Noise reduction performance evaluation method and system

Abstract

The invention provides a noise reduction system performance evaluation method and system. The method includes determining the noise reduction depth d on the basis of the noise reduction curve; calculating the comfort level C1 of ambient sound before noise reduction and the comfort level C2 of ambient sound after noise reduction, and obtaining the comfort level change amount delta C; based on the noise reduction depth d and the comfort level change amount delta C, evaluating the noise reduction performance. A novel multi-dimensional evaluation method is formed by increasing comfort level evaluation items in an existing noise reduction system evaluation method, so that the objective noise reduction effect after noise reduction can be achieved, the degree of improvement of the subjective feeling of people can be reflected, and the method is a scientific and comprehensive evaluation method, meanwhile, the design of the noise reduction system has a guiding function, and the evaluation method is simple and easy to implement.

Description

technical field [0001] The present invention relates to the field of active noise reduction, in particular to a noise reduction performance evaluation method and system. Background technique [0002] With the continuous development of noise reduction technology, the requirements for noise reduction performance are also increasing. At this stage, the noise reduction performance is generally evaluated by the noise reduction depth (the difference between the decibel value corresponding to the frequency point with the strongest noise reduction ability and the 0 decibel value on all noise reduction frequency bands). Ideally, the greater the noise reduction depth, the better the noise reduction performance of the noise reduction system. But human hearing is a complex mechanism with a highly nonlinear phenomenon. When a person is listening to a sound, many auditory mechanisms occur simultaneously. A noise reduction system with a greater noise reduction depth will make people fee...

AI Technical Summary

Problems solved by technology

A noise reduction system with a greater noise reduction depth will make people feel less comfortable with the ambient sound after noise reduction; a noise reduction system with a lower noise reduction depth will have slightly worse noise reduction performance, but people will feel less comfortable with the noise reduction. The ambient sound after the noise is better, and the sound comfort is high

[0003] The existing noise reduction system only evaluates the noise reduction effect of the noise reduction system from the depth of noise reduction, and cannot reflect the comfort of the ambient sound after noise reduction. Therefore, the evaluation method of the existing noise reduction system is not perfect.

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