Abstract： AS/NZS 1269.1:2005 pdf download.Occupational noise management Part 1: Measurement and assessment of noise immission and exposure. 3.7 Reference sound source A deice which generates a sinusoidal sound pressure of specified level and frequenc...

AS/NZS 1269.1:2005 pdf download.Occupational noise management Part 1: Measurement and assessment of noise immission and exposure.

3.7 Reference sound source

A deice which generates a sinusoidal sound pressure of specified level and frequency when used with a particular model of

microphone in a specified manner.

3.8 Representative working day

A working day during which the noise exposure is representative of the person’s long-term occupational noise exposure.

NOTE: The representative working day should be made up of segments proportioned in accordance with the perso&s long-tenn

occupational noise exposure in such a manner that where the exposures differ markedly from day to day. the segmens utilized should take such variability into account.

3.9 Sound level or weighted sound pressure level

In decibels. is 10 times the logarithm to the base 10 of the ratio of the square of a given sound pressure, obtained with a

standardized frequency-weighting and a standardized exponential time-weighting during a stated time period, to the square of the

reference pressure. (Symbol: or L,5 (see Note)).

NOTE: X is one of the standardized frequency weightings A. C or unweighted and F and S are standardized exponential time weightings as defined in AS 1259.1 and AS IEC 61672.1.

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