Noise reduction simulation method and system for feedback active noise reduction earphones
A technology of active noise reduction and noise reduction, which is applied in active noise control, musical instruments, sounding instruments, etc., can solve problems such as unfavorable headphone design and large differences, and achieve the effect of improving accuracy and optimizing the simulation system
Active Publication Date: 2020-09-22
GEER TECH CO LTD
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However, it is found through actual tests that see image 3 As shown, the curve a is the actual measurement result of the noise reduction amount of the active noise reduction earphone, the curve b is the noise reduction amount calculated by using the above noise reduction sensitivity function simulation, the horizontal axis is the frequency (Hz), and the vertical axis is the noise reduction amount ( dBSPL), it can be seen that the noise reduction calculated in this way is roughly the same as the actual noise reduction, but there is a large difference around 1KHz, which is not conducive to the design of the earphone
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[0025] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that the relative arrangements of components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.
[0026] The following description of at least one exemplary embodiment is merely illustrative in nature and in no way taken as limiting the invention, its application or uses.
[0027] Techniques, methods and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, such techniques, methods and devices should be considered part of the description.
[0028] In all examples shown and discussed herein, any specific values should be construed as exemplary only, and not as limitations. Therefore, other instances of the exemplary embodiment may have dif...
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The invention discloses a method and module for calculating noise reduction sensitivity of a reaction type active noise reduction headset, a method and system for simulating noise reduction amount of the reaction type active noise reduction headset, and computer equipment. According to the method for calculating noise reduction sensitivity, the noise reduction sensitivity of the reaction type active noise reduction headset is calculated according to the formula as specified in the description, wherein H is noise reduction control circuit response, G is a transfer function from a loudspeaker to an acoustical path of an error microphone, Ppv is a transfer function from the error microphone in a primary path to ears of people, Gv is a transfer function from the loudspeaker to an acoustical path of ears of people, and Sv is noise reduction sensitivity. The method for calculating noise reduction sensitivity of the reaction type active noise reduction headset and the system for simulating noise reduction amount are optimized.
Description
technical field [0001] The present invention relates to acoustic technology, in particular, to a calculation method of noise reduction sensitivity of feedback active noise reduction earphones, a simulation method of noise reduction amount of feedback active noise reduction earphones, a noise reduction sensitivity calculation module of feedback active noise reduction earphones, A noise reduction simulation system for feedback-type active noise reduction earphones, and computer equipment. Background technique [0002] With the continuous development of society, noise pollution has attracted more and more attention. Especially low-frequency noise is very harmful to health, and it is also a long-standing problem in the field of noise control. [0003] Traditional passive noise control methods have little effect on low-frequency noise reduction, and active noise control technology can make up for the deficiency of passive noise control technology. The active noise control techn...
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IPC IPC(8): G10K11/178
CPCG10K11/178G10K2210/3055
Inventor 于锴华洋王若蕙李德浩
Owner GEER TECH CO LTD