Yang Jie, Tang Dajun, Williams Kevin L
J Acoust Soc Am. 2008 Sep;124(3):EL116-21. doi: 10.1121/1.2963038.
Knowledge of sediment sound speed is crucial for predicting sound propagation. During the Shallow Water '06 experiment, in situ sediment sound speed was measured using the Sediment Acoustic-speed Measurement System (SAMS). SAMS consists of ten fixed sources and one receiver that can reach a maximal sediment depth of 3 m. Measurements were made in the frequency range 2-35 kHz. Signal arrival times and propagation distances were recorded, from which sediment sound speed was determined. Preliminary results from three deployments show that SAMS was capable of determining sediment sound speed with uncertainties less than 1.6%. Little dispersion in sediment sound speed was observed.
沉积物声速的知识对于预测声音传播至关重要。在“06浅水”实验期间，使用沉积物声速测量系统（SAMS）对原位沉积物声速进行了测量。SAMS由十个固定声源和一个接收器组成，接收器能够达到的最大沉积物深度为3米。测量在2 - 35千赫的频率范围内进行。记录了信号到达时间和传播距离，并据此确定沉积物声速。三次部署的初步结果表明，SAMS能够确定沉积物声速，其不确定度小于1.6%。观察到沉积物声速几乎没有色散。
