Analysis of Sound Transmission Characteristics of Multi-complex Panel for Noise Reduction in High Value-added Vessel Cabin

*Department of Naval Architecture and Ocean Engineering, Seoul National University, Seoul, Korea**Department of Mechanical Engineering, University of Suwon, Su won, Korea***Defense Acquisition Program Administration, Naval Ship Progr am, Department Combatant Ships Project Team, Seoul, Korea****Department of Naval Architecture and Ocean Engineering, Cho nnam National University, Yeosu, KoreaKEY WORDS: High value-added vessel 고부가가치선, Cabin 선실, Mini reverberant chamber 간이잔향실, Transmission loss 투과 손실, Multi-complex panel 복합패널ABSTRACT: Recently, as the importance of the interior noise in a ship cab in has risen, ship builders have becomeconcerned about the use of noise reduction panels to reduce cabin noise. The results of previous researches have been based on analytical and experimental meth ods using simple sandwich panels. However, panel structures are becoming more co mplex to improve the transmission loss. Thus, researches that a nalyze the transmission loss of a panel are reaching the limit of study. T his paper reports on research that was performed to determine t he sound transmission characteristics of multi-complex panels applicable to high valu e-added vessels. It presents comparisons between analytical met hods and experimental results by using a mini-reverberant chamber with components of sound attenuation panels, including the core and surface materi als. The sound transmission loss of multi-complex panels are also analyzed in terms of the influences of the inside perforate plates and air gap thickness on the attenuation. Finally, the multi-complex panel with the highest noise attenuation is proposed based on the analysis results and experimental results in mini-reverberant chamber, which wereverified using a real-si ze reverberant chamber.교신저자 송지훈: 전라남도 여수시 미평로 386, 061-659-7156, jhs@chonnam.ac.kr