Question

Please show all necessary steps.

7. If the acoustic intensity level increases by 6dB, by what factor does the sound (acoustic) intensity increase? What about a 9dB increase? What about a 12dB increase? NOTE: If we know the SPL (Li) or a sound at a distance di, we can work out the SPL (L2) at another distance, d2, from L2-L1 20 log1o

Answer 1

consider sound intensity level- β in units of dB intensity β(dB)-10log," I) for β-60 dB corresponding intensity of, sound-I(β) l(β)) and reference lo: 10- 2 watt /m (herel, corresponds to refrence of 0dB) 1-1006I 3.981 x 10- watt/m the intensity of sound increases by the factor3.981 if the sound level-β-9.0dB 1(β)-100 9 10 -7.943 (sincel, corresponds to OdB) hence the factor by which int ensity increases is-7.943 if the sound level-β-12.0dB l(β)-101210 15.85 I, (sincel, corresponds to 0dB) hence the factor by which int ensity increases is-15.85