Bowed-String Shoulder Rest with Slots for Acoustic Decoupling
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Solution Overview
Problem
Existing shoulder rests for string instruments like violins and violas often compromise playing comfort and sound quality due to inadequate fit and clamping, leading to discomfort and impaired playing quality.
Innovation Solution
A shoulder rest with a segmented support element featuring longitudinal opening slots and strategically positioned through-holes that allow for independent oscillation, minimizing coupled masses and enhancing acoustic vibration behavior.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the support element is made as a solid base, then structural integrity is ensured, but acoustic vibration behavior is interfered with and tonal quality deteriorates
Solution Approach 1:
The support element is divided into multiple separate elements (first support element and second support element) instead of being a solid base. This segmentation allows each element to vibrate independently, reducing interference with the instrument's acoustic vibration while maintaining sufficient structural integrity through strategic placement and connection to the instrument body.
2Object-generated harmful factors
If the base body is segmented into separately oscillating elements, then acoustic vibration behavior is improved and tonal quality enhances, but structural integrity may be compromised
Solution Approach 1:
The base body is segmented into multiple separately oscillating elements that are acoustically decoupled, allowing independent vibration patterns. This segmentation reduces interference with the instrument's sound transmission while the elements remain structurally connected to the instrument body, maintaining necessary structural integrity.
Solution Approach 2:
Different regions of the support element have different properties: the segmented portions allow free acoustic vibration, while the connection points to the instrument body provide structural support. This local differentiation optimizes both acoustic performance and structural stability.
3Object-generated harmful factors
If opening slots are provided in the base body, then separately oscillating elements are formed and tonal quality improves, but manufacturing complexity increases
Solution Approach 1:
Opening slots are provided in the base body to divide it into multiple separately oscillating elements. These slots create acoustic decoupling between elements, reducing interference with sound transmission. The slots can be formed through standard manufacturing processes like CNC routing or laser cutting, adding minimal complexity to production.
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
The design achieves improved tonal quality and playing comfort by reducing interference in sound transmission while maintaining structural integrity and flexibility.
Implementation Method 1
the support element comprises a flat, extended base body which is segmented in such a way that it forms a plurality of separately oscillating elements
Implementation Method 2
acoustic vibration behavior of the instrument itself, allowing for a particularly high overall tonal quality when playing the instrument
Data Source
Figure 1
Figure 2
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AI summary
A shoulder rest (30, 40) for a stringed instrument, comprising a longitudinally extending support element (32) for resting on the player's shoulder and/or chest, is intended to enable a particularly high tonal quality from the ensemble of instrument and shoulder rest (30, 40). According to the invention, the support element (32) is provided with a number of longitudinally extending opening slots (38) that completely penetrate the thickness of the support element (32).