Adjustable Drum Shell Geometry for Wide-Range Acoustic Tuning
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Solution Overview
Problem
Traditional drum kits require multiple drums tuned to different frequencies for various music genres, increasing capital, storage, and maintenance costs, as the frequency of a drum is determined by its depth and diameter, necessitating multiple instruments for different musical styles.
Innovation Solution
A drum with an adjustable mechanism that allows continuous adjustment of its effective diameter and height, enabling tuning of audio characteristics such as resonant frequency and tone color, using inner cylindrical shells and multi-axial hinges to change the drum's dimensions without altering the number of sound boxes, thus allowing for versatile musical performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple drums are used to produce different frequencies, then the frequency range and musical versatility are improved, but the capital cost, storage space, and maintenance costs increase
Solution Approach 1:
The patent combines multiple drum functions into a single drum by integrating an adjustable mechanism that allows one drum to produce multiple frequencies. The mechanism includes a movable inner shell that can be positioned at different locations within the drum cavity, effectively merging what would traditionally require multiple separate drums into one instrument.
Solution Approach 2:
The patent introduces dynamic adjustability to the drum structure, allowing the inner shell to be moved to different positions to change the effective playing area and thus the frequency. This dynamic configuration enables a single drum to adapt its frequency characteristics, replacing the need for multiple fixed-frequency drums.
2Adaptability or versatility
If multiple drum kits are equipped for different music genres, then the musical versatility is improved, but the storage space and maintenance costs increase
Solution Approach 1:
The patent creates a universal drum that can serve multiple musical genres by incorporating an adjustable mechanism. The drum can be tuned to different frequencies suitable for rock, classical, folk, and other genres, making it a multi-functional instrument that replaces multiple specialized drum kits.
Solution Approach 2:
The dynamic adjustment mechanism allows the drum to be reconfigured for different musical styles. By moving the inner shell to different positions, the drum can adapt its acoustic properties to suit various genres, eliminating the need to store multiple genre-specific drum kits.
3Adaptability or versatility
If the drum structure is made adjustable for frequency tuning, then the versatility is improved, but the device complexity increases
Solution Approach 1:
The patent segments the drum into an outer shell and an inner adjustable shell, allowing independent movement of the inner shell. This segmentation enables frequency tuning without requiring complex overall restructuring of the drum, as only the inner component needs to be adjustable.
Solution Approach 2:
The inner shell acts as an intermediary element between the player and the drumhead. By adjusting the position of this intermediate component, the frequency can be tuned without directly modifying the drumhead or the outer shell, simplifying the adjustment mechanism.
Data Source
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AI summary
Aspects of embodiments concerns an apparatus for tuning a drum, the drum comprising a drum shell having an upper skin, the apparatus comprising: an outer static rim that is removably operably coupleable to the inside wall of a drum shell; a diameter adjustment mechanism that is removably operably coupleable with the drum shell, the diameter adjustment mechanism including one or more inner cylindrical shells mountable within the drum shell and being configured for axial displacement whereby an upper rim thereof can be selectively brought into or out of contact with an upper skin of the drum and thereby change an effective diameter of the upper skin.