As people sing in church, the sound level everywhere inside is 125 dB. No sound

Question

As people sing in church, the sound level everywhere inside is 125 dB. No sound is transmitted through the massive walls, but all the windows and doors are open on a summer morning. Their total area is 23.5 m2. How much sound energy is radiated in 15.0 min? Suppose the ground is a good reflector and sound radiates uniformly in all horizontal and upward directions. Find the sound level 3.0 km away. The area of a typical eardrum is about 5.00 times 10-5 m2. Calculate the average sound power incident on an eardrum at the threshold of pain, which corresponds to an intensity of 1.00 W/m2. How much energy is transferred to the eardrum exposed to this sound for 4.60 min? The area of a typical eardrum is about 5.00 times 10-5 m2. Calculate the average sound power incident on an eardrum at the threshold of pain, which corresponds to an intensity of 1.00 W/m2. How much energy is transferred to the eardrum exposed to this sound for 4.60 min?

Explanation / Answer

sound intesity of 125 db = 3.162 sound energy = 23.5 *3.162 = 74.307J

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