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    Düşük Frekanslı Hava Giriş Sistemlerinde Kullanılan Bir Helmholtz Rezonatöürünün Gürültü Azaltma Performansının Artırılması İçin Tasarım Optimizasyonu
    (Necmettin Erbakan Üniversitesi Fen Bilimleri Enstitüsü, 2021) Özdemir, Mustafa Cihat; Önen, Ümit
    Nowadays, especially in the automotive industry, the noise caused by internal combustion engines causes serious negativities in terms of environment and driver comfort. Many different types of acoustic elements have been developed to reduce these disturbing noises. As a result of noise reduction applications where acoustic elements are used, it has been observed that unwanted noise is significantly reduced and acoustic improvements are achieved. These acoustic elements are widely used not only in the automotive industry, but also in the aerospace, machinery, ventilation and building industries. One of the acoustic elements that have a wide range of use in this context is the Helmholtz resonator. The Helmholtz resonator is highly effective in damping certain frequency noises if properly designed. However, Helmholtz resonators have to be designed in accordance with the operating frequency at which noise will be reduced. For this reason, determining the optimum resonator parameters for a certain operating frequency has attracted the attention of researchers and engineers in recent years. In this thesis, firstly, theoretical information about Helmholtz resonators and optimization methods is given. The structural parameters of a pre-designed Helmholtz resonator operating in the low frequency band were then optimized to provide the highest acoustic performance. The noise reduction performance of the Helmholtz resonator, which has been redesigned according to the optimization results, has been given by simulation studies. The success of the optimization study has been demonstrated by comparing the obtained results with a different study in the literature.