Material sound absorption coefficient measurement method based on double-sided array and generalized inverse algorithm

The invention relates to a material sound absorption coefficient measurement method based on a double-sided array and a generalized inverse algorithm. The method comprises the steps of sound absorption material configuration, sound transmission data measurement, sound absorption data reconstruction and sound absorption data processing. When a sound absorption material is configured, the sound absorption material is in a free field condition, and the sound absorption material does not need to be pretreated. During sound transmission data measurement, a double-sided sound transmission array is adopted for double-sided array measurement, a finite difference method is utilized, and a normal vibration velocity estimation error of the finite difference method is reduced by correcting a steeringvector, so that sound pressure and vibration velocity data of the double-sided array is obtained. During sound absorption data reconstruction, sound pressure and vibration velocity distribution on thesurface of the material i