The loss in a cable is usually defined in decibels per kilometer (dB/km). If the signal at the beginning of a cable with -0.3 dB /km has a power of 2 mW, what is the power of the signal at 5 km?

Q: How to convert 111 dBSIL to mW/m2

A: Given, Sound level = 111 dBSIL To convert dBSIL to W/m2 we use this conversion as 1 dB = 1 × 10-12…

Q: An isotropically radiating point source of sound has a power output of 903 W. What is the sound…

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Q: The low-frequency speaker of a stereo set has a surface area of 0.06 m2 and produces 1 W of…

A: Given :      Surface area, A1  = 0.06 m 2      Power, P = 1 W     Intensity, I = 0.24 Wm2

Q: The density of a muscle is 1.3 g/cm3 and the sound velocity in it is 1.5 km/s. The acoustic…

A: Density, ρ = 1.3 g/cm3 = 1.3×103 kg/m3 Velocity, v = 1.5 km/s = 1500 m/s

Q: A graph as been drawn between -and from the above tabulated values. 1/u Vs 1/v Graph 0.100 0.095…

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Q: A loudspeaker has a frequency of 1000Hz to 2000Hz. An open open pipe is near the loudspeaker. The…

A: Given f=1000-2000 Hz L=45.7cm v=344 m/s

Q: How far must one stand from a 4 mW point sound source if the intensity at that location is at the…

A: Given, Power = 4mW

Q: Sound Power Level, Lw is measured as the total acoustic power emitted by a source in all directions…

A: Given:reference value of power, Po = 10-12 Wpower emitted by the siren, P = 2TU Where T = 9 and U =…

Q: A sound wave having a frequency of 253 Hz travels through air at 20 °C. The decibel level at a…

A: Given  Distance r1=32.2 m β1=77.1 dB r2=32.2-14.1=18.1 m

Q: (a) What is the intensity in watts per meter squared of a just barely audible 200-Hz sound? (b)…

A: At bare minimum audible level for a given frequency is plotted in the figure below,     The formula…

Q: What is the decibel level of a sound that is three times as intense as a 83.2 dB sound? (b) What is…

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Q: An individual can hear sound waves from 20 Hz to 20 kHz. If the speed of sound is 340 m/s, what is…

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Q: a) Find the size of the smallest detail observable in human tissue with 50.5 MHz ultrasound. (Use…

A: In this question we have to find the  size of the smallest detail, the effective penetration depth…

Q: A 100 milliwatt signal is sent over a 1 km long cable, which attenuates the signal 0.04 dB/meter.…

A: Given : Power of signal sent over 1km, Pi = 100 mW Attenuation per meter, k = 0.04 dB/m 1km = 1000 m…

Q: I The loudness, L, in decibels(dB), is given by the formula L = 10 • log where l = 10-1² W/m². The…

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Q: 10-9. The following noise spectrum was obtained from a jet aircraft flying overhead at an altitude…

A: Your answer is 108dB

Q: Problem 1: An audio engineer takes decibel readings at distances of r = 14 m and r, = 22 m from a…

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Q: An audio engineer takes decibel readings at distances of r1=11m and r2=23m from a concert stage…

A: Part (a) Sound level is given by: β= 10*log (I1/I0) β = Sound level of at r1 distance from speaker =…

Q: The average depth of penetration of an ultra-sound wave of the frequency f = 800 kHz in tissue is 4…

A: Given The initial intensity of the wave is I0=10 W/m2. The skin depth or average depth of…

Q: How to convert 106 dBSWL to W

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Q: 10 m from a speaker sound intensity level 60 dB.  (a) What is the power of the speaker? (b) What is…

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Q: The speed of sound at 0°C in open air is 331.3m/sec. At what temperature would the wavelength of a…

A: frequency = f = 440 Hz wavelength = λ = 0.82 m

Q: A particular jet liner has a cabin noise level of 10^-4.96 W/m. What is this intensity in decibels?…

A: Noise level is I=10-4.96 W/m2 Note: Reference intensity is I0=10-12 W/m2 logmn=nlogm log1010=1 Find:…

Q: With the installation of noise suppression materials, the noise level in an auditorium was reduced…

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Q: Loudspeakers can produce intense sounds with surprisingly small energy input in spite of their low…

A: Sound intensity level = β = 85.1 dB Diameter of the speaker = d = 15.5 cm = 15.5 cm×1 m100 cm=0.155…

Q: Find the intensity level in decibels for sound with intensity 2.4 times 10 to the negative 6 power…

A: The level of sound or loudness may be expressed in decibels above the standard threshold of hearing…

Q: An echo returned in 2s. What is the distance of the reflecting surface from the source, given that…

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Q: The sound intensity level of 9 m from a large power saw is 89 dB. At what distance(in meters) will…

A: (given) Sound intensity level at distance (r1)= 9 m Power saw β1 = 89 dB More tolerable intensity…

Q: What is the length of an closed-pipe resonator with a fundamental frequency of 400.0Hz? (Assume the…

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Q: How to convert 0.5 µW to dBSIL? (1 W = 1 000 000 µW).

A: Given thatdB=10 logPoutPindBSIL=?Pin=10-12 W/m2Pout=0.5 μ W/m2 As,  1μ W=10-6 Wso, Pout=5×10-7 W/m2

Q: Fifty metres from an alarm the sound level is 103 dB. To what sound intensity does this correspond…

A: Given, Loudness,

Q: The intensity

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Q: A signal no. 1 storm is up in your area, and the weather sirens are turned on to give warning to the…

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Q: A small source emits sound waves with a power output of 95 W. Take I0 = 1 x 10-12 W/m2. Find the…

A: Given : Sound wave's power →P=95 W Initial intensity →I0=1×10-12 W/m2 Distance →r=700 cm=7 m Sound…

Q: Sound with intensity larger than 120 dB appears painful to a person. A speaker delivers 280 W of…

A: Given information: Sound intensity level painful to a person SIL=120 dB. Audio output of a speaker…

Q: The motion detectors used in our labs are ultrasonic, operating at 25,000 Hz.  In a lab room where…

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Q: A sound wave travels through air at 20 °C. The decibel level at a distance of 19.4 m from the source…

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Q: The intensity of sound high as a multiple of the average minimum threshold of hearing intensity is…

A: Given data: Intensity of sound, I=10D10 Decibel reading, D=31