What is sound ?

The sound level of a dog's bark is 50 dB . The intensity of a rock concert is 10,000 times that of dog's bark. What is the sound level of the rock concert?

A rock band give rise to an average sound level of 102 dB at a distance of 20 m from the center of the band . As an approximation , assume that the band radiates sound equally into a sphere. What is the sound power output of the band?

The speaker of a public address system emits 20 kW power, considering it a point source. What is the sound intensity level at a point 4.00 m away?

A firework charge is detonated many metres above the ground. At a distance of 400 m from the explosion, the acoustic pressure reaches a maximum of 10.0(N)/(m^2) . Assume that the speed of sound is constant at 343 (m)/(s) throughout the atmosphere over the region considered, the ground absorbs all the sound falling on it, and the air absorbs sound energy at the rate of 7.00 (dB)/(km) . What is the sound level (in decibels) at 4.00 km from the explosion?

What causes sound ?

What is meant by sound ranging ? Give one use of sound ranging,

What characteristics of sound would change if there is a change in its : Amplitude

A family ice show is held at an enclosed arena. The skaters perform to music with level 80.0dB. This level is too loud for your baby, who yells at 75.0 dB. (a) What total sound intensity engulfs you? (b) what is the combined sound level ?

A family ice show is held at an enclosed arena. The skaters perform to music with level 80.0dB. This level is too loud for your baby, who yells at 75.0 dB. (a) What total sound intensity engulfs you? (b) what is the combined sound level ?

A dog while barking delivers about 1 mW of power. If this power is uniformly distributed over a hemispherical area, what is the sound level at a distance of 5 m? What would the sound level be if instead of 1 dog, 5 dogs start barking at the same time each delivering 1 mW of power