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

X is ultrasound. Y is infrasound, Z is audible sound.

X have frequency more than 20kHz.

Y have frequency below 20Hz

Z have frequency between 20Hz -20,000Hz.