With the growth in automobile industry, the remarkable advance in vehicle horn technology to meet the customer requirement. Driven by customer demand, recent Electric horns are fully capable of small in size with a higher performance. However, size effect on performance of such parts with mechanical and acoustical characteristics has been considered to be a bottleneck in size optimization of diaphragm in vehicle horn to meet the minimum first resonance frequency. In this work, the first resonance frequency is optimized in order to investigate acoustic performance in lower frequency region as the design parameters of diaphragm are varied to meet the customer requirements of Horn Industries. Design of experiment is developed based on L27 orthogonal array to create the diaphragm models with four control points by using Creo software package. The performance evaluation for each setting of parameters is simulated using finite element method (FEM) and identified the first resonance frequency. The MINITAB software is used to identify the optimum level of first resonance frequency based on Taguchi and the results are conformed by developing an optimized model and analyzed in ANSYS.

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