Numerical and experimental studies on the structure-borne noise control on a residential kitchen hood

Öztürk S., Erol H.

International Journal of Acoustics and Vibrations, vol.18, no.1, pp.3-6, 2013 (SCI-Expanded) identifier


The growing demand for highly efficient household appliances has driven the need for tools to predict, evaluate, and optimize both existing and new designs. Improving the design of the residential kitchen hood requires in-depth knowledge of the structure. In particular, the dynamic behaviour of the structure during the working period needs to be studied carefully during the design stage. A tool for predicting the structure-borne noise behaviour would save a considerable amount of time, reduce the number of prototypes that need to be built, and decrease the development costs. This paper concentrates on reducing the noise generated from the vibrating structure of a residential kitchen hood by using both numerical and experimental methods. Normal modes of the structure were identified, and the results agree well with the finite-element model. To validate the finite element model, an operational deflectionshape analysis of the structure was performed by using the laser Doppler vibrometry method. This study presents the finite element model and the experimental results of a kitchen hood. This study shows that the contribution of structure-borne noise from the vibrating panels to the overall kitchen hood noise levels is significant, especially at low frequencies. Thus, panel vibration is a critical design consideration for end users because of its relationship to noise and comfort.