A source of sound (1000 Hz) emits uniformly in all directions. An observer 2 m from the source measures a sound level of 21.4 dB. Calculate the average power output of the source. Answer in units of μW. By what factor will an intensity change for a 3.9 dB increase in the sound level?

Q: A sound wave with intensity 2 x 10 -3 W/m2 is perceived to be modestly loud. Your eardrum is 6 mm in…

A: Intensity of sound (I) = 0.002 Wm2Diameter of eardrum (d) = 6 mm

Q: A bat at rest sends out ultrasonic sound waves at 60.0 kHz and receives them returned from an object…

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Q: sound with a frequency of 144 kHz in a cave where the temperature is 28°C. Assume that air behaves…

A: GivenA bat emits a sound with a frequency,f=144 kHz in a cave where the temperature, T= 28°C.Speed…

Q: A noise level meter reads the sound level at the emergency ward to be 85 dB. What is  sound…

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Q: A sound wave arriving at your ear is transferred to the fluid in the cochlea. If the intensity in…

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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 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: he ear canal is an open-closed tube for sound waves. A person has ear canal 3 cm long. Sound speed…

A: ear canal is open closed tube at open end there is antinode. at closed end there is node. distance…

Q: Diagnostic ultrasound of frequency 3.06 MHz is used to examine tumors in soft tissue. (a) What is…

A: Given data:  Frequency (f) = 3.06 MHz = 3.06×106 Hz Speed of sound in air  = 343 m/s Speed of sound…

Q: A bird is flying directly toward a stationary bird-watcher and emits a frequency of 1280 Hz. The…

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Q: A sound wave has intensity I, measured in units W/m^2. Show how to convert this intensity, I, to dB.

A: Given:-  A sound wave has an intensity I. The unit of intensity is W/m2. Find:-  Show how to convert…

Q: e 30 m away is 100 dB. What is the sound intensity in W/m^

A: Given:- The distance d = 30 m  The level of sound of jet airplane  L = 100 dB  Find:-  The Sound…

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: 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: The sound intensity at a distance of 8.5 m from a siren is 9.5 x 10^-2 W / m^2 . Determine the total…

A: The equation for the radiated power by the sound source is Power = Intensity of the sound*Area

Q: 49.4-Hz sound wave is barely audible at a sound intensity level of 60.0 dB. The density of air at…

A: (given) Speed (v) of sound in air at 20.0°C = 343 m/s             Density (ρ) of air at 20.0°C =…

Q: What should be the power output of a speaker in order to produce a sound wave that has pressure…

A: p=190 mPa=190×10-3 Par=6.75 mρ=1.22 kg/m3

Q: A source of sound has an intensity I1 and when its sound level is measured at a fixed distance the…

A: The initial sound intensity of the source is The final sound intensity of the source is The…

Q: Scientists in a laboratory produce a sound wave in a simulated environment (air) with a velocity of…

A: We know that   v = 331m/s + 0.6m/s/C * T     here T is in celcius

Q: A typical adult ear has a surface area of 2.1×10-3m2. The sound intensity during a normal…

A: Area, A = 2.1×10-3 m²Intensity, I = 3.2×10-6 W/m²Power, P = ?

Q: A sound wave has a frequency of 632 Hz in air and a wavelength of 0.51 m. What is the temperature of…

A: Given, frequency = 632 Hz wavelength = 0.51 m We know, c is the speed of sound

Q: L = 10 log (7) where I is the intensity of sound in watts per square metre 10-¹2 W/m². Determine the…

A: Given that:L=10 log (IIo)Io=10-12 W/m2L=100 dB

Q: You work at a building site and the noise level has been measured at 95 dB. You need to wear…

A:

Q: A sound wave arriving at your ear is transferred to the fluid in the cochlea. If the intensity in…

A:

Q: A bird is flying directly toward a stationary bird-watcher and emits a frequency of 1370 Hz. The…

A: Data Given ,  Frequency emits by bird ( fs ) = 1370 Hz Frequency hears by bird watcher ( f0 ) = 1430…

Q: A 3.00 m long air column is open at both ends. The frequency of a certain harmonic is 410 Hz, and…

A: Since you have asked multiple questions, we will solve the first question for you. If you want any…

Q: The table gives an estimate for the sound intensity of a whisper at 1.0 m. What is the sound…

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Q: Sound travels at a speed of v = 1570 m/s in water. While underwater a student hears a f = 1.5 kHz…

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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: Two loudspeakers produce the same pure-tone sound (that is, same frequency). A sound detector is…

A: GIVEN: distance of sound detector from loudspeakers (l1) = 5m, l2 = 5.40 m speed of sound (v) =…

Q: an ultrasonic scan uses the echo waves coming from something moving inside the body and the waves…

A: In an ultrasound scan, we can calculate the beat frequency using the Doppler effect formula for…

Q: The intensity of a sound wave emitted by a radio is 5.00 µW/m2. What is the sound level (in dB)?

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Q: The intensity of a sound wave emitted by a radio is 5.00 µW/m2. What is the sound level (in dB)?

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Q: he amplitude of a sound wave is measured in terms of its maximum gauge pressure. By what factor does…

A: Given: The sound level is ∆β=36 dB. The expression for sound level is: ∆β=10 dBlog10A2A12 Here, A1…

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

A: Answer:-  The hearing aid increase the intensity of sound level 34.2 dB or has a gain 34.2 dB . The…

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: Sound is detected when a sound wave causes the eardrum to vibrate. Typically, the diameter of the…

A: Given:The diameter of the ear is .The intensity of the sound is .

Q: A bat emits a sound whose frequency is 83.2 kHz83.2 kHz. The speed of sound in air at 20.0o C is 343…

A:

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 =…