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Question 8: Is it possible for an object which is vibrating transversely to produce sound waves?


Yes, it is possible if the surrounding medium of a vibrating object is an elastic one. It will produce sound irrespective of its transverse or longitudinal motion/vibration.
We know that when an object is vibrating it does work on the surrounding. The work appears as forcing (pushing) the molecules of the surrounding medium closer to and, then away from, one another alternatively with the to and fro motion of the vibrating object. This produces compression and rarefaction in the surrounding medium. Hence, longitudinal waves are set up in it. The sound can be heard (provided the waves are in the audible frequency range) despite the transverse vibration of the object.
As an example, in all musical instruments using strings for the sound such as Sitar, Rabab etc, the strings are vibrating in the transverse mode. But the surrounding air is experiencing compression and rarefaction of molecules and we hear the sound, longitudinal wave phenomena!


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