Measurement of noise emitted by machines; airborne noise emission; enveloping surface method and special reverberation room method; household and similar electrical appliances; particular requirements for washing machines and spin extractors (IEC 60704-2-4:1989); german version HD 423.2.4 S1:1989— 9 стр.
Acoustics; determination of sound power radiated into a duct by fans; in-duct method (ISO 5136:1990 and Technical Corrigendum 1:1993); German version EN 25136:1993— 24 стр.
Acoustics; determination of sound power radiated into a duct by fans; in-duct method (ISO 5136:1990 and Technical Corrigendum 1:1993); German version EN 25136:1993— 24 стр.
Measurement of noise emitted by machines; airborne noise emission; enveloping surface method and in-duct method; fan-assisted warm air generators, fan-assisted air heaters and fan units of air handling devices— 6 стр.