Acoustic Transducer Bracket Positioning for Guitar Soundboard
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Solution Overview
Problem
Musical instruments equipped with acoustic transducers face inefficiencies in converting vibration into acoustic radiation due to variations in installation position and structure, leading to inconsistent sound emission.
Innovation Solution
The acoustic transducer device is strategically positioned between soundboard braces, supported by a bracket and tapered caps to align with vibration antinodes, ensuring optimal vibration transmission and minimizing node positions for enhanced radiation efficiency, while supporters are attached to nodes to maintain stability and prevent shifting during use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the acoustic transducer is installed at arbitrary positions on the acoustic portion, then the installation structure becomes simple, but the conversion efficiency of vibration into acoustic radiation becomes inconsistent and low
Solution Approach 1:
Soundboard braces are pre-installed on the acoustic portion at positions corresponding to vibration nodes. These braces create predetermined locations that guide the subsequent installation of the acoustic transducer at optimal positions (antinodes), ensuring high conversion efficiency without requiring complex alignment procedures during final installation.
Solution Approach 2:
The soundboard braces serve as intermediary elements that mediate between the acoustic portion and the acoustic transducer. By attaching to the braces rather than directly to the acoustic portion, the transducer is positioned at optimal locations while the braces absorb and manage the mechanical stresses, simplifying the overall installation structure.
2Stability of the object's composition
If the acoustic transducer is positioned at locations with high rigidity (node positions), then the structural stability increases, but the vibration amplitude decreases and conversion efficiency deteriorates
Solution Approach 1:
The acoustic portion is designed with non-uniform local properties through the strategic placement of soundboard braces. The braces create localized regions of high rigidity at node positions while leaving antinode regions with lower rigidity and higher vibration amplitude. The acoustic transducer is specifically positioned at these antinode locations to maximize conversion efficiency.
3Productivity
If the acoustic transducer is positioned at antinode positions for high conversion efficiency, then the vibration amplitude increases, but the position becomes more sensitive to warpage and shifting over time
Solution Approach 1:
The support structure is segmented into multiple soundboard braces distributed across the acoustic portion. Each brace independently supports the acoustic transducer at optimal positions. This segmentation allows the system to accommodate warpage and dimensional changes over time while maintaining the transducer's position at high-efficiency locations, as the braces can move independently to compensate for shifts.
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 significantly enhances the conversion efficiency of vibration into acoustic radiation, maintaining high performance even with warpage over time, ensuring consistent and realistic sound production.
Implementation Method 1
an acoustic transducer supported by the bracket and configured to vibrate the acoustic portion based on an acoustic signal inputted thereto
Implementation Method 2
a bracket supported by two of the plurality of soundboard braces; and an acoustic transducer supported by the bracket and configured to vibrate the acoustic portion
Data Source
AI summary
A musical instrument, including: an acoustic portion configured to generate sounds in accordance with a vibration; a plurality of soundboard braces attached to a flat surface of the acoustic portion; a bracket supported by two of the plurality of soundboard braces; and an acoustic transducer supported by the bracket and configured to vibrate the acoustic portion based on an acoustic signal inputted thereto, wherein the bracket is disposed so as to bridge the two of the plurality of soundboard braces, and the acoustic transducer vibrates the acoustic portion at a position between the two of the plurality of soundboard braces.