Characteristics of sound interaction with materials
High volume sound is known to be damaging to the human ear but even frequencies that are insensitive to human ear possess potential hearing issues. This thesis aim to investigate the best possible material for passive sound attenuation at various octave center frequencies. By performing an experi...
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sg-ntu-dr.10356-722862023-03-04T18:41:26Z Characteristics of sound interaction with materials Seow, Yong Jie Lye Sun Woh School of Mechanical and Aerospace Engineering DRNTU::Engineering::Mechanical engineering High volume sound is known to be damaging to the human ear but even frequencies that are insensitive to human ear possess potential hearing issues. This thesis aim to investigate the best possible material for passive sound attenuation at various octave center frequencies. By performing an experiment with three materials (steel sheet, 2 –ply cardboard and acoustic foam) varied against four different frequencies (250, 500, 2000, 4000 Hz), their sound attenuation performance was noted and eventually analyzed against a composite material (dual material composite) configuration of materials. The steel sheet and foam configuration proved to be most effective, followed by the cardboard and steel sheet configuration. Results shows that composite materials do not sum up their sound attenuation effectiveness but instead follows a rule that relates to mass and stiffness of a material. Interestingly, other factors such as material structure and air gap affects the effectiveness significantly. Different materials have been discovered to work well against low frequencies or high frequencies but a composite material is not the only answer to a well-rounded sound frequency attenuation barrier. Bachelor of Engineering (Mechanical Engineering) 2017-06-01T05:09:53Z 2017-06-01T05:09:53Z 2017 Final Year Project (FYP) http://hdl.handle.net/10356/72286 en Nanyang Technological University 58 p. application/pdf |
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DRNTU::Engineering::Mechanical engineering Seow, Yong Jie Characteristics of sound interaction with materials |
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High volume sound is known to be damaging to the human ear but even frequencies that
are insensitive to human ear possess potential hearing issues. This thesis aim to
investigate the best possible material for passive sound attenuation at various octave
center frequencies. By performing an experiment with three materials (steel sheet, 2 –ply
cardboard and acoustic foam) varied against four different frequencies (250, 500, 2000,
4000 Hz), their sound attenuation performance was noted and eventually analyzed
against a composite material (dual material composite) configuration of materials. The
steel sheet and foam configuration proved to be most effective, followed by the
cardboard and steel sheet configuration. Results shows that composite materials do not
sum up their sound attenuation effectiveness but instead follows a rule that relates to
mass and stiffness of a material. Interestingly, other factors such as material structure and
air gap affects the effectiveness significantly. Different materials have been discovered to
work well against low frequencies or high frequencies but a composite material is not the
only answer to a well-rounded sound frequency attenuation barrier. |
author2 |
Lye Sun Woh |
author_facet |
Lye Sun Woh Seow, Yong Jie |
format |
Final Year Project |
author |
Seow, Yong Jie |
author_sort |
Seow, Yong Jie |
title |
Characteristics of sound interaction with materials |
title_short |
Characteristics of sound interaction with materials |
title_full |
Characteristics of sound interaction with materials |
title_fullStr |
Characteristics of sound interaction with materials |
title_full_unstemmed |
Characteristics of sound interaction with materials |
title_sort |
characteristics of sound interaction with materials |
publishDate |
2017 |
url |
http://hdl.handle.net/10356/72286 |
_version_ |
1759857529885556736 |