[f. L. audī-re to hear + Gr. μέτρον measure: see -(O)METER.] An application of the telephone for measuring minute differences in hearing.
1879. Daily News, 31 Dec., 5/4. This sonometer has been used by Dr. Richardson to measure minute differences in hearing under the name of the Audiometer.
1884. Health Exhib. Catal., 145/2. Audiometer for testing the amount of hearing possessed by the deaf.
