Suppose that a public-address system emits a 494 Hz sound uniformly in all directions. (a) If the air temperature is 250C (sound travels at 346 m/s), what is the wavelength of this sound? (b) If the intensity at a location 22 m away from the sound source is 3x10-4 W/m2, what is the power of the sound coming from the speaker?

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: A sound of intensity I = 10-6 W/m2 falls on a detector of area A = 7 x 10-5 m2. (This is about the…

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Q: The sound generated by a loudspeaker located in a certain avenue, develops a power of 1mW; If this…

A: The solution is given below

Q: At a distance of 4.65 m from a siren, the sound intensity is 3.30 x 10-2 W/m². Assuming that the…

A: Given:Distance from the source: r=4.65 mIntensity of sound: I=3.30×10-2 W/m2 To calculate:Total…

Q: A typical sound level for a buzzing mosquito is 35 dB, and that of a vacuum cleaner is approximately…

A: Given, sound level for a buzzing mosquito=35dB sound level for vacuum cleaner=65dB

Q: By what factor k must the sound intensity be increased to increase the sound intensity level by 12.9…

A: Given Data, The increment in sound intensity level (∆β)=12.9 dB

Q: A 72.0 dB sound wave strikes an eardrum whose area is 4.60*10^-5 m^2 . (i) What sound intensity (in…

A: (i) Write the formula for the sound intensity in dB.

Q: hè wavé cárries a frequency A sound level 20 m from a loudspeaker is 65 dB, at air temperature of…

A: The sound level from a source is inversely proportional to the distance of propagation. The level is…

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: You are standing 4 m away from a speaker and experience a sound level that is 90 dB. What is the…

A: distance (d) = 4 m sound level = 90 dB

Q: The power output of a certain public address speaker is 2.1 W. Suppose it broadcasts equally in all…

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Q: A source of sound (1000 Hz) emits uniformly in all directions. An observer 2 m from the source…

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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: A siren has a sound power of 4 + 9 watts. Given Iref = 10-12 W/m² and at distance, r = 100 x 4…

A: Given information: The power emitted by the source (P) = 4+9 watts = 13 watts The reference…

Q: If a 7.48 kHz sound source moves at a speed of 11.9 ms-1 toward a listener who moves at a speed of…

A: According to the Doppler's effect, the apparent frequency heard by the listener is, f'=v+v0v-vsf…

Q: Workers around jet aircraft typically wear protective devices over their ears. Assume that the sound…

A: Given data: The sound level of the jet aeroplane is: K=130 dB The effective radius of the human ear…

Q: The source of a sound wave has a power of 9 μW. If it is a point source, what is the sound intensity…

A: Given thatpower=9μw=9×10-6wdistance (r)=35msound intensity…

Q: Loudness (L), in decibels (dB), of a sound of intensity I is defined to be L=10log(I)/(I_(0)) ,…

A: Let IT denotes the intensity of the trombone and LT denotes the loudness of the trombone. Using the…

Q: A sound level meter 5.0 m from a jet engine measures 130.0 dB. The sound power output of the jet…

A: Given: The distance of the sound level meter is r = 5 m The sound intensity in decibel is given as…

Q: A 57-dB sound wave strikes an eardrum whose area is 5.0x10-5m^2. The intensity of the reference…

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Q: A trumpet creates a sound intensity level of 1.15 × 102 dB at a distance of 1.00 m. (a) What is the…

A: Since there are multiple sub-parts posted, we will answer the first three sub-parts for you. If you…

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: A certain noise produces 6.2x10^-4 w/m^2 of power. What is the decibel level of this noise? Given…

A: Given value--- I = 6.2 × 10-4 W/m2 . I0 = 10-12 W/m2 . We have to find--- sound level ?

Q: Sounds from the street below come through an open window measuring 0.75 m by 0.88 m.If the power of…

A: Power, P = 1.2 x 10-6 W Area, A = 0.75 m x 0.88 m

Q: A person is listening to a tone of 500 Hz sitting at a distance of 450 m from the source of the…

A: Given :- n=500 hz, d=450m Introduction:- The time interval between two successive compressions is…

Q: How far must one stand from a 2.2 mW point sound source if the intensity at that location is at the…

A: Given Data : The power of the point source is given as P = 2.2mW.

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: How far must one stand from a 3.8 mW point sound source if the intensity at that location is at the…

A: The threshold intensity for the human ear is 0 DB. that means intensitt is  I = 1.0 x 10-12 w/m2 .

Q: People with good hearing can perceive sounds as low in level as -9.00 dB at a frequency of 2700 Hz.…

A: Formula of intensity in dB is as follows; I(dB)=10 log II0…

Q: The sound level 23.8 m from a loudspeaker is 66.7 dB. What is the rate at which sound energy is…

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Q: Describe how you would calculate the wavelengths of sounds at the extremes of the audible range, 20…

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Q: The scream of a little screaming monster reaches the near-side of a sound-insulating wall with an…

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