Tag: conditions for hearing echo

Questions Related to conditions for hearing echo

Voice of which of the following creatures is likely to have maximum frequency ?

physics study of sound conditions for hearing echo echo ultrasound and its applications

  1. Man

  2. Cow

  3. Bird

  4. Dog

Show answer
Correct Option: C
Explanation:

Among the four creatures birds voice has higher pitch than other three. Higher pitch means higher frequency. Pitch determines the shrillness of sound.

It has been seen that the behaviour of animals becomes unusual just before the tremor is felt.what is the reason behind this?

physics study of sound conditions for hearing echo echo ultrasound and its applications

  1. Because animals are able to detect infrasonic waves produced at the time of tremor.

  2. Because animals are able to detect ultrasonic waves produced at the time of tremor.

  3. Because animals are able to detect audible waves produced at the time of tremor.

  4. All

Show answer
Correct Option: A
Explanation:

Has been seen that the behaviour of animals becomes unusual just before the tremor is felt.This is because animals are able to detect infrasonic waves produced at the time of tremor. Infrasonic waves are waves of frequency less than 20Hz.