Audio adjustment method for active noise reduction and related audio adjustment device

Abstract

The invention provides an audio adjustment method for active noise reduction and a related audio adjustment device. The audio adjustment method comprises the following steps: playing single-frequencysound with the frequency of fk; receiving the single-frequency sound, and filtering the single-frequency sound to generate M groups of filter coefficients, each group of filter coefficients in the M groups of filter coefficients including a combination of amplitudes and phases, and the M groups of filter coefficients being different values from each other; determining an mth group of filter coefficients from the M groups of filter coefficients, so that the energy of the corresponding frequency fk is minimum; and adjusting the single-frequency sound according to the mth group of filtering coefficients to obtain the adjusted single-frequency sound with the corresponding frequency fk.

Description

technical field [0001] The present invention relates to an audio adjustment method and a related device, in particular to a method capable of improving the noise reduction effect of an active noise cancellation (Active noise cancellation, ANC) earphone and a related device. Background technique [0002] When using earphones to listen to music, the noise reduction function is an extremely important link. Among them, passive noise reduction is to slightly reduce the volume of the noise finally reaching the human ear through the material or structure of the earphone itself. Pleasant sounds or sounds of specific frequencies) did not improve much. Compared with passive noise reduction, the effect of active noise reduction is much more significant than that of passive noise reduction. Therefore, more and more earphone products adopt active noise reduction technology. [0003] However, in the product development of active noise-cancelling headphones, the first problem is the need ...

AI Technical Summary

Problems solved by technology

[0003] However, in the product development of active noise-cancelling headphones, the first problem is the need to adjust the degree of noise reduction precisely, which needs to consider the impact of the earphone structure, components, earplugs / earmuffs and other materials on the environmental noise. Responses, these responses are also often referred to as the primary path response (Primary path response), the processing method of the prior art is to consider the influence of all the above factors, and the various calculations and measurements required inevitably require expensive precision instruments (for example, audio analyzer (audio analyzer)) to achieve

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