Sound with intensity larger than 120 dB appears painful to a person. A small speaker delivers 2.0 W of audio output. How close can the person get to the speaker without hurting his ears ?

A microphone of cross sectional area 0.80 cm^2 is placed in front of a small speaker emitting 3.0 W of sound output. If the distance between the microphone and the speaker is 2.0 m how much energy falls on the microphone in 5.0 s?

A microphone of cross sectional area 0.80 cm^2 is placed in front of a small speaker emitting 3.0 W of sound output. If the distance between the microphone and the speaker is 2.0 m how much energy falls on the microphone in 5.0 s?

A microphone of cross sectional area 0.80 cm^2 is placed in front of a small speaker emitting 3.0 W of sound output. If the distance between the microphone and the speaker is 2.0 m how much energy falls on the microphone in 5.0 s?

A small speaker delivers 2 W of audio will one detect 120 dB intensity sound ? [Given reference intensity of sound as 10^(-12) W//m^(2) ]

A small speaker delivers 2 W of audio will one detect 120 dB intensity sound ? [Given reference intensity of sound as 10^(-12) W//m^(2) ]