Modeling of Magnetic Pickups for Electric Musical Instruments

2019 22nd International Conference on the Computation of Electromagnetic Fields (COMPUMAG) Pub Date : 2019-07-01 DOI:10.1109/COMPUMAG45669.2019.9032828

I. Nishiguchi, H. Kaimori, A. Kameari, Eiichi Takebuchi, Yuta Nojima

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Abstract

In this paper, the modeling of the magnetic pickup of electric musical instruments, such as an electric guitar, an electric bass and an electromechanical keyboard instrument, is investigated. Focus is placed on the Rhodes electric piano, which gained popularity in 1960s and is still highly valued among jazz, soul and popular musicians. In most existing studies, the induced electromotive force (EMF) in the pickup of musical instrument is calculated using simplified methods in which the vibrator is modeled as a point without volume. In this study, detailed finite element analyses are performed to calculate the EMF in the pickup system as well as the estimation of the effect of the eddy current in the system. A solution procedure to obtain the EMF for a class of problems in which movement of the vibrator of the musical instrument is described by finite degrees of freedom is proposed. Sound generated based on the pickup model is evaluated as well. Simplified calculation methods of the existing studies are also reviewed and a modification is proposed to improve the accuracy.

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电子乐器磁性拾音器的建模

本文研究了电吉他、电贝斯和机电键盘等电子乐器的磁拾音器的建模问题。重点放在罗兹电子钢琴上，它在20世纪60年代流行起来，在爵士乐、灵魂乐和流行音乐家中仍然受到高度重视。在现有的大多数研究中，采用简化方法计算乐器拾取器中的感应电动势(EMF)，其中将振动器建模为无体积的点。在本研究中，进行了详细的有限元分析，以计算拾取系统中的EMF以及估计系统中涡流的影响。针对一类用有限自由度描述乐器振子运动的问题，提出了一种求解电动势的方法。根据拾取模型产生的声音也进行了评估。对现有研究的简化计算方法进行了综述，并提出了改进方法以提高计算精度。

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2019 22nd International Conference on the Computation of Electromagnetic Fields (COMPUMAG)

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