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Appendix C - Glossary of Special Terms
Pages 78-79

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From page 78...
... : The level of a constant sound that, in the given situation and time period, has the same average sound energy as does a time-varying sound. Specifically, equivalent sound level is the energy-averaged sound pressure level of the individual A-weighted sound pressure levels occurring during the specified time interval [units: dBA]
From page 79...
... Standard octave band center frequencies in the audible range are 31.5, 63, 125, 250, 500, 1000, 2000, 4000, 8000, and 16,000 Hz. One-third octave: The interval between two sound frequencies having a ratio of the cube root of 2.

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