Percussion Instrument Weights for Drum Sound Quality
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Solution Overview
Problem
Conventional methods for improving drum sound quality, such as using weights inside bass drums, often result in increased weight and difficulty in handling, and do not effectively enhance low-tone clarity, while modifications to existing drums are not applicable.
Innovation Solution
A percussion instrument with a cylindrical barrel where multiple weights are fixed at intervals in the circumferential direction, integrating the shell and weights into a single piece to enhance mass distribution and vibration control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If many weights are placed in the shell to improve drum sound quality, then the drum sound quality improves, but the bass drum becomes too heavy and difficult to handle
Solution Approach 1:
The invention divides the single weight into multiple weights (at least two) that are distributed around the circumferential direction of the shell. This segmentation allows the weights to be positioned at optimal locations to control shell vibration modes, improving sound quality while keeping each individual weight relatively small, thus avoiding excessive total weight.
Solution Approach 2:
The weights are strategically positioned at specific locations around the circumferential direction of the shell based on vibration mode considerations. This local quality approach ensures that weights are placed where they most effectively control shell vibration, maximizing sound quality improvement with minimal total weight.
2Ease of operation
If a single weight is used to improve drum sound quality, then the bass drum remains easy to handle, but the effect of improving drum sound quality is insufficient
Solution Approach 1:
The invention segments the single weight into multiple weights distributed around the shell, which maintains ease of handling while significantly improving sound quality control through strategic positioning at multiple vibration nodes.
Solution Approach 2:
The invention transitions from a single weight (zero-dimensional point mass) to multiple weights distributed in the circumferential direction (adding spatial dimensionality). This dimensional change enables control of multiple vibration modes simultaneously, dramatically improving sound quality without proportionally increasing weight.
3Reliability
If conventional weights are placed inside the shell, then some sound improvement is achieved, but the shell and weights are not integrated and vibration control is insufficient
Solution Approach 1:
The invention merges the weights with the shell by fixing them to the outer surface, creating an integrated shell-weight system. This integration ensures that the weights move together with the shell during vibration, providing stable and predictable vibration control for improved sound quality.
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 produces high-quality drum sound with clear low tones and reduced sustain of high-order harmonics, improving sound quality without increasing the overall weight significantly.
Implementation Method 1
When the shell in a stationary state starts vibrating, the shell has a tendency to remain in the stationary state due to inertia. The tendency to remain in a stationary state increases as the mass of the shell increases.
Implementation Method 2
When an operation to play (hit) the drum is performed, the shell vibrates in response to the drumhead vibrating.
Data Source
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AI summary
Provided is a percussion instrument with which the sound quality of an existing percussion instrument can be improved. A plurality of weights 5A to 5D are provided on the inner circumferential surface of a shell 2 of a drum 1 (a percussion instrument). The weights 5A to 5D are provided at positions where the weights 5A to 5D have four-fold rotational symmetry in the circumferential direction of the shell 2. The weights 5A to 5D are each provided between lugs 3 that are provided adjacent to each other on the outer circumferential surface of the shell 2. The weights 5A to 5D are fixed to the inner circumferential surface of the shell 2 at these positions. The mass of each of the weights 5A to 5D is determined such that the total mass of the weights 5A to 5D is within the range of 25% to 200% of the mass of a shell to which no weights are fixed.