Abstract

The view is questioned that 5.00 p.m. on Friday to 8.00 a.m. on Monday constitutes an adequate interval for the recovery of occupationally induced temporary threshold shift.

Group mean pure tone thresholds were determined for a group of young weaving shed operatives on a Monday morning and compared with those obtained, from the same group, after a 16-day absence from noise.

The 16-day thresholds were lower than the results on a Monday morning; the largest mean difference was at 4 kc/s and amounted to 7·3 dB.

It was concluded that the Monday morning threshold of these weavers had a component of temporary threshold shift, the exact magnitude of which is unknown.