Question

Three different vibrating objects produces three types of sounds ‘X’, ‘Y’ and ‘Z’. the sounds ‘X’ and ‘Y’

cannot be heard by man having normal range of hearing but sound ‘Z’ can be heard easily. The sound

‘X’ can be heard by bats whereas sound ‘Y’ can be heard by rhinoceros. What types of sound are ‘X’,

‘Y’ and ‘Z’.​

Answer 1

Three different vibrating objects produce three types of sounds X, Y, and Z. Sounds X and Y cannot be heard by a man having normal a range of hearing but sound Z can be heard easily. ... The sound similar to that which is produced during an earthquake before the main shock wave is generated.