Sound of what intensity is harmful for ears?

Objects that produce sound: I Fire crackers II Siren III Mouth organ IV Fire alarm V Factory machines Which of the given objects does not produce sound that is harmful to the human ear?

A baby's mouth is 30 cm from her father's ear and 3.0 m from her mother's ear. What is the difference between the sound intensity levels heard by the father and by the mother.

A baby's mouth is 30 cm from her father's ear and 3.0 m from her mother's ear. What is the difference between the sound intensity levels heard by the father and by the mother.

What is the intensity of painful sound?

Two sounds differ in sound level by 3.00 dB. What is the ratio of the greater intensity to the smaller intensity?

Loudness measures the sound energy reaching the ear per second and depends on the amplitude of the sound wave. What is the unit used to measure the loudness of sound?

Name the following : A level of sound above which sound can be harmful to humans.