DIN 4109-2/A1:2020-05

Отменен

Sound insulation in buildings - Part 2: Verification of compliance with the requirements by calculation; Amendment A1

На этот документ ссылаются

DIN 4109 Beiblatt 2:1989-11

Отменен

Sound insulation in buildings; guidelines for planning and execution; proposals for increased sound insulation; recommendations for sound insulation in personal living and working areas — 16 стр.