Embibe Experts Solutions for Chapter: Sound, Exercise 1: Exercise

Sound levels lower than eighty decibels is not harmful to the ears.

Answer in one word.
Sound level which is comfortable for the human ear.

(Choose from: $20-350 \mathrm{dB}$/ $60-65 \mathrm{dB}$ )

Sound which is pleasant to our ears is called _____.

Which part of the music instrument dholak vibrates to produce sound?
(Choose one of the following: Air column/ Strings/ Stretched membrane).

Answer in one word:
Part of human body that produces sound (larynx/ vocal cord).

Which part of the music instrument trumpet vibrates to produce sound?
(Choose one of the following: Air column/ Strings/ Shell of the Trumpet).

Which part of the musical instrument drum vibrates to produce sound?

(Choose from: String/Membrane)

Sound is produced when objects _____.