a) Ranks of the curves according to the linear speed of v of the sound. b) Ranks of the curves according to the angular speed ω of the merry-go-rounds. c) Ranks of the curves according to the radii r of the merry-go-rounds.

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Answer 1

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Chapter 17, Problem 8Q

To determine

To find:

a) Ranks of the curves according to the linear speed of v of the sound.

b) Ranks of the curves according to the angular speed ω of the merry-go-rounds.

c) Ranks of the curves according to the radii r of the merry-go-rounds.

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8 A friend rides, in turn, the rims of three fast merry-go-rounds while holding a sound source that emits isotropically at a certain frequency. You stand far from each merry-go-round. The frequency you hear for each of your friend's three rides varies as the merry-go- round rotates. The variations in frequency for the three rides are given by the three curves in Fig. 17-29. Rank the curves according to (a) the linear speed v of the sound source, (b) the angular speeds o of the merry-go-rounds, and (c) the radii r of the merry-go-rounds, greatest first. 2-

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.

10-11. You have been asked to evaluate the A-weighted sound level of a new model lawn mower and make a recommendation on an acceptable noise spectrum to achieve 74 dBA. Three approaches are being considered by the manufacturer: (1) an improved muffler that will reduce the sound level 3 dB in each frequency band, (2) a reduction in the speed of the mower that will reduce the sound level 5 dB in each frequency band, and (3) an engine redesign that will reduce the sound level 15 dB in the five highest frequency bands. Using a spreadsheet program you have written, compute the A-weighted sound level for the sound spectrum shown on the following page and develop a recommended noise spectrum based on the manufac- turer's alternatives that results in a sound level of less than 74 dBA. Assume that each of the alternative reductions may be added together (by decibel addition) in each frequency band in which it is applicable. 775 NOISE POLLUTION Band center Band level frequency (Hz) (dB) 63 78…

Answer 2

Question

Chapter 17, Problem 8Q

To determine

To find:

a) Ranks of the curves according to the linear speed of v of the sound.

b) Ranks of the curves according to the angular speed ω of the merry-go-rounds.

c) Ranks of the curves according to the radii r of the merry-go-rounds.

Expert Solution & Answer

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Check out a sample textbook solution

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Answer 3

Question

Chapter 17, Problem 8Q

To determine

To find:

a) Ranks of the curves according to the linear speed of v of the sound.

b) Ranks of the curves according to the angular speed ω of the merry-go-rounds.

c) Ranks of the curves according to the radii r of the merry-go-rounds.

Expert Solution & Answer

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Check out a sample textbook solution

See solution

Answer 4

Question

Chapter 17, Problem 8Q

To determine

To find:

a) Ranks of the curves according to the linear speed of v of the sound.

b) Ranks of the curves according to the angular speed ω of the merry-go-rounds.

c) Ranks of the curves according to the radii r of the merry-go-rounds.

Expert Solution & Answer

Want to see the full answer?

Check out a sample textbook solution

See solution

Answer 5

Chapter 17, Problem 8Q

To determine

To find:

a) Ranks of the curves according to the linear speed of v of the sound.

b) Ranks of the curves according to the angular speed ω of the merry-go-rounds.

c) Ranks of the curves according to the radii r of the merry-go-rounds.

Answer 6

Chapter 17, Problem 8Q

To determine

To find:

a) Ranks of the curves according to the linear speed of v of the sound.

b) Ranks of the curves according to the angular speed ω of the merry-go-rounds.

c) Ranks of the curves according to the radii r of the merry-go-rounds.

Answer 7

Chapter 17, Problem 8Q

To determine

To find:

a) Ranks of the curves according to the linear speed of v of the sound.

b) Ranks of the curves according to the angular speed ω of the merry-go-rounds.

c) Ranks of the curves according to the radii r of the merry-go-rounds.

Answer 8

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Answer 9

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Answer 10

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Answer 11

Ch. 17 - In a first experiment, a sinusoidal sound wave is...Ch. 17 - In Fig. 17-25, two point sources S1, and S2, which...Ch. 17 - In Fig. 17-26, three long tubes A,B, and C are...Ch. 17 - Prob. 4Q Ch. 17 - In Fig. 17-27, pipe A is made to oscillate in its...Ch. 17 - Prob. 6Q Ch. 17 - Figure 17-28 shows a moving sound source S that...Ch. 17 - Prob. 8Q Ch. 17 - For a particular tube, here are four of the six...Ch. 17 - Prob. 10Q

a) Ranks of the curves according to the linear speed of v of the sound. b) Ranks of the curves according to the angular speed ω of the merry-go-rounds. c) Ranks of the curves according to the radii r of the merry-go-rounds.

Solution Summary: The author explains how to find the ranks of curves according to the linear speed of v of the sound, the angular frequency

Concept explainers

To find:

a) Ranks of the curves according to the linear speed of v of the sound.

b) Ranks of the curves according to the angular speed ω of the merry-go-rounds.

c) Ranks of the curves according to the radii r of the merry-go-rounds.

Want to see the full answer?

Chapter 17 Solutions

a) Ranks of the curves according to the linear speed of v of the sound. b) Ranks of the curves according to the angular speed ω of the merry-go-rounds. c) Ranks of the curves according to the radii r of the merry-go-rounds.

Solution Summary: The author explains how to find the ranks of curves according to the linear speed of v of the sound, the angular frequency

Concept explainers

To find: a) Ranks of the curves according to the linear speed of v of the sound. b) Ranks of the curves according to the angular speed ω of the merry-go-rounds. c) Ranks of the curves according to the radii r of the merry-go-rounds.

Want to see the full answer?

Chapter 17 Solutions

To find:

a) Ranks of the curves according to the linear speed of v of the sound.

b) Ranks of the curves according to the angular speed ω of the merry-go-rounds.

c) Ranks of the curves according to the radii r of the merry-go-rounds.