Modal Analysis of A Stringed Instrument, Oud, By Using Finite Element Method: Using Experimental Data In The Development of Vibro-Acoustic Model

In the production process of a stringed instrument, the use of modal analysis techniques is important for the selection of the materials and determining the design properties, in order to obtain the desired sound character. However, only experimental modal analysis techniques are not sufficient for string instruments. Because these instruments are made of natural materials such as wood which have varying physical properties, they have a large number of design variations, and, they are highly influenced by external factors such as humidity and heat. Therefore, in this study, a vibro-acoustic finite element model of the oud instrument was developed and theoretical modal analysis was performed. Experimental modal analysis data were used in the development and validation of the model, and, an oud was produced step by step during the modeling. In this process, ANSYS software was used together with the ‘Acoustic ACT’ plug-in to ensure that the air in the body is also included in the model. In addition, ‘Orthotropic Mesh’ was used in the modeling of wood material which has different physical properties in different directions. The findings obtained from theoretical and experimental modal analysis were presented comparatively.