Acoustics; determination of sound power levels of noise sources; precision methods for broad-band sources in reverberation rooms (ISO 3741:1988); german version EN 23741:1991— 16 стр.
Acoustics; determination of sound power levels of noise sources; precision methods for discrete-frequency and narrow-band sources in reverberation rooms (ISO 3742:1988); german version EN 23742:1991— 11 стр.
Acoustics; test code for the measurement of airborne noise emitted by rotating electrical machinery; part 2: survey method (ISO 1680-2:1986); german version EN 21680-2:1991— 14 стр.
Acoustics; test code for the measurement of airborne noise emitted by rotating electrical machinery; part 1: engineering method for free-field conditions over a reflecting plane (ISO 1680-1:1986); german version EN 21680-1:1991— 15 стр.
Measurement of airborne noise emitted by machines; enveloping surface method; machine sets in hydroelectric power stations and water pumping plants— 11 стр.