UNE EN ISO 389-4-1999 标准详情
- 标准号:UNE EN ISO 389-4-1999
- 中文标题:
- 英文标题:Acoustics - Reference Zero For The Calibration Of Audiometric Equipment - Part 4: Reference Levels For Narrow-band Masking Noise
- 标准类别:西班牙国家标准UNE
- 发布日期:
Defines reference levels for narrow-band masking noise presented by air conduction from an earphone in pure-tone audiometry. Data given is in terms of levels to be added to the reference equivalent threshold sound pressure levels for the correspondin
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