very low sound frequency的意思|示意

At ground level, such vibrations-akin to low-frequency sound waves-are very small, only about the size of the vertical motions that produce them.

在地表，这种类似于低频声波的振动非常小，只相当于造成它们的垂直振动的幅度。

Existing predominantly, in the Very Low frequency part of the radio spectrum that corresponds with the audio frequency range, we can experience this activity as audible sound.

尽管这种活动主要存在于无线电声音频率分区的超低频区域，我们还是能够通过听觉来捕捉到它。

Ultra low noise fiber optical microphone designed for monitoring very weak sound signals in selected frequency bandwidths.

超低噪音光纤麦克风设计用于监测在选定的频率带宽内非常微弱的信号。

The PMS-15 Sub-Woofer is a 15 "enclosure designed for the reproduction of the sub low frequency spectrum of sound with a very high quality reproduction."

进口工业网的PMS - 15低音炮是15“外壳，对声音的低音频率具有高质量的还原作用。”