MINIATURE SOUND LEVEL DOSIMETER
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United States of America Patent
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Issued Date -
May 22, 2008
app pub date -
Sep 20, 2007
filing date -
Nov 16, 2006
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
Described is a miniature sound level dosimeter that is less expensive and more user-friendly than conventional sound level dosimeters. The dosimeter includes a frequency-weighting circuit, an envelope follower circuit, an analog-to-digital converter and a microcontroller. The frequency-weighting circuit applies a predetermined frequency-weighting, such as A-weighting, to an electrical signal indicative of the detected sound level to generate a frequency-weighted signal. An analog envelope signal is generated in response to the frequency-weighted signal and converted to a digital output signal. The microcontroller determines the sound dose in response to the digital output signal and a time interval.
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