Question

Why the loudness of sound is related to the intensity of wave producing it ?

Answer 1

Answer:

Explanation:

• Greater amplitude waves have more energy and greater intensity, so they sound louder. As distance from the sound source increases, the area covered by the sound waves increases. The same amount of energy is spread over a greater area, so the intensity and loudness of the sound is less.

• Loudness and Intensity of sound are related by the following formula:

              L=10 log(I/Io)

 where, L is the loudness of sound (in dB)

 I is the intensity of sound (in W/m²)

Iₒ is the thresold intensity of sound i.e. intensity of sound at 0dB=10⁻¹²         W/m² (a const.)

Hope it helps.