If r 1 1 m and at this distance from the sound source we measure L p1 100 dB at a distance of r 2 2 m we will have a sound pressure equal to. Angle of the Reflected Wave. Decibel level 10log I10 -12 100.
Therefore speed of sound 28697 ms.
10 10 I10 -12 and so I 10 10 x10 -12 10 -2 Wm -2. The sound travels faster through media with higher elasticity andor lower density. Sound travels at a speed of about 344 meters or 1129 feet per second. For instance the distance ratio is 201.