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多孔声学材料是指在材料的表面以及内部,都布满了数不尽的均匀颁的微细孔,或者微间隙,所有的空隙之间相互串联,同时向外扩张,从而方便声波进到微细孔以及微间隙里。它主要受材料性质以及入射声波的作用影响,通常在高频声时效果比较佳,反之则低。本文就声管中,利用四传感器法测量材料方法,对前后表面的声压以及质点振速,以此获得较为准确、完好的测量声学材料中,声速以及声衰减系数的声管测量方法进行了探究。
Porous acoustic material refers to the surface of the material and the interior are covered with a number of micro-uniformly awarded micro-holes, or micro-gap, all the gaps in series with each other, while expanding outward, so as to facilitate the sound waves into the micro-pores And in the micro-gap. It is mainly affected by the nature of the material and the effect of the incident sound waves, usually at high frequencies sound better, and vice versa. In this paper, the acoustic tube, the use of four-sensor method of measuring materials, the front and back surface of the sound pressure and particle velocity, in order to obtain a more accurate and sound measurement of acoustic materials, sound velocity and sound attenuation coefficient of sound tube measurement methods Explore.