How revibration of sound do its amplification

1.	How revibration of sound do its amplification
Answer» The phenomenon of persistence or prolongation of audible sound after the source has stopped emitting it is called reverberation. In an auditorium or big hall excessive reverberation is highly undesirable. To reduce reverberation, the roof and walls of the auditorium are generally covered with sound-absorbent materials like compressed fibreboard, rough plaster or draperies.

Discussion