5-32 824 Reference Manual 9/29/09
Exposure Display-a The Exposure-a display consists of seven major
components:
• Display label
• Dose
• Projected dose
• Time Weighted Average
• Sound Exposure Level
• Elapsed Time
The Exposure-a display is shown below:
The following explains each of the display’s components:
Display label - This shows the current display (for example,
“SLM Exposure-a”).
Dose - By definition, a person receives 100% dose when
exposed to a noise having a TWA equal to the selected
criterion level for a time equal to the criterion time (usually
eight hours). This corresponds to the maximum safe noise
exposure. Exposures at higher levels will result in a 100%
dose in less time; or if exposure continues, the exposure will
exceed 100% dose.
Projected dose - Projected dose is the dose that will occur if
current noise levels continue for the entire criterion time.
Display label
Sound exposure level
Time weighted average
Dose
Projected Dose
Elapsed Time
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