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
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A: Given Data, The increment in sound intensity level (∆β)=12.9 dB
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A: Increase in dB level, B2 - B1 = 30.0 dB The intensity picked up by the hearing aid, I1 = 3.9×10-10…
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A: Given data: Frequency (f) = 3.06 MHz = 3.06×106 Hz Speed of sound in air = 343 m/s Speed of sound…
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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…
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A: The equation for the radiated power by the sound source is Power = Intensity of the sound*Area
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A: (given) Speed (v) of sound in air at 20.0°C = 343 m/s Density (ρ) of air at 20.0°C =…
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A: p=190 mPa=190×10-3 Par=6.75 mρ=1.22 kg/m3
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A: The initial sound intensity of the source is The final sound intensity of the source is The…
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A: We know that v = 331m/s + 0.6m/s/C * T here T is in celcius
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A: Area, A = 2.1×10-3 m²Intensity, I = 3.2×10-6 W/m²Power, P = ?
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A: Given, frequency = 632 Hz wavelength = 0.51 m We know, c is the speed of sound
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A: Given that:L=10 log (IIo)Io=10-12 W/m2L=100 dB
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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…
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A: Since you have asked multiple questions, we will solve the first question for you. If you want any…
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A: GIVEN: distance of sound detector from loudspeakers (l1) = 5m, l2 = 5.40 m speed of sound (v) =…
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A: Given: The sound level is ∆β=36 dB. The expression for sound level is: ∆β=10 dBlog10A2A12 Here, A1…
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A: Given, Factory whistle can be heard up to a distance, D=1.1Km=1100m Threshold of human hearing,…
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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…
A:
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: 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 =…
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- A sound wave is traveling in seawater, where the adiabatic bulk modulus and density are 2.31 x 10⁹ Pa and 1025 kg/m³, respectively. The wavelength of the sound is 3.34 m. A tuning fork is struck under water and vibrates at 440.0 Hz. What would be the beat frequency heard by an underwater swimmer? fbeat = MOThe eardrum, which transmits sound vibrations to the sensory organs of the inner ear, lies at the end of the ear canal. For adults, the ear canal is about 2.6 cm in length. Frequency standing waves that can occur in the ear canal that are within the range of human hearing. Assume the speed of sound in the air of the ear canal to be 334 m/s. Write your answer with 3 sig fig. What is the lowest natural frequency for standing wave to be heard by humain?_____Hz What is the third lowest natural frequency for standing wave to be heard by humain?____Hz What is the second lowest natural frequency for standing wave to be heard by humain?_____HzA sound source creates a sound intensity at a certain distance. If the sound intensity is increased by a factor of 8.1, by how many decibels is the sound intensity level increased?
- A fire truck is moving at 33 m/s, and a car in front of the truck is moving in the same direction at 43 m/s. If a 193-Hz siren blares from the truck, what frequency is heard by the driver of the car at v=343 m/s? No need to include the unit. Write your answer in whole numbers.Please have answers computer typed.The warning tag on a lawn mower states that it produces noise at a level of 99.0 dB. What is this in W/m2?
- A sound wave at 20° C has pressure amplitude of 2.00 Pa. The density of air is 1.2 Kg/m and the threshold for hearing intensity is 1012 w/m2. The speed of sound in air is 344 m/s. (a) Find the intensity of the sound wave. (b) Find the intensity in decibels.a noise level meter reads the sound level in a room to be 85 dB. What is the intensity of sound in W/m^2?A typical adult ear has a surface area of 1.36 × 10-3 m2. The sound intensity during a normal conversation is about 3.78 × 10-6 W/m2 at the listener's ear. Assume that the sound strikes the surface of the ear perpendicularly. How much power is intercepted by the ear? number units
- A 38.0-Hz sound wave is barely audible at a sound intensity level of 60.0 dB. The density of air at 20.0°C is 1.20 kg/m3. Speed of sound in air at 20.0°C is 343 m/s. What is the displacement amplitude of a 38.0-Hz sound wave? What is the ratio of the displacement amplitude to the average distance between molecules in air at room temperature, about 3.00 nm?A loud vacuum cleaner outputs 1.5 mW of sound energy. What is the intensity of the sound wave 2.0 meters away? (Give your answer in ?μW/m2.)A sound wave arriving at your ear is transferred to the fluid in the cochlea. If the intensity in the fluid is 0.410 times that in air and the frequency is the same as for the wave in air, what will be the ratio of the pressure amplitude of the wave in air to that in the fluid? Approximate the fluid as having the same values of density and speed of sound as water. Speed of sound in dry air (20.0°C, 1.00 atm) is 343 m/s, density of dry air (at STP) is 1.29 kg/m3, density of water is 1000 kg/m3, and speed of sound in water is 1493 m/s.