Question

(1 point) You are trying to overhear a juicy conversation, but from your distance of 30 m, it sounds like only an average whisper of 10 dB. You decide to move closer so that the intensity level increases to 60 dB. How close would you have to be in order to hear this intensity level? (Note that the answer might be uncomfortably close.) Distance =

Answer 1

for sound in dB is given as minimum )-(1) ... hearing. d8, = to log dBe = 10109 ) ~2) Ioan intensity for human I intensity of sound at 3om where 281 = to: Iz intensity of sound for 60 dB dB2260 l Io=1012 W/m² Froom (1) CD BOI OT = OT = TI Į (07/07OT X °I & ode] M ,-01 = OTX 31-05 = 'I from (2) 60 = to log (1) → Iz z Iox 101 => Iz a 10-12 x 106 W/m" » Iz = 10-6 W/m2 on I am arg, power I = Parg larg We know where then where .rary of the sound source r1=3om (the distance where found is do dB) n distance where sound is 60 dB ng = 7 1 / 2 X" 40-4 * r = V 10-6 x 30 * r T 01095m. in onder . : » r = 0.0948m an Then the distance should be 0.095 m to recieve 60 dB sound