The computer model finds that mid-frequency sonar is mostly filtered out for the whales, while the higher frequencies the animals use for hunting appear to be unimpeded by sonar.
电脑模型表明,突吻鲸能过滤掉声纳大部分的中频声波,而声纳也不会影响这些鲸鱼用来捕猎的高频声波。
2
Next year’s model will have a Doppler sonar to help it avoid high-speed collisions with unsuspecting swimmers.
明年的型号将配备多普勒声纳,以帮助避免与未察觉该设备的游泳者发生高速碰撞。
3
An accurate and effective sonar target echo model is a basis of detecting and recognizing sonar target, especially small scale target.