sound pressure spectrum meaning in Chinese

声压谱

On the basis of this solution , this paper gives the sound pressure spectrum densities of broad band and harmonic sources , and then discusses the characteristics of these sound fields respectively in detail
在此解基础上，本文得到宽频源和简谐源的近场声压谱密度，指出此2种声源近声场各自的特点及源的旋转半径和轴向位置对声场结构的影响。
A sorting method of the helicopter noise sources is given . the temporal waveform and spectrum of the noise signature is analyzed . at last , the sound pressure spectrum density level is estimated with the experimental data taken from a specific navy helicopter
扼要阐述了直升机噪声的产生和分类，考察了直升机信号的波形和频谱特征，并对特定的直升机噪声的声压谱密度级进行了计算。