Noise reduction method and apparatus, test method and apparatus, electronic device, and storage medium

A filter coefficient test method, applied in a filter coefficient test system, wherein the filter coefficient test system comprises an audio collection device, an audio playing device, an audio analysis device, and a position adjusting device;

• and wherein the method comprises:
• controlling, by the position adjusting device, the audio playing device to sequentially play a preset audio in a plurality of different directions of the audio collection device;
• collecting separately, by the audio collection device, a sound of the preset audio played by the audio playing device in the plurality of different directions to obtain multiple input audios;
• and
• obtaining separately, by the audio analysis device, a spectrum feature of each of the input audios, calculating separately a corresponding filter coefficient according to each of the spectrum features, and constructing a spectrum feature-filter coefficient correspondence between the filter coefficient and the spectrum feature.

A noise reduction apparatus, comprising:

• an audio obtaining module, configured to obtain an environmental noise;
• a feature obtaining module, configured to obtain an environmental spectrum feature of the environmental noise;
• a parameter determining module, configured to obtain a spectrum feature-filter coefficient correspondence, wherein the spectrum feature-filter coefficient correspondence is a correspondence between a plurality of spectrum feature units and a plurality of filter coefficient units, each of the spectrum feature units corresponds to a unique filter coefficient unit, and the plurality of spectrum feature units are spectrum features of audio signals in a plurality of different directions collected by an audio collection device, and the parameter determining module is configured to obtain, as an environmental filter coefficient, a filter coefficient in a filter coefficient unit corresponding to the target spectrum feature unit in the spectrum feature-filter coefficient correspondence;
• and
• an audio generation module, configured to generate a noise reduction audio according to the environmental filter coefficient.