A rock group is playing in a bar. Sound emerging from the door spreads uniformly in...
A rock group is playing in a bar. Sound emerging from the door spreads uniformly in all directions. The intensity level of the music is 126 dB at a distance of 2.47 m from the door. At what distance is the music just barely audible to a person with a normal threshold of hearing? Disregard absorption. Answer in units of m.
Homework Answers
Use the equation for sound level and the relation of intensity
with distance where intensity is inversely proportional to square
of distance to find the required solution as shown below
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A rock group is playing in a bar. Sound emerging from the door
spreads uniformly in...
012 10.0 points A rock group is playing in a bar. Sound emerging from the door...
012 10.0 points A rock group is playing in a bar. Sound emerging from the door spreads uniformly in all directions. The intensity level of the music is 109 dB at a distance of 4.74 m from the door At what distance is the music just barely audible to a person with a normal threshold of hearing? Disregard absorption. Answer in units of m
the answers were wrong the first time this was answered! 012 10.0 points A rock group...
the answers were wrong the first time this was answered!
012 10.0 points A rock group is playing in a bar. iSound emerging from the door spreads uniformly in all directions. The intensity level of the music is 72.6 dB at a distance of 4.72 m from the door. At what distance is the music just barely dible to a person with a normal threshold of hearing? Disregard absorption. Answer in units of m.
A woman stands a distance d from a loud motor that emits sound uniformly in all...
A woman stands a distance d from a loud motor that emits sound uniformly in all directions. The sound intensity at her position is an uncomfortable 4.0×10-3 W/m2. At a distance 3.2 times as far from the motor, what are (a) the sound intensity and (b) the sound intensity level relative to the threshold of hearing?
A woman stands a distance d from a loud motor that emits sound uniformly in all...
A woman stands a distance d from a loud motor that emits sound uniformly in all directions. The sound intensity at her position is an uncomfortable 3.4×10-3 W/m2. At a distance 2.5 times as far from the motor, what are (a) the sound intensity and (b) the sound intensity level relative to the threshold of hearing?
A woman stands a distance d from a loud motor that emits sound uniformly in all directions. The sound intensity at her...
A woman stands a distance d from a loud motor that emits sound uniformly in all directions. The sound intensity at her position is an uncomfortable 3.2 *10-3 W/m2. At a position twice as far from the motor, calculate the following: (a) the sound intensity in W/m2 (b) the sound intensity level relative to the threshold of hearing
Q2. A siren radiates sound uniformly in all directions. A person standing a distance L from...
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?
x] Incorrect A woman stands a distance d from a loud motor that emits sound uniformly...
x] Incorrect A woman stands a distance d from a loud motor that emits sound uniformly in all directions. The sound intensity at her position is an uncomfortable 2.8x10-3 W/m2. At a distance 1.9 times as far from the motor, what are (a) the sound intensity and (b) the sound intensity level relative to the threshold of hearing? .001 (a) Number Units X (b) Number Units
The sound from a trumpet radiates uniformly in all directions in air with a temperature of...
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...
The sound from a trumpet radiates uniformly in all directions in air with a temperature of...
The sound from a trumpet radiates uniformly in all directions in air with a temperature of 20∘C. At a distance of 4.90 m from the trumpet the sound intensity level is 49.0 dB . The frequency is 584 Hz . Part A What is the pressure amplitude at this distance? 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. Part B What is the displacement...
Two boys are whispering (one at a time) in the library. The radiated sound power from...
Two boys are whispering (one at a time) in the library. The radiated sound power from one boy's mouth is 1.2 × 10–9 W; and it spreads out uniformly in all directions. What is the minimum distance the boys must be away from the librarian so that she will not be able to hear them? The threshold of hearing for the librarian is 1.00 × 10–12 W/m2.
012 10.0 points A rock group is playing in a bar. Sound emerging from the door spreads uniformly in all directions. The intensity level of the music is 109 dB at a distance of 4.74 m from the door At what distance is the music just barely audible to a person with a normal threshold of hearing? Disregard absorption. Answer in units of m
the answers were wrong the first time this was answered!
012 10.0 points A rock group is playing in a bar. iSound emerging from the door spreads uniformly in all directions. The intensity level of the music is 72.6 dB at a distance of 4.72 m from the door. At what distance is the music just barely dible to a person with a normal threshold of hearing? Disregard absorption. Answer in units of m.
x] Incorrect A woman stands a distance d from a loud motor that emits sound uniformly in all directions. The sound intensity at her position is an uncomfortable 2.8x10-3 W/m2. At a distance 1.9 times as far from the motor, what are (a) the sound intensity and (b) the sound intensity level relative to the threshold of hearing? .001 (a) Number Units X (b) Number Units
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