Student Name: Date: Problem #12: The intensity of sound wave A is 100 times that of sound wave B. Relative to wave B the sound level of wave A is: а. -2 dB b. +2 dB с. +10 dB d. +20 dB e. +100 db Problem #13: A source of sound emits 5.0 mW of acoustic power uniformly in all directions. (a) Calculate the intensity of this sound wave 10.0 m from the source. (b) Find the sound level in decibels 10.0 m from the source. Problem #14: The intensity, at a distance of 6 Om from a source that is radiating equally in all

Student Name: Date: Problem #12: The intensity of sound wave A is 100 times that of sound wave B. Relative to wave B the sound level of wave A is: а. -2 dB b. +2 dB с. +10 dB d. +20 dB e. +100 db Problem #13: A source of sound emits 5.0 mW of acoustic power uniformly in all directions. (a) Calculate the intensity of this sound wave 10.0 m from the source. (b) Find the sound level in decibels 10.0 m from the source. Problem #14: The intensity, at a distance of 6 Om from a source that is radiating equally in all

Principles of Physics: A Calculus-Based Text

5th Edition

ISBN:9781133104261

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter13: Mechanical Waves

Section: Chapter Questions

Problem 37P: A sound wave in air has a pressure amplitude equal to 4.00 103 Pa. Calculate the displacement...

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As you travel down the highway in your car, an ambulance approaches you from the rear at a high speed (Fig. OQ17.3) sounding its siren at a frequency of 500 Hz. Which statement is correct? (a) You hear a frequency less than 500 Hz. (b) You hear a frequency equal to 500 Hz. (c) You hear a frequency greater than 500 Hz. (d) You hear a frequency greater than 500 Hz. whereas the ambulance driver hears a frequency lower than 500 Hz. (e) You hear a frequency less than 500 Hz. whereas (he ambulance driver hears a frequency of 500 Hz.
A 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.
The speed of sound in a solid medium is 15 times greater than that in air. If the frequency of a wave in the solid is 25 kHz, then what is the wavelength? (The speed of sound in air is 344 m/s.)
Which of the following statements are correct? Which one or more? a. The perceived loudness of a sound is independent of frequency, but dependent on amplitude. b. The equal loudness contours show the variation of sound pressure level with frequency for a given loudness in phons. c. Loudness level in measured in phons and based on finding a 1 kHz tone which is equally loud; whereas perceived loudness is measured in sone with 1 sone equal to a loudness level of 40 phon at all frequencies. d. Loudness level is measured in sone with 1 sone equal to a loudness level of 40 phon at all frequencies; whereas perceived loudness is measured in phons and based on finding a 1 kHz tone which is equally loud
The highest frequency sound humans can hear is about 20,000 Hz. What is the wavelength of sound in air at this frequency? (hint: the speed of sound, v = 343 m/s)
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The ultra-sound wave propagates in water with the density 1000 kg/m^3 and the sound velocity 1500 m/s. What is the amplitude of the pressure if the average intensity of the wave is 30000 W/m^2? (Give you answer in kilopascals)
At a rock concert, the sound intensity 1.0 m in front of the bank of loudspeakers is 0.10 W/m2. A fan is 30 m from the loudspeakers. Her eardrums have a diameter of 8.4 mm. How much sound energy is transferred to each eardrum in 1.0 second?
(II) What would be the sound level (in dB) of a sound wave in air that corresponds to a displacement amplitude of vibrating air molecules of 0.13 mm at 440 Hz?
A sound wave in a solid has a frequency of 57.0 kHz and a wavelength of 0.333 m. What would be the wave speed, and how much faster is this speed than the speed of sound in air? (The speed of sound in air is 344 m/s.) speed of sound in solid? speed of sound in air?
The cruising sound level in the cabin of a particular jet airliner is 60 dB, but the cabin sound level at take-off is 90 dB. Approximately how many times louder is the cabin take-off sound level compared to the cabin cruising sound level? (Enter a number only -- no symbols).