Physics for Scientists and Engineers
6th Edition
ISBN: 9781429281843
Author: Tipler
Publisher: MAC HIGHER
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Chapter 15, Problem 55P
(a)
To determine
To Calculate:The speaker’s total acoustic output power.
(b)
To determine
To Calculate:The distance from the speaker results into threshold of pain intensity.
(c)
To determine
To Calculate:The intensity level of sound at the distance
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The area of a typical eardrum is about 5.0 x 105 m2,
(a) Calculate the sound power (the energy per second) incident on an eardrum at the threshold of hearing.
(b) Calculate the sound power incident on an eardrum at the threshold of pain.
A small source of sound waves emits uniformly in all directions.The total power output of the source is P. By what factor mustP increase if the sound intensity level at a distance of 20.0 m from thesource is to increase 5.00 dB?
Sound is detected when a sound wave causes the tympanic membrane (the ear drum) to vibrate. Typically, the diameter of this membrane is about 8.4 mm in humans. A) how much energy is delivered to the eardrum each second when someone whispers (20 dB) into your ear? B) to comprehend how sensitive the ear is to very small amounts of energy, calculate how fast a typical 2.0 mg mosquito would have to fly (in mm/s) to have this amount of kinetic energy.
Chapter 15 Solutions
Physics for Scientists and Engineers
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