DIN EN ISO 9295:2015-09

National foreword
National Annex NA (informative) - Bibliography
Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Conformity requirements
5 Requirements for measurements in a reverberation
   test room
6 Method using measured reverberation time
7 Method using calculated air absorption
8 Method using a reference sound source
9 Method using a free field over a reflecting plane
10 Calculation of sound power level under reference
   meteorological conditions
11 Measurement uncertainty
12 Information to be recorded
Annex A (normative) - Calculation of air absorption
        coefficient
Bibliography

Defines four methods for the determination of the sound power levels of high-frequency noise emitted by machinery and equipment in the frequency range covered by the octave band centred at 16 kHz, which includes frequencies between 11,2 kHz and 22,4 kHz.