How to detect ultrasound, what instrument can detect the presence of ultrasound?

Update:10 Apr 2018

How to detect ultrasound, what instrument can detect the presence of ultrasound?

The oscilloscope can detect it. Ultrasonic Homogenizer Ultrasonic emission is very directional. The energy is concentrated and the waveform is a sine wave. A slightly better frequency meter or oscilloscope can sense it.

The oscilloscope is easy to buy, you go to the electronics market to see, or directly to the online procurement (Alibaba).

If you detect ultrasonic waves in the form of sound waves. You also need to have a sonic probe (this is expensive, it must be imported).
Hello. This is definitely testable. (Submarines use this way). However, I have not practiced this situation and cannot actually answer you.

Sonic probes have certain frequency limitations. Of course, what can be measured in theory? But taking into account the accuracy of the test, the probe has a frequency range. The choice depends on your needs.