Musical Drum With Tapered Ribbed Shell And External Mounting Blocks
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Solution Overview
Problem
Traditional percussion instruments, such as membranophones, limit the expansion of tone color and resonation due to their fixed structural characteristics, which restrict the vibratory and timbre qualities of the sound produced.
Innovation Solution
A musical percussion instrument with an oversized batter head, tapered and vertically ribbed metal shell, elongated walls, and a metal bottom with a vent hole, incorporating external hardware mounting blocks to enhance vibratory and resonant characteristics, allowing for tunability and improved sound production.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional membranophone construction is used, then the drum produces sound through membrane vibration, but the tone color expansion and resonation are limited
Solution Approach 1:
The patent merges the construction principles of membranophones and idiophones into a single instrument. The drum shell is designed to vibrate as an idiophone while the membrane functions as a membranophone, combining both vibration modes to expand tone color. The shell itself produces significant resonance without requiring additional resonators, integrating multiple functional aspects into one unified structure.
Solution Approach 2:
The patent introduces dynamic elements through the tapered shell design and vertical ribs that can move and vibrate independently. The shell's taper allows different sections to resonate at different frequencies, and the ribs provide movable surfaces that enhance vibration complexity, allowing the instrument to adapt its resonant characteristics dynamically during play.
2Adaptability or versatility
If the shell is made cylindrical with smooth interior and exterior, then manufacturing is simple, but shell vibration and resonation are restricted
Solution Approach 1:
The patent applies local quality changes by adding vertical ribs at specific locations along the shell interior and exterior. These ribs are strategically positioned to enhance vibration in particular areas without requiring complete redesign of the entire shell structure. The ribs create localized vibration zones that amplify overall shell resonance while maintaining manufacturing feasibility through additive features rather than complete structural complexity.
Solution Approach 2:
The patent introduces asymmetry through the tapered shell design where the diameter gradually decreases from the batter head down to the bottom. This asymmetric geometry creates different vibration characteristics along the shell length compared to a cylindrical design, enhancing resonation by allowing varying modes of vibration. The asymmetric taper is a straightforward manufacturing feature that adds vibratory complexity without significantly increasing manufacturing difficulty.
3Adaptability or versatility
If external hardware is mounted directly to the shell, then assembly is simple, but tonal vibrations are muted
Solution Approach 1:
The patent introduces mounting blocks as intermediary elements between the external hardware and the shell. These blocks serve as mediators that isolate the hardware from direct contact with the vibrating shell, preventing the hardware from muting tonal vibrations. The mounting blocks are positioned to allow the shell to vibrate freely while providing a stable mounting surface for hardware components, effectively decoupling the hardware's dampening effect from the shell's vibration.
4Adaptability or versatility
If the batter head is made oversized overlapping the drum shell opening, then the drum produces deeper sound, but the drum becomes harder to carry
Solution Approach 1:
The patent addresses the carrying issue by introducing handles that extend in a different dimensional space from the batter head. The handles are positioned on the shell body, allowing the drum to be carried by gripping the handles rather than lifting the oversized batter head. This dimensional separation keeps the batter head oversized for deep sound production while providing an alternative carrying interface that maintains convenience.
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 instrument significantly enhances the timbre and resonation of traditional drums, expanding the tonal dimension and suitability for orchestral and ensemble use, with improved carrying convenience through integrated handles.
Implementation Method 1
They produce sounds through the vibration of a tensioned membrane stretched over a smooth cylindrical shell or bowl. After being struck, the drumhead and the drum shell then vibrate together to produce the desired musical sound.
Implementation Method 2
If the shell has both ends closed, the air chamber inside the shell also vibrates sympathetically with the drumhead.
Implementation Method 3
The snare head and therefore the snares (resonators) vibrate sympathetically with the struck membrane, i.e., 'batter head,' to significantly expand the tonal dimension of sound produced.
Data Source
AI summary
A musical drum having a tapered shell connecting to a bottom, the tapered shell having ribs. The shell has an opening opposite the bottom. The drum also contains a plurality of layered mounting blocks mounted on the outer surface of the shell. The drum also has a rim member surrounding the shell and adjustably mounted to the mounting blocks. A membrane is mounted on the rib member and covers the opening at the top of the shell. A plurality of legs are adjustably mounted to the shell. Handles can also be mounted to the shell.