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Hydrogen Technologies Standards form the basic framework for market ramp-up
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Climate change Standards and specifications support climate targets
More information
Smart Farming Standards and specifications are drivers for the digitalization of agriculture
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Standards [CURRENT]

BS EN ISO 389-9
Acoustics. Reference zero for the calibration of audiometric equipment. Preferred test conditions for the determination of reference hearing threshold levels

Title (German)

Akustik. Standard-Bezugspegel für die Kalibrierung audiometrischer Geräte. Vorzugs-Messbedingungen zur Bestimmung von Bezugs- Hörschwellenpegeln

Edition 2010-02-28

Original language English

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Hydrogen Technologies Standards form the basic framework for market ramp-up

Climate change Standards and specifications support climate targets

Smart Farming Standards and specifications are drivers for the digitalization of agriculture

BS EN ISO 389-9 Acoustics. Reference zero for the calibration of audiometric equipment. Preferred test conditions for the determination of reference hearing threshold levels

Want to learn more?

BS EN ISO 389-9
Acoustics. Reference zero for the calibration of audiometric equipment. Preferred test conditions for the determination of reference hearing threshold levels