# The Control of Noise at Work Regulations (Northern Ireland) 2006, Paragraph 1

Extent: N.I.

The daily personal noise exposure level LEP,d , which corresponds to LEX, 8 h defined in international standard ISO 1999: 1990 clause 3.6, is expressed in decibels and is ascertained using the formula:
LEP,d=LAeq,Te+10log10(TeT0) where—
Te is the duration of the person’s working day, in seconds;
T 0 is 28,800 seconds (8 hours); and
LAeq,Te is the equivalent continuous A-weighted sound pressure level, as defined in ISO 1999: 1990 clause 3.5, in decibels, that represents the sound the person is exposed to during the working day.

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Source: https://www.legislation.gov.uk/nisr/2006/1/schedule/1/paragraph/1 (the official version)
Page: https://openlegislation.uk/control-of-noise-at-work-regulations-northern-ireland-2006/schedule-1/paragraph-1
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.