Give a detailed and specific description of the human perception of Loudness.
Q: A noisy machine in a factory produces a sound level of 100 dB. Two identical machines are added to…
A: Decibel is a logarithmic scale thus the values cannot simply be added. Thus, we will first convert…
Q: What is the sound level (in decibels) of a sound whose intensity is 7.5 x 108 w/m2? 6.7 dB 7.5 dB 80…
A: Given : sound intensity , I = 7.5 × 10-8 W/m2
Q: The noise a lawn mower produces is 80 dB. How much noise is from 12 identical lawn mowers?
A: Noise = 80dB Let I is the intensity of one lawn mowers , Then for 12 lawn mowers, the intensity is…
Q: The velocity of sound in air is approximately 330 m/s. a) Given that, what is the frequency of a…
A: a ) Given :- V= 330 m/s λ = 16.5 m V = f * λ 330 = f * 16.5 f = 330/16.5 f= 20 Hz frequency of…
Q: A brand of earplugs reduces the sound intensity level by 27 dB. By what factor do these earplugs…
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Q: A 500-Hz sound travels through pure oxygen. The wavelength of the sound is measured to be 0.65 m.…
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Q: The area of a typical eardrum is about 5.0 x 10-5 m2. Calculate the sound power (the energy per…
A: (a)Formula to calculate the power incident on the eardrum is,
Q: When a person wears a hearing aid, the sound intensity level increases by 24.4 dB. By what factor…
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Q: The sound level measured in a room by a person watching a movie on a home theater system varies from…
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Q: At close proximity, rustling leaves have a sound intensity of about 1.2×10-11 W per m2. At what…
A: Given: I1 = 1.2 x 10-11 W/m2 I2 = 1 x 10-12 W/m2 r1 = 1 m
Q: he noise a lawn mower produces is 80 dB. How much noise is from 10 identical lawn mowers?
A: Given: The sound level of the lawnmower is 80 dB. The number of identical lawnmowers is 10.
Q: A typical sound level for a buzzing mosquito is 39 dB, and that of a vacuum cleaner is approximately…
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Q: A train travelling at 14.77 m/s is approaching a stationary observer, and sounding a warning horn at…
A: Given Speed of sound = 324.1 m/s Frequency of source =369.5 Hz Speed of source =14.77 m/s
Q: The frequency range of human singing extends from about C = 65 Hz for a low bass to about C = 1046…
A: Frequency, wavelength and speed of sound are related as, v=fλ Since, speed of sound is fixed for…
Q: The sound intensity 9 m from an isotropically radiating point source is 0.78 W/m². What is the power…
A: Since the point is 9 m from the point source, so, the area of sphere covered is A =πr2 ⇒4×π×92 =…
Q: An observer in a car moving at 14.4 m/s is receding from a stationary sound source which is sounding…
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Q: The noise a lawn mower produces is 80 dB. How much noise is from 2 identical lawn mowers?
A: Given: β1=80 dB
Q: Source Observer Frequency Heard O speed [ Select ] O speed [ Select ] O speed [ Select ] [ Select ]…
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Q: The warning tag on a lawn mower states that it produces noise at a level of 99.0 dB. What is this in…
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Q: In a pig-calling contest, a caller produces a sound with an intensity level of 107 dB. How many such…
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Q: 1. A machine in a factory emits sound of intensity 71 dB. Calculate the resulting sound intensity if…
A: Given: The intensity of sound = 71 DB The second identical machine is placed beside it. Resulting…
Q: The warning tag on a lawn mower states that it produces noise at a level of 99.0 dB. What is this in…
A: We know that the formula of noise at a level is given as βdB= 10log10II0------ eq 1 here I0 is the…
Q: the wavelength of ultrasound is 1.9cm or less. What is the frequency of it? Take the sound speed in…
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Q: A 460-Hz sound travels through pure neon. The wavelength of the sound is measured to be 0.95 m.…
A: We know that If a wave have frequency f and wavelength
Q: What are the factors that determines loudness of a sound?
A: Loudness of the sound depends on the intensity of the sound. Loudness of the sound is calculated in…
Q: The frequency of the fourth harmonic in an open pipe is 800 Hz. What is the length of the pipe?
A: Given data :- frequency of fourth harmonic f4 = 800 Hz taking speed of sound in air v = 330 m/s
Q: A ukulele has 4 tuning pegs. If you turn them the sound of the strings change. Explain this in terms…
A: Number of tuning pegs in ukulele = 4 On turning the strings, the sound change in ukelele.
Q: A machine used in a hospital has an operating sound intensity level of 72 dB. If 10 of these…
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Q: 4) The speed of sound in air on a given day is 340 m/s. If a person shouts at a building and hears…
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