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20/30403701 DC
M00000563
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08 December 2020 BS EN ISO 8253-3. Acoustics. Audiometric test methods. Part 3. Speech audiometry
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Acoustic measurement, Audiometry, Signal-to-noise ratio, Maintenance, Speech recognition, Sound intensity, Acoustic testing, Testing conditions, Acoustoelectric effects, Calibration, Hearing (auditory perception), Speech