Answers

2016-02-21T18:41:10+05:30
Yes we can produce sound by any kind of vibration without using energy
0
2016-02-21T18:41:56+05:30
as sound is a form of energy and energy can either be created nor be destroyed it can only be transformed so i think that without using any energy it is not possible to produce sound.

i hope it helps... 
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