Determining Sound Absorbing and Transmission Loss Properties of Rubbers Used in Automotive Industries

Yıl 2018, Sayı: 4, 137 - 148, 04.12.2018

Osman Ipek Murat Koru Orhan Serce Huseyin Karabulut Mehtap Hıdıroglu

Öz

Sound
is simply a kind energy which sprawls to environment as waves. Sound changes
pressure at air, water etc. which this detected by ears as sound. At the other
hand noise is a kind of sound which is unpleasant, and undesirable for humans.
In automotive industry, noise effects drivers and passengers comfort directly.
Because of that, automotive manufacturers consider noise insulation in
automobiles as an important factor for quality. Ethylene Propylene Diene
Monomer Rubber (EPDM), Natural Rubber (NR) and Nitrile Rubber (NBR) are one of
the most used insulation materials in automotive industry. In this study, EPDM,
NR and NBR materials sound absorption coefficient and sound transmission loss
are measured with impedance tube for investigate these materials as insulation
part placed between passenger cabin and engine side on shifter mechanisms.
Measurements repeated three times and results showed at graphics. Results are
which obtained from tests are presented systematically in this study. In conclusion,
study
results showed that EPDM is slightly better than NR and NBR as material of
noise insulation part at shifter mechanisms.

Anahtar Kelimeler

Sound absorption coefficient, Sound transmission loss, Sound insulation properties of rubbers

Kaynakça

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