824 Reference Manual
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Appendix D Glossary D-1
Allowed Exposure Time (Ti) .......................................................................D-1
Average Sound Level (Lavg).......................................................................D-1
Calibration....................................................................................................D-2
Community Noise Equivalent Level (CNEL, Lden)....................................D-2
Criterion Duration (Tc) ................................................................................D-2
Criterion Sound Exposure (CSE) .................................................................D-3
Criterion Sound Level (Lc) ..........................................................................D-3
Daily Personal Noise Exposure (LEP,d)......................................................D-3
Day-Night Average Sound Level (DNL, Ldn).............................................D-3
Decibel (dB).................................................................................................D-4
Department of Defense Level (LDOD)........................................................D-5
Dose..............................................................................................................D-5
Detector........................................................................................................D-5
Eight Hour Time-Weighted Average Sound Level (L TWA(8)).................D-5
Energy Equivalent Sound Level (Leq).........................................................D-5
Exchange Rate (Q), Exchange Rate Factor (q), Exposure Factor (k) ..........D-6
Far Field .......................................................................................................D-6
Free Field......................................................................................................D-6
Frequency (Hz, rad/sec) ...............................................................................D-7
Frequency Band Pass Filter..........................................................................D-7
Frequency Filter - Weighted ........................................................................D-8
Leq................................................................................................................D-9
Level (dB) ....................................................................................................D-9
Measurement Duration (T).........................................................................D-10
Microphone Guidelines..............................................................................D-10
Near Field...................................................................................................D-12
Noise...........................................................................................................D-13
Noise Dose (D)...........................................................................................D-13
Noise Exposure ..........................................................................................D-13
OSHA Level (LOSHA)..............................................................................D-14
Preamplifier................................................................................................D-14
Projected Noise Dose .................................................................................D-14
Single Event Noise Exposure Level (SENEL, LAX) ................................D-14
Sound..........................................................................................................D-14
Sound Exposure (SE) .................................................................................D-14
Sound Exposure Level (SEL, LET) ...........................................................D-15
Sound Pressure...........................................................................................D-15
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