2006 Volume 12 Issue 23 Pages 191-195
Starting from T-3 rate by using hollow metal door, we performed acoustic test intending to improve the sound transmission loss in low frequency range (125Hz-250Hz). To avoid of resonance in a hollow metal door, we developed new method of door leaf design, named "Oscillo-synthesizing method". Special composition of reinforcement ribs causes considerable sound transmission loss in low frequency range.
Ethical standards of the publisher (‘Ethical Standards Concerning the Peer Review for the Presentation of Architectural Transactions and Works’)
