BS-2497-4 | Specification for a reference zero for the calibration of pure-tone audiometers. Normal threshold of hearing for pure tones by bone conduction | Document Center, Inc.

BS-2497-4 › Complete Document History
Specification for a reference zero for the calibration of pure-tone audiometers. Normal threshold of hearing for pure tones by bone conduction

Obsolete Revision Information:

1972 EDITION - WITHDRAWN - July 25, 1972