http://www.legislation.gov.uk/id/uksi/2005/1643/schedule/1

SCHEDULE 1

PART 2Weekly Personal Noise Exposure Levels

Regulation 2(1)

The weekly personal noise exposure, L_EP,w, which corresponds to

{\bar{L}}_{E X, 8 h}

defined in international standard ISO 1999: 1990 clause 3.6 (note 2) for a nominal week of five working days, is expressed in decibels and is ascertained using the formula:

L_{E P, w} = 10 {log}_{10} [\frac{1}{5} \sum_{i = 1}^{i = m} 10^{0.1 {(L_{E P, A})}_{i}}]

where—

m is the number of working days on which the person is exposed to noise during a week; and
(L_EP,d)_i is the L_EP,d for working day i.