A mosquito emits a 1000 Hz sound. At a distance of 10.0 m from the mosquito, the sound is at the threshold of hearing. (a) What is the intensity of the sound at the threshold of hearing? (b) What is the acoustical power of the mosquito? (c) What is the intensity and intensity level of the sound when the mosquito is 10.0 cm from an observer’s ear? (d) How many identical mosquitoes would there have to be at a distance of 10.0 m for them to sound as loud as one mosquito at a distance of 10.0 cm?

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 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: A person wears a hearing aid that uniformly increases the intensity level of all audible frequencies…

A: Increase in dB level, B2 - B1 = 30.0 dB The intensity picked up by the hearing aid, I1 = 3.9×10-10…

Q: At a distance of 5 m next to the road, the sound level produced by traffic is measured to be 85 dB.…

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Q: Determine the sound intensity level 30.0 m from a sound source that emits 20.0 W of acoustical power…

A:

Q: The area of a typical eardrum is about 5.0 x 10 m2 (a) Calculate the sound power (the energy per…

A: We have to use some basic formula here

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: A jet engine emits sound uniformly in all directions, radiating an acoustic power of 3.13×105 W.…

A: Given data Radiation of acoustic power is P=3.13×105 W Distance between the source and  the engine…

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 African cicada is the world’s loudest insect, producing a sound intensity level of 107 dB at a…

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Q: The decibel level of a sound is defined to be $100 (7) B= 10 log where I is the intensity of the…

A: A train horn with a decibel rating ofwith a radius of.We need to find the intensity of the train…

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: Problem 6. The low-frequency speaker of a stereo set has a surface area of 0.05 m² and produces 1 W…

A: Given: A=0.05 m2P=1 W

Q: at what distance from the factory (in km) is the intensity level of the whistle sound equal to 12…

A: Given, Factory whistle can be heard up to a distance, D=1.1Km=1100m Threshold of human hearing,…

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

A:

Q: Two students hear the same sound and their eardrums receive the same power from the sound wave. The…

A: Given that First Intensity I1 = 0.79 W/m2 Second intensity I2 = (1.18)(0.79) W/m2 = 1.18I1 Diameter…

Q: A 60 man choir sings with the sound intensity of 70 dB in a 12 m distance from the choir. a) What is…

A: Given information: Here, β is the sound level at r1 distance, r2 is the distance at which the…

Q: A certain source of sound waves radiates uniformly in all directions. At a distance of 20 m from the…

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Q: Taking the threshold of hearing to be 1.00 × 10-1² w/m², determine the level of sound (in decibels)…

A: Given that, The threshold intensity of sound is, We need to find the level of sound that can be…

Q: The sound intensity from a jack hammer breaking concrete is 2.40 W/m2 at a distance of 1.90 m from…

A:

Q: (a) By what factor must the sound intensity be increased toraise the sound intensity level by 13.0…

A: Given data: The change in sound intensity level is ∆β=13.0 dB. Part (a) The expression for the…

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: mplified through a sound system the amplified sound has a sound intensity level that is 12.2 dB…

A: We have givenA sound system the amplified sound has a sound intensity level that is 12.2 dB greater…

Q: A sound has an intensity of 150 W/m2 at a distance of 8.50 m from the source. What is the power of…

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Q: Two students are standing the same distance from a source of sound. The first student receives a…

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Q: the output power of a spherically symmetric sound source is 6.0 W. the decibel level at a distance d…

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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: A point source emits 30.0 W of sound. At 100 m from the source, a small microphone intercepts the…

A: Given information: The power of the sound at the source (P) = 30.0 W The distance at which the…

Q: A source of sound emits 5.0 mW of acoustic power uniformly in all directions. Calculate the…

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Q: An outside loudspeaker (considered a small source) emits sound waves with (a) Find the intensity…

A: (a)Intensity at 12.5 m from the source is 0.053W/m2(b)Intensity level in decibels at this distance…

Q: The intensity

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Q: The African cicada is the world’s loudest insect, producing a sound intensity level of 107 dB at a…

A: The sound level at 0.50 m is 107 dB. So, the sound level at 3 m is,

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

A:

Q: A loud vacuum cleaner outputs 1.5 mW of sound energy. What is the intensity of the sound wave 2.0…

A:

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: A very noisy chain saw operated by a tree surgeon emits a total acoustic power of 34.0 W uniformly…

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Q: A noisy factory machine produces a sound intensity of 1.00 x 10-5 W/m2 when measured 10 m from the…

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