Elastic Exciter Support for Musical Instruments
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Solution Overview
Problem
The attachment of an exciter to an acoustic portion of a musical instrument, such as a guitar, alters the frequency characteristics of the sound emitted, leading to inconsistent acoustic performance.
Innovation Solution
A musical instrument design that includes an acoustic portion, an exciter with a vibrating portion and an exciter body, and a support portion that elastically displaces the exciter body relative to the acoustic portion, ensuring the resonance frequency of the vibration system is lower than the lowest resonance frequency of the acoustic portion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If an exciter is attached to the acoustic portion, then the acoustic portion can be excited to emit sound, but the frequency characteristics of the sound emitted from the acoustic portion change
Solution Approach 1:
A support portion is introduced as an intermediary component between the exciter body and the acoustic portion. This support portion includes an elastic portion that allows relative movement, acting as a mediator that isolates the exciter's mass from directly affecting the acoustic portion's vibration characteristics, thereby maintaining consistent frequency characteristics while still enabling sound emission.
Solution Approach 2:
The support portion is designed with specific elastic properties and damping characteristics that change the dynamic parameters of the overall system. By carefully selecting the elastic portion's stiffness and damping coefficients, the system achieves optimal isolation效果, preventing frequency characteristic changes while maintaining effective sound emission capability.
2Device complexity
If the exciter body is rigidly fixed to the acoustic portion, then the structure is simple, but the resonance frequency of the vibration system affects the acoustic portion's vibration characteristics
Solution Approach 1:
The support portion serves as a simple yet effective intermediary that decouples the exciter body from the acoustic portion. This intermediate structure adds minimal complexity while effectively preventing the exciter's mass from influencing the acoustic portion's vibration characteristics, thus maintaining consistency without significant structural complication.
Solution Approach 2:
The elastic portion of the support portion is designed to provide beforehand cushioning against the negative effects of the exciter body's mass. By pre-configuring the elastic and damping properties, the system anticipates and compensates for potential vibrations and frequency characteristic changes before they occur.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This design effectively suppresses changes in frequency characteristics of the sound emitted from the acoustic portion even when the exciter is attached, maintaining consistent acoustic performance.
Implementation Method 1
the support portion supports the exciter body such that the exciter body is elastically displaced with respect to the acoustic portion
Implementation Method 2
the support portion supports the exciter body such that the exciter body is elastically displaced with respect to the acoustic portion
Implementation Method 3
a resonance frequency of a vibration system including the exciter body and the support portion is lower than the lowest resonance frequency of the acoustic portion
Data Source
AI summary
A musical instrument includes: an acoustic portion that makes sound in response to vibration; an exciter that includes an exciter body and a vibrating portion vibrating with respect to the exciter body, and excites the acoustic portion; and a support portion that is attached to the acoustic portion and supports the exciter body such that the vibration is transmitted from the vibrating portion to the acoustic portion. The support portion supports the exciter body such that the exciter body is elastically displaced with respect to the acoustic portion. A resonance frequency of a vibration system including the exciter body and the support portion is lower than the lowest resonance frequency of the acoustic portion.