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6. A noise source with 0.010 W sound power has a maximum directivity index of 8.0....
7. Sound pressure level measurements were taken in a semi-anechoic chamber at 5 m from the...
7. Sound pressure level measurements were taken in a semi-anechoic chamber at 5 m from the source. A ten point hemispherical array was utilized in this process. The following data was obtained: (1) L,-94 dB, (2) Lp-96 dB, (3) L,-97 dB, (4) L,-93 dB, (5) Lp-92 dB, (6) L,-90 dB, (7) L,-91 dB, (8) L,-95 dB, (9) L,-93 dB, (10) Lp-94 dB From these values a) Determine the sound power level of the noise source b) The maximum directivity index...
The source of a sound wave has a power of 3.88 ?W. If it is a...
The source of a sound wave has a power of 3.88 ?W. If it is a point source, (a) what is the intensity and (b) the sound level at a 5.61 m distance?
The source of a sound wave has a power of 8.29 ?W. If it is a...
The source of a sound wave has a power of 8.29 ?W. If it is a point source, (a) what is the intensity and (b) the sound level at a 3.99 m distance?
Chapter 17, Problem 030 The source of a sound wave has a power of 3.71 ㎶. 1fit is a point source...
Chapter 17, Problem 030 The source of a sound wave has a power of 3.71 ㎶. 1fit is a point source, (a) what is the intensity and (b) the sound level at a 1.37 m distance (a) Number (b) Number Units Units
Chapter 17, Problem 030 The source of a sound wave has a power of 3.71 ㎶. 1fit is a point source, (a) what is the intensity and (b) the sound level at a 1.37 m distance (a) Number...
QUESTION The power output of a sound system is increased by a factor of 25. By...
QUESTION The power output of a sound system is increased by a factor of 25. By what factor should you adjust your distance from the speakers so the sound intensity is the same? PRACTICE IT Use the worked example above to help you solve this problem. A small source emits sound waves with a power output of 82.9 w. (a) Find the intensity 3.05 m from the source. W/m2 (b) At what distance would the intensity be one-fourth as much...
A point source emits 86.9 W of sound isotropically. A small microphone intercepts the sound in...
A point source emits 86.9 W of sound isotropically. A small microphone intercepts the sound in an area of 0.231 cm2, 270 m from the source. Calculate (a) the sound intensity there and (b) the power intercepted by the microphone.
A point source of sound generates a 200 Hz tone. The wave has an intensity of...
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?
At a maximum level of loudness, the power output of a 75-piece orchestra radiated as sound...
At a maximum level of loudness, the power output of a 75-piece orchestra radiated as sound is 72.2 W. What is the intensity of these sound waves to a listener who is sitting 22.3 m from the orchestra? Answer in units of W/m^2
1. What is the sound power level Lw of an acoustic source that produces: a) 40...
1. What is the sound power level Lw of an acoustic source that produces: a) 40 W? b) 2 W? c) 1W? d) 0.005 W?
A speaker at an open-air concert emits 600 W of sound power, radiated equally in all...
A speaker at an open-air concert emits 600 W of sound power, radiated equally in all directions. A.)What is the intensity of the sound 4.50 m from of the speaker? B.) What sound intensity level would you experience there if you did not have any protection for your ears? c.)Earplugs you can buy in the drugstore have a noise reduction rating of 23 decibels. If you are wearing those earplugs, but your friend Phil is not, how far from the...
7. Sound pressure level measurements were taken in a semi-anechoic chamber at 5 m from the source. A ten point hemispherical array was utilized in this process. The following data was obtained: (1) L,-94 dB, (2) Lp-96 dB, (3) L,-97 dB, (4) L,-93 dB, (5) Lp-92 dB, (6) L,-90 dB, (7) L,-91 dB, (8) L,-95 dB, (9) L,-93 dB, (10) Lp-94 dB From these values a) Determine the sound power level of the noise source b) The maximum directivity index...
Chapter 17, Problem 030 The source of a sound wave has a power of 3.71 ㎶. 1fit is a point source, (a) what is the intensity and (b) the sound level at a 1.37 m distance (a) Number (b) Number Units Units
Chapter 17, Problem 030 The source of a sound wave has a power of 3.71 ㎶. 1fit is a point source, (a) what is the intensity and (b) the sound level at a 1.37 m distance (a) Number...
QUESTION The power output of a sound system is increased by a factor of 25. By what factor should you adjust your distance from the speakers so the sound intensity is the same? PRACTICE IT Use the worked example above to help you solve this problem. A small source emits sound waves with a power output of 82.9 w. (a) Find the intensity 3.05 m from the source. W/m2 (b) At what distance would the intensity be one-fourth as much...
1. What is the sound power level Lw of an acoustic source that produces: a) 40 W? b) 2 W? c) 1W? d) 0.005 W?
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