reduction difference degree ψ between the noise reduction headphones and the non-noise reduction headphones in the current production batch; Comprehensive noise reduction analysis feedback module, used to analyze the comprehensive noise reduction index of noise reduction headphones in the current production batch When it is less than the set reference comprehensive noise reduction index, it indicates that the noise reduction effect of the noise reduction headphones in the current production batch is unqualified, and feedback is given; The specific analysis process of analyzing the comprehensive noise reduction effect evaluation index corresponding to the noise reduction headphones in each noise environment test group is as follows: A1. Calculate the noise reduction effect evaluation index β of each noise reduction headset in each noise environment test group based on the loudness, timbre and signal-to-noise ratio of the sound received by each noise reduction headset in the corresponding noise reduction simulation test. ij , where i represents the number of the noise environment test group, i=1,2,...,n, and j represents the number of the noise reduction headset, j=1,2,...,m; A2. Compare the noise reduction effect evaluation index corresponding to each noise reduction headset in each noise environment test group with the set reference noise reduction effect evaluation index. If the noise reduction effect evaluation index corresponding to a noise reduction headset in a noise environment test group is greater than or equal to the set reference noise reduction effect evaluation index, then the noise reduction headset is recorded as a normal noise reduction headset. Count the number of normal noise reduction headsets in each noise environment test group, recorded as χ i ; A3. Calculate the comprehensive noise reduction effect evaluation index δ corresponding to the noise reduction headphones in each noise environment test group i , Among them, β′ and σ 1 They represent the noise reduction effect evaluation index and the proportion of normal noise reduction headphones for the reference setting, respectively. 1 and a 2 They respectively represent the set noise reduction effect evaluation index and the weight of the comprehensive noise reduction effect evaluation corresponding to the proportion of normal noise reduction headphones, and m represents the number of noise reduction headphones; The specific calculation process of calculating the noise reduction effect evaluation index corresponding to each noise reduction headset in each noise environment test group is as follows: B1. The loudness of the sound received by each noise reduction headset in each noise environment test group during the corresponding noise reduction simulation test is recorded as ε ij ; B2. Record the loudness of the simulated noise in each noise environment test group as B3. Calculate the loudness reduction index ρ of each noise reduction headset in each noise environment test group when receiving sound ij , Among them, Δε represents the loudness reduction value of the set reference; B4. Based on the timbre and signal-to-noise ratio of the sound received by each noise cancelling headset in each noise environment test group during the corresponding noise reduction simulation test, calculate the sound quality evaluation index ω corresponding to each noise cancelling headset in each noise environment test group when receiving sound ij ; B5. Calculate the noise reduction effect evaluation index β corresponding to each noise reduction headset in each noise environment test group ij , Among them, a 3 and a 4 They respectively represent the weights of the noise reduction effect evaluation corresponding to the set loudness reduction index and sound quality evaluation index; The specific calculation process of calculating the sound quality evaluation index corresponding to each noise reduction headset in each noise environment test group when receiving sound is as follows: C1. Based on the timbre of the sound received by each noise cancelling headset in each noise environment test group during the corresponding noise reduction simulation test, calculate the timbre compliance coefficient ζ corresponding to each noise cancelling headset in each noise environment test group when receiving the sound ij ; C2. The signal-to-noise ratio of the sound received by each noise reduction headset in each noise environment test group during the corresponding noise reduction simulation test is recorded as μ ij ; C3. Calculate the sound quality evaluation index ω corresponding to each noise reduction headset in each noise environment test group when receiving sound ij , Among them, ζ′ and μ′ represent the timbre matching coefficient and signal-to-noise ratio of the reference, respectively. 5 and a 6 They respectively represent the weight of the sound quality evaluation corresponding to the set timbre conformity coefficient and signal-to-noise ratio; The noise reduction adaptability of the noise reduction headphones of the current production batch to the noise environment level is analyzed, and the specific analysis process is as follows: D1. Compare the comprehensive noise reduction effect evaluation index corresponding to the noise reduction headphones in each noise environment test group with the comprehensive noise reduction effect evaluation index of the set reference; D2. If the comprehensive noise reduction effect evaluation index corresponding to the noise reduction headphones in each noise environment test group is greater than the set reference comprehensive noise reduction effect evaluation index, the noise reduction adaptability of the noise reduction headphones in the current production batch corresponding to the noise environment level is recorded as D3. If the comprehensive noise reduction effect evaluation index of the noise reduction headphones in a certain noise environment test group is less than the set reference comprehensive noise reduction effect evaluation index, then the noise reduction adaptability of the noise reduction headphones in the current production batch corresponding to the noise environment level is set. D4. If the comprehensive noise reduction effect evaluation index corresponding to the noise reduction headphones in each noise environment test group is less than the set reference comprehensive noise reduction effect evaluation index, the noise reduction adaptability of the noise reduction headphones in the current production batch corresponding to the noise environment level is recorded as D5. In summary, we get the noise reduction adaptability ξ of the current production batch of noise reduction headphones corresponding to the noise environment level, where the value of ξ is or or The specific analysis process of analyzing the noise reduction difference between the noise reduction headphones and the non-noise reduction headphones in the current production batch is as follows: E1. Subtract the comprehensive noise reduction effect evaluation index corresponding to the noise reduction headphones in each noise environment test group from the comprehensive noise reduction effect evaluation index corresponding to the non-noise reduction headphones in each noise environment test group to obtain the comprehensive noise reduction effect deviation between the noise reduction headphones and the non-noise reduction headphones in each noise environment test group; E2. Using the noise environment test group as the horizontal coordinate and the comprehensive noise reduction effect deviation as the vertical coordinate, construct a comprehensive noise reduction effect deviation curve between the noise reduction headphones and the non-noise reduction headphones, and locate the slope value from the curve as the comprehensive noise reduction effect deviation growth rate between the noise reduction headphones and the non-noise reduction headphones, marking it as K; E3, setting the influencing factor λ of the deviation growth rate of the comprehensive noise reduction effect between the noise reduction headphones and the non-noise reduction headphones; E4. Calculate the noise reduction difference between the noise reduction headphones and non-noise reduction headphones in the current production batch, Among them, K′ represents the deviation growth rate of the comprehensive noise reduction effect of the set reference; The specific setting process of setting the influencing factor of the deviation growth rate of the comprehensive noise reduction effect between the noise reduction headphones and the non-noise reduction headphones is as follows: F1. Taking the reference comprehensive noise reduction effect deviation growth rate as the slope, a reference baseline is constructed in the comprehensive noise reduction effect deviation curve between the noise reduction headphones and the non-noise reduction headphones, and the number of noise environment test groups below the reference baseline is located from the comprehensive noise reduction effect deviation curve between the noise reduction headphones and the non-noise reduction headphones, and it is used as the deviation noise environment test group number, recorded as F2. Locate the maximum and minimum values ​​of the comprehensive noise reduction effect deviation from the comprehensive noise reduction effect deviation curve between the noise reduction earphone and the non-noise reduction earphone, and record them as ΔH respectively. max and ΔH min ; F3, set the comprehensive noise reduction effect deviation growth rate influencing factor λ between noise reduction headphones and non-noise reduction headphones, in, and ΔH′ respectively represent the number of deviation noise environment test groups and the deviation extreme value difference of the comprehensive noise reduction effect. 7 and a 8 They respectively represent the set number of deviation noise environment test groups and the evaluation weight of the influencing factor of the deviation growth rate of the comprehensive noise reduction effect corresponding to the deviation extreme value difference of the comprehensive noise reduction effect, and e represents a natural constant; The calculation formula for the comprehensive noise reduction index of the noise reduction headphones in the current production batch is: Among them, b 1 and b 2 They respectively represent the weights of the set noise reduction adaptability and noise reduction difference corresponding to the comprehensive noise reduction evaluation.

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