A city police siren radiates sound intensity of 3.34W/m2 which can be heard at an exact...
A city police siren radiates sound intensity of 3.54W/m2 which can be heard at an exact distance of 455 m away. At what sound intensity level can it be heard 77.3 m away from the siren? Answer:
At a distance of 5.02 m from a siren, the sound intensity is 3.48 × 10-2 W/m2. Assuming that the siren radiates sound uniformly in all directions, find the total power radiated.
Q2. A siren radiates sound uniformly in all directions. A person standing a distance L from the siren regsiters a sound intensity level of 115 dB but a person standing twice that distance registers an intensity of 109 dB. What is the ratio of the intensities at those points. What will the sound intensity level at a distance of 12 L be?
(10 pts) A police car siren emits 120W of sound at a frequency of 1200Hz a. What is the intensity of the sound in decibels at a distance of 500m from the siren? b. If the police car, travelling east at 200 km/hr chases a speeding motorist going east at 140 km/hr. What is the siren frequency as heard by the motorist? 8. A 4.00 mm think glass window has thermal conductivity k 1.00 W/(m K). What is the rate...
A sound wave from a siren has an intensity of 106.1 W/m2 at a certain point, and a second sound wave from a nearby ambulance has an intensity level 11 dB greater than the siren's sound wave at the same point. What is the intensity level of the sound wave due to the ambulance? Answer in dB
1 Review The sound intensity 53.0 m from a wailing tornado siren is 0.200 W/m² Part A What is the intensity at 1200 m ? Express your answer with the appropriate units. HÅR O O ? Value Units Submit Request Answer Part B luw/mº. Estimate the maximum The weakest intensity likely to be heard over background noise is distance at which the siren can be heard. Express your answer with the appropriate units. CHÅR O ? Value Units Submit Request...
A sound wave from a siren has an intensity of 106.4 W/m2 at a certain point, and a second sound wave from a nearby ambulance has an intensity level 9 dB greater than the siren's sound wave at the same point. What is the intensity level of the sound wave due to the ambulance? dB
A siren at a distance of 30. m produces a sound intensity of 1.0x10^-2 W/m^2. What sound level is expected from this siren at that location? A siren at a distance of 30. m produces a sound intensity of 1.0x10^-2 W/m^2. What sound level is expected from this siren at that location? 1.0x10^-1 dB 1.0 db 1.0x10^-2 dB 1.0x10^2 dB 1.0x10^1 dB
A jet airplane has an intensity of 107 J/(m2 · s) when heard at a distance of 25 m. (a) What is the maximum sound intensity (in J/(m2 · s)) heard by a person on the ground when the airplane cruises 12,000 m above the ground? J/(m2 · s) (b) What is the intensity level (IL) heard (in dB)? dB
KHW16 Item 13 The sound intensity 44.0 m from a wailing tornado siren is 0.150 W/m2 Part A What is the intensity at 1300 m ? Express your answer with the appropriate units alue Units Submit