With the installation of noise suppression materials, the noise level in an auditorium was reduced from 93 to 80 decibels. Find the percent decrease in the intensity level of the noise as a result of the installation of these materials.
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With the installation of noise suppression materials, the noise level in an auditorium was reduced from 93 to 80 decibels. Find the percent decrease in the intensity level of the noise as a result of the installation of these materials.
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- (a) If the sound intensity of a person’s whisper if 10-11 W/m2 , what would be the level of intensity due to that whisper? (b) If the person now speaks at an intensity that is 100 times the initial whisper, what would be their current sound intensity levelThe intensity of sound high as a multiple of the average minimum threshold of hearing intensity is related to the decibel level D or loudness of sound according to I=10^D/10 (A) express 10^D/10 using radical notation 10^D/10= (B)The background noise level of a relatively quiet room has a decibel reading of 31. Find the intensity of this noise level round your answer to decimal places (C)a decibel reading of 132 is at the threshold of pain. if I2 is the intensity of the threshold and I1 is the intensity found and part B express or a show I2/I1 as a power of 10 I2/I1=10^ approximate the ratio(round your answer to two decimal places) _____x10^10A sound wave radiates from a speaker in all directions. If the power of the sound source is 200 W, calculate the intensity level in dB of the sound wave 1 km from the speaker. Hint: Presume that the sound waves spread as a sphere (not a hemisphere).
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