A 200 Hz source radiates sound that produces a SPL of 85 dB at a distance...
A constant output loudspeaker produces a sound level of 97 dB at 10 feet when located at the corner of two walls. What will be the sound level at the same distance if it is placed in an open area? a. 91 b. 94 d. 103 106 e. f. None of the above c. 97 A 200 Hz source radiates sound that produces a SPL of 85 dB at a distance of 1 meter. Is this SPL in the near-field?...
A spherical source radiates sound uniformly in all directions. At a distance of 14 m, the sound intensity level is 90 dB. What power is radiated by this source?
A spherical source radiates sound uniformly in all directions. At a distance of 9 m, the sound intensity level is 100 dB. What power is radiated by this source?
A point source of sound generates a 200 Hz tone. The wave has an intensity of 2.2×10−8 W/m2 at a distance of 3 m from the source. Find the total sound power at the source. At what distance from the source is the decibel level below 15 dB? What is the intensity of the sound at this distance?
title: ergonomics A point source in a free field (no reflected sound waves) produces a sound pressure level of 90 dB at a distance of 1 meter, and the sound pressure level is 84 dB at 2 meters. How far from the point source would the sound pressure level be 78db? Select one: O a. 3 meters b. 4 meters c. 5 meters d. 6 meters e. 7 meters f. 8 meters g. 9 meters h. 10 meters OOO OOO...
A mosquito located two meters away produces a sound intensity of 85 dB. How much would the intensity be if there were 200 mosquitoes at the same distance? You can assume that the sound is equally distributed in all directions.
A plane wave at 2,000 Hz has a sound intensity level of 75 dB. What is Prms in Pa? d. 3.6x10 5.1x10-1 f. None of the above a. 3.6x10-2 b. 1.1x10-1 c. 2.3x10-1 e. 0. A plane wave at 1,050 Hz in air at room temperature has a sound intensity level of 60 dB. What is the wavelength in ft? a. 0.27 b. 0.33 d. 0.90 1.07 e. c. 0.78 f. None of the above A plane wave at 2,000...
1)The sound level at a distance of 1.82 m from a source is 146 dB. At what distance will the sound level be 50.7 dB? Answer in units of m. 2)At what distance will the sound level be 7.22 dB? Answer in units of m.
The sound from a trumpet radiates uniformly in all directions in air with a temperature of 20∘C. At a distance of 4.98 m from the trumpet the sound intensity level is 56.0 dB. The frequency is 586 Hz. Use 344 m/s for the speed of sound in air, 1.20 kg/m3 for the density of air, and 1.00×10−12 W/m2 for the reference intensity. a) What is the pressure amplitude at this distance? b) What is the displacement amplitude? Use 1.42×105 Pa...
how to solve it ? D42. If the distance from a source of sound increases by 1 meter, the sound level is decreased by 2 dB. Assume the loudspeaker that is emitting this sound emits sound in all directions. What is the original distance from the sound source? (Ans: 3.86 m)