So if you're standing in front of the ultrasonic sound wave, you can hear the sound.

所以如果你站在超音速声波的前面，你能听到声音。

If there is no ultrasonic sound in the received signal, the maximal value is not in order.

而当回波中没有超声信号时，相关值的极大值没有固定规律。

There are various ways to measure distance, including ultrasonic sound waves and infrared light.

有各类分歧的办法来丈量间隔，包罗超声波声波和红外光。

The application of ultrasonic sound system of measuring distance is also presented in this paper .

给出了超声波语音测距系统在车辆避障中的实际应用。

These high intensity ultrasonic sound waves (20 ~ 65khz) are out of the range of hearing of humans are most household pets, but pests.

这些高强度的超声波(20 ~ 65khz)不在人类和大部分家养宠物的听觉范围内，但能被害虫听到。