Norm-Entwurf
23/30433779 DC
23/30433779 DC
BS EN ISO 3744. Acoustics. Determination of sound power levels of noise sources using sound pressure. Engineering methods for an essentially free field over a reflecting plane
Titel (englisch)
BS EN ISO 3744. Acoustics. Determination of sound power levels of noise sources using sound pressure. Engineering methods for an essentially free field over a reflecting plane