Frame acoustic properties of sound absorption structure having helical spahes

Title
Frame acoustic properties of sound absorption structure having helical spahes
Authors
박준홍
Keywords
Sound absorption coefficient; Dynamic stiffness; Loss factor; Slit model
Issue Date
2015-05
Publisher
대한기계학회
Citation
Proceedings of the 4th Korea-Japan Joint Symposium on Dynamics and Control, 2015.5, 127-128
Abstract
New sound absorbing method utilizing layered-shaped medium is proposed. Conventional sound absorbing materials converts sound energy into thermal energy due to the porosity and tortuosity. New sound absorbing model has helical-like shape in layered format with composite materials, and it can change the flow resistance itself through the change of the air cavity between layers. Acoustic impedance and sound absorption coefficient using impedance tube are measured for comparing to conventional sound absorbing materials. According to the result of sound absorption coefficient, helical-like shaped structure's absorption coefficient exhibited better sound absorbing properties. A simple method of improving the sound absorption and transmission especially at low frequencies after incorporating periodic formation is proposed and verified through experimentation. And with cantilever beam, dynamic stiffness and loss factor of layered absorber is measured and compared with other conventional sound absorber's properties.
URI
http://www.dbpia.co.kr/Article/NODE06344118http://hdl.handle.net/20.500.11754/24554
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > MECHANICAL ENGINEERING(기계공학부) > Articles
Files in This Item:
There are no files associated with this item.
Export
RIS (EndNote)
XLS (Excel)
XML


qrcode

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

BROWSE