Verified Answer :

I know this answer was made a while back, but the answer that would apply for the definition is "Police sirens", for anyone who is still wondering!

Answer: A police siren is an example of a mechanical wave.

Explanation:

A Sound wave is the example of the mechanical wave. A sound wave is the longitudinal wave.

In the longitudinal wave, the particle of the medium moves parallel to the direction of the motion of the wave.

Microwave and light is the example of an electromagnetic wave.

Hence, A police siren is an example of a mechanical wave.  

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