Extracting Vibration Characteristics and Performing Sound Synthesis of Acoustic Guitar to Analyze Inharmonicity

• 作者: Johnson Clinton Kiran P. Wani
• 来源期刊: 声学期刊(英文)
• 学科: 物理学
• 关键词: Modal Analysis Resonance Frequency Fast Fourier Transform Octaves Acoustic Guitar
• 年，卷（期）: 2020,（3）
• 页码范围: 41-50
• 页数: 10页
• 分类号: O35

摘要

The produced sound quality of guitar primarily depends on vibrational characteristics of the resonance box. Also, the tonal quality is influenced by the correct combination of tempo along with pitch, harmony, and melody in order to find music pleasurable. In this study, the resonance frequencies of the modelled resonance box have been analysed. The free-free modal analysis was performed in <em>ABAQUS</em> to obtain the modes shapes of the un-constrained sound box. To find music pleasing to the ear, the right pitch must be set, which is achieved by tuning the guitar strings. In order to analyse the sound elements, the Fourier analysis method was chosen and implemented in <em>MATLAB</em>. Identification of fundamentals and overtones of the individual string sounds were carried out prior and after tuning the string. The untuned strings showed irregular fundamental frequencies and higher partials of decay. Octaves and power spectrums have been presented and discussed in this paper.