DIN - German Institute for Standardization

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

ABNT NBR IEC 61094-3
Electroacoustics - Measurement microphones Part 3: Primary method for free-field calibration of laboratory standard microphones by the reciprocity technique

Edition 2025-03-12

Original language Portuguese

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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

ABNT NBR IEC 61094-3 Electroacoustics - Measurement microphones Part 3: Primary method for free-field calibration of laboratory standard microphones by the reciprocity technique

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ABNT NBR IEC 61094-3
Electroacoustics - Measurement microphones Part 3: Primary method for free-field calibration of laboratory standard microphones by the reciprocity technique