Investigation of Parameters that Affect Interior Sounds in Vehicles with Tests

Abstract

Vehicles with improved driving comfort are produced in order to be more competitive in the developing automotive sector. One of the parameters that affect driving comfort is the acoustic performance of the vehicle in the cabin. The most explicit sounds that affect the cabin area are road, wind, wheel, trim, and engine sounds. In this study, vibration accumulation on the body of the vehicle has been determined. Accordingly, the vehicle body has been improved with isolation, and sound assessment has been done inside the cabin. It has been determined that the acoustic performance is improved with the isolation improvements in the vehicle. Afterward, the effect of engine types, different body types for the same kind of engine, wheel rim effects, and engine mounts on the interior sound level is examined. In the examination of acoustic performance, it is determined that the articulation index is determinant rather than the sound level. The isolation effect on the vehicle body and the impact of the engine mounts are evaluated by the jury tests. 

Keywords

• Cabin Noises
• Engine Noises
• Siemens LMS Tab Acoustic

ARAÇLARDA KABİN İÇİ SESLERİ ETKİLEYEN PARAMETRELERİN TESTLERLE İNCELENMESİ

Abstract

Gelişen otomotiv sektöründe daha rekabetçi olabilmek için sürüş konforu iyileştirilmiş araçlar üretilmektedir. Sürüş konforunu etkileyen parametrelerden biri aracın kabin içi akustik performansıdır. Kabin bölgesine etki eden en belirgin sesler; yol, rüzgar, tekerlek, trim ve motor sesleridir. Bu çalışmada, araç gövdesinde oluşan titreşim yığılmaları tespit edilmiş ve buna göre araç gövdesi izolasyonla iyileştirilerek kabin içi ses değerlendirmesi yapılmış ve izolasyon iyileştirmeleri ile akustik performansın iyileştirildiği tespit edilmiştir. Sonrasında motor türlerinin, aynı tür motor için farklı gövde tiplerinin, tekerlek jant etkilerinin ve motor takozlarının kabin içi ses düzeyine etkisi incelenmiştir. Akustik performansın incelenmesinde ses seviyesinden ziyade duyum indisi kavramının belirleyici olduğu tespit edilmiştir. Araç gövdesindeki izolasyon ve motor takozlarının etkisi jüri testleri ile de değerlendirilmiştir.

Keywords

• Kabin Sesleri
• Motor Sesleri
• Siemens LMS Tab Acoustic

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