Sound pulse technique is often used in the underwateracousticmeasurement, but it has transients, so it can not be used in low frequencies.
脉冲声技术是一种很常用的水声测量技术，但由于脉冲声存在着瞬态过程，严重影响了它在低频下的使用。
2
A standing wave tube measurement system is presented for measuring low frequency acoustic properties of underwater acoustic materials.
介绍一种用于水声材料低频声性能测量的驻波管测试系统。
3
In underwateracoustic engineering, improving precision of acousticmeasurement for materials in free-field is very important in design of acoustic stealthy of underwater vehicle.