What can be defined as a rapid back and forth movement of a body about a central position ?

The part of the outer ear that is vsible to us is called

The maximum displacement of the bob from the mean position during oscillation is called

An objects oscillates how many times per second

Sound waves of frecuencies above 50,000 Hz are called ultrasoniv waves.

Loudness of aeroplane in decible (dB)

Speed of mercury

Which is not a wind instrument

The branch of physics that delays with the study of sound