You are standing in the middle of a large room listening to a cacaphony of sound

Question

You are standing in the middle of a large room listening to a cacaphony of sounds. Rank the intensity level of the sounds from each source (1=loudest, 2= next loudest, ...) Consider all objects to be right next to you. (Remember that if you have a tie, you skip some ranks.)

Ten buzzers each producing a sound with intensity level of 62dB.

An object emitting a sound with an intensity of 70dB.

Four buzzers each producing a sound with intensity level of 61dB.

Two buzzers each producing a sound with intensity level of 68dB.

Explanation / Answer

62 dB buzzer

I = 10(62/10) * 10-12 = 1.58 x 10-6 s so 10 would produce 1.58 x10-5 W/m2

= 10 dB * log (1.58 x10-5 / 10-12) = 71.99 dB

--------------------------------------------------

61 dB buzzer

I = 10(61/10) * 10-12 = 1.26 x 10-6 so 4 would produce = 5.04 x 10-6 W/m2

= 10dB * log (5.04 x 10-6 / 10^-12) = 67 dB

---------------------------------------------------

68 dB buzzer

I = 10(68/10) * 10-12 = 6.31 x 10-6 so 2 would produce = 1.26 x 10-5 W/m2

= 10 dB * log(1.26 x 10-5 / 10-12) = 71 dB

---------------------------------------------------

Related Questions

Navigate

• Browse (All)
• Browse Y
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.