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参量差频声源具有低频、宽带,高指向性及低旁瓣的优点。非常适用于海底剖面仪及低频、高分辩率的目标探测中,在海洋水下通讯及水下导航中也有应用。其缺点是发射效率低。参量发射效率与发射声功率及(f_d/f_o)~2成比例(f_d、f_o分别为差频波及原频波的频率),为了提高参量阵的效率,通常取f_o/f_d≤10,国内已有的参量发射器通常f_o为数百千赫,f_d为数十千赫。
The parametric difference frequency sound source has the advantages of low frequency, broadband, high directivity and low side lobe. Very suitable for submarine profile and low-frequency, high-resolution target detection, underwater communications and underwater navigation also has applications. The disadvantage is the low launch efficiency. The parameter transmitting efficiency is proportional to the transmitting sound power (f_d / f_o) ~ 2 (f_d, f_o are the frequency of the difference frequency wave and the original frequency wave, respectively). In order to improve the efficiency of the parameter array, f_o / f_d≤10 is usually adopted, Some parametric launchers usually have f_o of hundreds of kilohertz and f_d of dozens of kilohertz.