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(10%) Problem 9: Suppose 1.75 x 102 W/m² ultrasound is being used in medical diagnostics. *...
14.3 a) If the sound intensity is 2.73 x 105 W/m', what is the intensity level in decibels? b) If the sound intensity is 7.45 x 107 W/m2, what is the intensity level in decibels?
Please answer both questions carefully
(a) Determine the intensity of sound in W/m2 reaching a person sitting at a distance of 5 m from a 200-W loud speaker. (b) The level of sound for threshold of hearing with intensity given by 1,-10x 10 given by 1,- 1.0x 10-12 W/m Wm is 0 decibel. Find the intensity of sound for a level of 50 decibels hi threshold of hearing.
At a concert, a person is standing 2.00 m from a speaker, where the sound intensity is 0.120 W/m? Another person is 32,0 m from the speaker. Assume the sound is emitted equally in all directions to -1.00 x 10-12 W/m2 a) What is the intensity in Wim? at 32.0 m from the speaker? b) What is the sound level in dB at 32.0 m from the speaker? ОА The intensity is 7.50 x 10 wim? DB The intensity is...
Part A W/m What is the sound level of a sound whose intensity is 5.5 x 10 W/m ? The intensity of the reference level required to determine the sound level is 10 x 10 Express your answer to two significant figures and include the appropriate units. 8 = Value Units
The sound intensity in the auditorium during class is 3.2 x 10^-6 W/m^2. What is the sound intensity after class if the sound level drops by 25dB.
Use the worked example above to help you solve this problem. A noisy grinding machine in a factory produces a sound intensity of 1.97 x 10-3 W/m². (a) Calculate the decibel level of this machine. dB (b) Calculate the new decibel level when a second, identical machine is added to the factor (c) A certain number of additional such machines are put into operation alongside these two. When all the machines are running at the same time the decibel level...
9. The sound intensity of a conversation at a distance of 3.0 m is 1.1 x 10-7 W / m ^ 2. Determine the intensity at a distance of 4.0 m. Presume that the sound spreads evenly in all directions.
DETR A sound wave, of frequency 17 x 10 1tz and intensity 3 x 10-3 w/ travels in a medium with a velocity of 340 m/s (a) What 'is the wavelength of the waye in this megdium (b) If the intensity level is increased by 30 db, what is the inter the new wave? (o II this wave is produced by a siring fixed on both ends as it harmonic, what is the length of the string?
Part A What is the sound level of a sound whose intensity is 4.5 x 10 W/m2? The intensity of the reference level required to determine the sound level is 1.0 x 10-12 W/m? Express your answer to two significant figures and include the appropriate units. B Value Units Submit My Answers Give Up
A person standing 1.05 m from a portable speaker hears its sound at an intensity of 6.30 x 10-3 W/m2 a) Find the corresponding decibel level. (Answer in dB). b) Find the sound intensity (in W/m2 ) at a distance of 42.0 m, assuming the sound propagates as a spherical wave. ( answer in W/m2 ). c) Find the decibel level at a distance of 42.0 m. (answer in dB).