A MOBILE LABORATORY FOR GROUP HEARING TESTS

A mobile laboratory has been constructed as part of a Navy program to investigate both the auditory and the non-auditory effects (if any) of the noise exposure received by jet engine mechanics and members of the flight deck crew aboard aircraft carriers. The construction of the mobile laboratory was necessary to permit the measurement of auditory thresholds and performance on certain psychomotor tests under controlled environmental conditions. The mobile laboratory has proved to be a useful facility for making hearing measurements in the field. It is relatively easy to move about and the design has, on the whole, proved satisfactory. Some additional noise control will be necessary before the acoustical design is completely satisfactory. The group audiometer is capable of making comparisons between groups of men, and between before and after exposure tests taken on the same group of men. The audiometer is simple, fast, reliable, and not particularly costly. (Author)