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Unformatted text preview: I n t e n s it y 100 80 60 40 20 0 20 dB 50 Acoustic Perception versus Frequency 100 200 500 1000 2000 F req u en cy Hz In acoustic, sound intensity (I) is often measured in dB scale as 10 Log10 I , where Io is Io the intensity at f = 2000 Hz at which we can barely hear the sound. The above plot shows 2 contours of equal "perception level" when the sound intensity is varied from 20 to 2000 Hz. The 2 contours have I of 0 and 60 dB respectively at f = 2000Hz. Read and try to understand the meaning of this plot. Questions will be followed. ...
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This note was uploaded on 02/06/2012 for the course EECS 70B taught by Professor Henrylee during the Spring '08 term at UC Irvine.
- Spring '08