ISO 140-9:1985
Specifies a method for measuring a quantity called the suspended ceiling normalized level difference when the sound transmitted by paths other than the required paths is negligible.
OEN:
ISO
Langue:
English
Code(s) de l'ICS:
91.060.30;
91.120.20
Statut:
Annulée
Date de Publication:
1985-02-13
Numéro Standard:
ISO 140-9:1985