College Physics
10th Edition
ISBN: 9781285737027
Author: Raymond A. Serway, Chris Vuille
Publisher: Cengage Learning
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Chapter 14, Problem 16P
The area of a typical eardrum is about 5.0 × 10−5 m2. Calculate the sound power (the energy per second) incident on an eardrum at (a) the threshold of hearing and (b) the threshold of pain.
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The area of a typical eardrum is about 5.0 x 10-5 m2. Calculate the sound power (the energy per second) incident on an eardrum at (a) the threshold of hearing and (b) the threshold of pain.
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 particular person's eardrum is circular, with a diameter of 9.00 mm.
(a)How much sound energy (in J) is delivered to an eardrum in one second, at the threshold of human hearing? (The threshold of human hearing is taken to be 1.00 ✕ 10−12 W/m2.)
J
(b)How much sound energy (in J) is delivered to an eardrum in one second, at the pain threshold for human hearing? (The pain threshold occurs at 1.00 W/m2, one trillion times as intense as the lowest audible level.)
J
(c)Assume that musicians onstage are exposed to sound that is 10 decibels below the human pain threshold. Over the course of a two-hour concert, how much sound energy (in J) does each ear absorb onstage?
J
Chapter 14 Solutions
College Physics
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- A sound wave traveling in air has a pressure amplitude of 0.5 Pa. What is the intensity of the wave?arrow_forwardA sound wave in air has a pressure amplitude equal to 4.00 103 Pa. Calculate the displacement amplitude of the wave at a frequency of 10.0 kHz.arrow_forwardBased on the graph in Figure 17.36, what is the threshold of hearing in decibels for frequencies of 60, 400, 1000, 4000, and 15,000 Hz? Note that many AC electrical appliances produce 60 Hz, music is commonly 400 Hz, a reference frequency is 1000 Hz, your maximum sensitivity is near 4000 Hz, and many older TVs produce a 15,750 Hz whine. Figure 17.36 The relationship of loudness in phons to intensity level (in decibels) and intensity (in watts per meter squared) for persons with normal hearing. The curved lines are equal-loudness curves—all sounds on a given curve are perceived as equally loud. Phons and decibels are defined to be the same at 1000 Hz.arrow_forward
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What Are Sound Wave Properties? | Physics in Motion; Author: GPB Education;https://www.youtube.com/watch?v=GW6_U553sK8;License: Standard YouTube License, CC-BY