SIS SS-ISO 7566-1989 音响效果．纯音传导听力计校准用标准零级听力

标准号：SIS SS-ISO 7566-1989
中文标准名称：音响效果．纯音传导听力计校准用标准零级听力
英文标准名称：Acoustics — Standard reference zero for the calibration of pure-tone bone conduction audiometers
发布日期：1989/3/8 12:00:00
实施日期：1999/12/31 12:00:00
适用范围：This International Standard specifies the following data ap-plicable to the calibration of bone vibrators for pure-tone bone conduction audiometry :a) Reference equivalent threshold force levels (RETFLs), corresponding to the hearing threshold of young otologi-cally normal persons (see 3.9) by bone conduction audiometry. RETFL is the vibratory force level transmitted to a mechanical coupler of specified characteristics (see 5.3) by a vibrator when applied to the mechanical coupler under stated conditions of test and when energized at the voltage level corresponding to the normal hearing threshold for location on the mastoid prominence.NOTE — Interim values for the differences in reference equivalent threshold force levels between location on the forehead and mastoid are included for information in annex C.b) Essential characteristics of the bone vibrator and of its method of coupling to a person under test and to the mechanical coupler.c) Essential characteristics and datum level of the masking noise applied to the ear not under test.Guidance on the practical application of this International Standard in the calibration of audiometers is given in annex B.NOTE — Recommended procedures for carrying out bone conduction audiometry are specified in ISO 8253.