Loudness of sound from an isotropic point source at a distace of `70cm` is `20dB`. What is the distance (in m) at which it is not heard.

Loudness of sound from an isotropic point source at a distance of 10m is 20dB . If the distance at which it is not heard is 10^(K) in meters find K .

Loudness of sound from on isotopic point source at distance of 10 m is 20 dB. Find the loudness (in dB) at a point at a distance 10^(7//4) m from the source.

Loudness of sound from on isotopic point source at distance of 10 m is 20 dB. Find the loudness (in dB) at a point at a distance 10^(7//4) m from the source.

Intensity of sound at a point is its distance from the source

The intensity of sound from a point source is 1.0 xx 10^-8 Wm^-2 , at a distance of 5.0 m from the source. What will be the intensity at a distance of 25 m from the source ?

The intensity of sound from a point source is 1.0 xx 10^-8 Wm^-2 , at a distance of 5.0 m from the source. What will be the intensity at a distance of 25 m from the source ?

The intensity of sound from a point source is 1.0 xx 10^-8 Wm^-2 , at a distance of 5.0 m from the source. What will be the intensity at a distance of 25 m from the source ?

At a distance r_(0) = 20 m form an isotropic point source of sound the loudness level is L_(0) = 30 dB . Neglicting the damping of the sound wave, find : (a) the loudness level at a distacne r = 10 m form the source, (b) the distance form the source at which sound is not heard.

A person is standing at a distance D from an isotropic point source of sound He walks 50.0 m towards the source and observes that the intensity of the sound has doubled. His initial distance D from the source is