Historical
BS 5330:1976
Method of test for estimating the risk of hearing handicap due to noise exposure (British Standard)
Specifies a relationship between noise exposure and the expected incidence of hearing handicap. The exposure is derived from the equivalent continuous A-weighted sound level during an 8-hour working day, whilst the handicap is taken as 30 dB referred to a specified audiometric zero.
British Standards Institution [bsi]