HW2-SoundIntensity&Decibels

HW2-SoundIntensity&Decibels - I at each of the...

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Department of Architecture University of Florida ARC 4620 Environmental Technology 2 Glenn Sweitzer Fall 2003 Bumjun Kim, Youngmin Kwon, Todd Gabbard Assignment 2: SOUND INTENSITY AND DECIBELS Due in Lab, Tuesday, September 16, 2003. This assignment focuses on using the distance equation and logarithms to compute sound intensities and sound intensity levels. Show all your calculation works. 1. What is the Sound Intensity Level (L I ) of Sound Intensity (I) of 10 -6 w/m 2 ? 2. What is the Sound Intensity (I) of a source producing a Sound Intensity Level (L I ) of 90 dB? 3. If the Sound Intensity (I) of a single person speaking is measured as 10 -4 w/m 2 at a distance of 10 feet, what is the intensity at 20 feet? At 40 feet? 4. What is the Sound Intensity Level (L
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Unformatted text preview: I ) at each of the three locations specified in question 3? 5. The Sound Intensity Level (L I1 ) of a trombone is 76 dB. What is the Sound Intensity Level (L I2 ) of 2 trombones. What is the perceptual increase in loudness? 6. What is the Sound Intensity Level (L I ) of 76 trombones? What is the perceptual increase in loudness? 7. Discuss the (frequency and sound intensity level) range of human hearing and what is considered a comfortable range of ambient or background sound levels. There is a good review of working with logarithms in the Stein and Reynolds text on pages 1497 to 1502. Note that we are using 10-12 w/m 2 for the reference intensity in the course, while the text uses 10-16 w/cm 2 ....
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This note was uploaded on 08/27/2011 for the course ARC 4620 taught by Professor Staff during the Fall '08 term at University of Florida.

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