Measurement of noise emitted by machines; Airborne noise measurement, enveloping surface method; Test report (test record) form for enveloping surface method— 6 стр.
Acoustics - Determination of sound power levels of noise sources using sound pressure - Engineering method in an essential free field over a reflecting plane (ISO 3744:1994); German version EN ISO 3744:1995— 28 стр.
Acoustics - Determination of sound power levels of noise sources using sound pressure - Survey method using an enveloping measurement surface over a reflecting plane (ISO 3746:1995); German version EN ISO 3746:1995— 26 стр.