TY - BOOK AU - Noise Advisory Council (Great Britain). Research Sub-Committee PB - H.M.S.O. for the Department of the Environment TI - Aircraft noise: should the Noise and Number Index be revised? Report by the Research Sub-Committee of the [Noise Advisory] Council KW - Airport noise. KW - Noise -- Measurement. CY - London SN - 0117505196 PY - 1972 M1 - Accessed from https://nla.gov.au/nla.cat-vn1849865 ER -