§ Mr. Richard Wainwright
asked the Secretary of State for Education and Science whether the Medical Research Council has undertaken any research on the effects to the hearing of a repeated noise level above 90 dba; and, if so, what conclusions were reached.
§ Mr. Macfarlane
The Medical Research Council has given support for an investigation of some practical aspects of occupational hearing loss; a survey of the noise levels and hearing threshold in the drop-forging industry; and, in collaboration with the National Physical Laboratory, for audiometric surveys in industrial situations and hearing-conservation programmes.
Results from these joint surveys were included in the 1970 HMSO publication "Hearing and Noise in Industry". They also led to the publication of HMSO in 1972 of "Code of Practice for Reducing the Exposure of Employed Persons to Noise" which was prepared by the industrial health advisory committee's sub-committee on noise. They were subsequently used as source material for the pamphlet "Method of Test for Estimating the Risk of Hearing Handicap due to400W
relate to Great Britain and cover all members including classes of members who may not pay contributions but are members under the respective union's rules. Figures for teachers employed in maintained schools in England and Wales are not available from that source. The certified figures below are the latest available and, except where otherwise stated, relate to 31 December 1978.
Noise Exposure" (British Standard Number 530, published in 1976).