The sound level at a distance of 3.00 m from a source is 120 dB. At what distance will the sound level be (a) 100 dB and (b) 10.0 dB?

The sound level at a point 5.0 m away from a point source is 40 dB. What will be the level at a point 50 m away from the source ?

The sound level at a point 5.0 m away from a point source is 40 dB. What will be the level at a point 50 m away from the source ?

The sound level at a point 5-0 m away from a point source is 40 dB. What will be the level at a point 50 m away from the source ?

At a distance of 5.0 m from a point sound source, the sound intensity level is 110 dB. At what distance is the intensity level 95 dB?

The sound level at a point is increased by 30 dB. What is factor is the pressure amplitude increased?

The sound level at a point is increased by 30 dB. What is factor is the pressure amplitude increased?

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.

Intensity level at a distance 200 cm from a point source of sound is 80 dB. If there is it loss of acoustic power in air and intensity of threshold hearing is 10^-12 W m^-2 , then the intensity level at a distance of 4000 cm from source is (log 20 = 1.3)