Musical Tone Apparatus Vibration Isolation and Sound Distribution
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Solution Overview
Problem
Existing musical instruments with vibrating sound boards, such as pianos, generate sounds that differ significantly from real acoustic instruments due to direct electromagnetic driver vibration transfer, leading to unintended tone changes and reduced sound volume.
Innovation Solution
The implementation of a back sound generator, upper sound generators, and fore sound generators in different frequency ranges, along with a flexible intervenient and non-uniform sound sticks, ensures that vibrations are not directly transferred to the instrument body, preventing resonance and maintaining tone authenticity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If an electromagnetic driver is joined to the sound board for generating tones, then tones can be generated from the sound board, but the sound board vibrates directly and transfers vibration to the instrument body, causing resonance and unintended tone changes
Solution Approach 1:
A flexible intervenient (damping material) is introduced between the sound board and the instrument body to act as an intermediary that absorbs vibration energy. This prevents direct vibration transfer to the instrument body, eliminating resonance while maintaining the sound board's tone generation capability. The damping material serves as a mediator that isolates the sound board from the instrument body structure.
2Ease of manufacture
If the electromagnetic driver is mounted at the center of the sound board, then the structure is simple and symmetric, but vibration resonates and tones change unintentionally
Solution Approach 1:
The electromagnetic driver is deliberately mounted at an off-center position on the sound board, creating an asymmetric configuration. This asymmetric placement prevents symmetric vibration patterns and resonance, thereby stabilizing the tone quality. The asymmetry disrupts the resonant modes that would otherwise occur with centered mounting.
3Device complexity
If sound generators are placed only in one position, then the device structure is simple, but sounds do not spread uniformly and realistic acoustic effect is not achieved
Solution Approach 1:
The sound generation system is segmented into multiple independent sound generators positioned at different locations (front, back, top, sides) of the instrument. Each sound generator operates independently to create a distributed sound field. This segmentation allows sounds to spread uniformly in all directions, achieving realistic acoustic effects that mimic natural instrument radiation patterns.
4Manufacturing precision
If sound sticks are attached with uniform spaces, then the manufacturing is precise and simple, but tones resonate and uniform vibration transfer occurs
Solution Approach 1:
The spaces between sound sticks are deliberately made non-uniform, with varying distances between adjacent sticks. This creates local variations in vibration transfer characteristics across the sound board surface. Different regions transfer vibration at different rates, preventing uniform resonance patterns and stabilizing overall tone quality while maintaining manufacturing precision through controlled non-uniformity.
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 configuration allows for the generation of realistic acoustic sounds that spread uniformly, maintaining tone quality and pitch, and preventing unintended tone changes, thus closely mimicking the sound of real acoustic instruments.
Implementation Method 1
a flexible intervenient sandwiched between the attachment component and the said edges of the sound board... vibration from the sound board is not directly transferred to the whole musical tone apparatus, resonance does not occur
Implementation Method 2
an electromagnetic driver (transducer) is joined to the sound board of a piano for instance, tones signals are sent to the electromagnetic driver, the sound board, not the electromagnetic driver, is vibrated
Data Source
AI summary
Sounds in different frequency range are generated from the rear, top and/or front face of the musical tone apparatus, sounds are generated and spread in all directions around the musical tone apparatus, and the tones sound very realistically acoustic. Vibration of the sound board does not resonate, tones generated from the sound board are not changed unintentionally, and tones of real acoustic musical instruments are realized. Vibration from the sound board is not directly transferred to the whole musical tone apparatus, by means of not allowing the sound board to touch the body of the musical tone apparatus and of pressing and fixing the soundboard to the attachment component with the thickness of the attachment component compressed.