ISO/DIS 389-7被替代
Acoustics - Reference Zero For The Calibration Of Audiometric Equipment - Part 7: Reference Threshold Of Hearing Under Free-field And Diffuse-field Listening Conditions
出版：International Organization for Standardization
专家解读视频
Specifies a reference threshold of hearing for the calibration of audiometric equipment used under the following conditions: - The sound field in the absence of the listener consists of either a free progressive plane wave (free field) or a diffuse sound field, as specified in ISO 8253-2.- The sound signals are pure (sinusoidal) tones in the case of free-field conditions and one-third octave bands of (white or pink) noise in the case of diffuse-field conditions.- The sound pressure level is measured in the absence of the listener at the position where the centre of the listener's head would be.- Listening is binaural.
