1 What kind of device can analyze sound loudness and profile?

Let’s say for a quality check on a gearmotor, you want to check whether everything has been built correctly. If correct, the gearmotor should make a low humming noise, if not, it will make loud noise with a different profile.

What is a device that can analyze the sound and tell you “good” or “bad”?

By the way, there is ambient noise too.

How do I need to buy to implement something like this? thanks

submitted by /u/engineheat
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