Dual-Mesh Drumhead Assembly for Quiet Rebound Control
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Solution Overview
Problem
Monofilament polyester mesh drum heads in electronic drumsets suffer from excessive deflection and noise due to the mesh vibrating against each other, leading to a rattling sound, while electronic cymbal pads are loud and noisy, disrupting quiet practice or performance environments.
Innovation Solution
A drum assembly with a threaded rod assembly that tensions the upper and lower drum heads independently, using a frame member and hoop channel to secure the drum heads, allowing for adjustable tension and reduced deflection, and incorporating a cap member for a conical shape to emulate a cymbal bell, with optional graphics on the mesh layers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a single-ply mesh drum head is used, then the drum head has good deflection and rebound characteristics, but it produces rattling noise when struck
Solution Approach 1:
The drum head is divided into two separate plies (first and second drum head plies) that are positioned facing each other with a gap therebetween. This segmentation allows each ply to function independently, providing the deflection and rebound characteristics of mesh material while the dual-ply configuration eliminates the rattling noise produced by a single mesh ply.
Solution Approach 2:
The invention uses a composite structure consisting of two separate mesh plies spaced apart from each other, creating a composite drum head system. This composite configuration combines the benefits of mesh material (deflection, rebound, quiet operation) while eliminating the drawbacks (rattling noise) through the spatial separation and interaction of the two plies.
2Stability of the object's composition
If a two-ply mesh drum head is used, then the drum head reduces deflection, but it produces rattling noise due to hard surface vibration
Solution Approach 1:
The invention uses flexible mesh material for both drum head plies, allowing them to deflect and vibrate in a controlled manner. The mesh structure provides flexibility and compliance, preventing the hard surface vibration that causes rattling noise while still achieving deflection control through the dual-ply configuration.
Solution Approach 2:
The spacing between the two mesh plies creates a cushioning effect that absorbs vibration and prevents direct contact between the plies during striking. This beforehand cushioning eliminates the rattling noise that would occur if the plies were in direct contact, while still providing deflection control through the coordinated movement of both plies.
3Reliability
If electronic cymbal pads with metal surfaces are used, then they provide realistic cymbal response, but they are loud and noisy
Solution Approach 1:
The invention replaces traditional rigid metal cymbal surfaces with flexible mesh material for the drum head plies. This flexible mesh material provides a quieter operating characteristic while still delivering realistic drum response, eliminating the loud and noisy characteristics of metal surface cymbals.
Solution Approach 2:
The invention converts the potential harm of noise into a benefit by using mesh material that inherently produces less noise during operation. The mesh structure absorbs impact energy more quietly than metal surfaces, transforming the noise problem into a quiet practice solution while maintaining realistic drum response characteristics.
4Productivity
If a ported drum head is subjected to high tension, then air can escape rapidly, but the hole loses structural support and tension distribution
Solution Approach 1:
The dual-ply mesh configuration provides composite structural support around the port hole, distributing tension evenly across both plies. This composite structure maintains hole integrity and structural support even under high tension conditions, while still allowing rapid air release through the port.
Solution Approach 2:
The invention applies local reinforcement around the port area through the dual-ply mesh configuration, where the overlapping or adjacent plies provide concentrated structural support at the critical hole location. This local quality enhancement maintains tension distribution and structural integrity specifically where needed, without compromising the overall air release capability.
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 solution provides a quiet and tunable drum assembly with minimal deflection and noise, allowing for adjustable tension and a realistic cymbal sound, suitable for quiet practice or performance without additional isolation booths.
Implementation Method 1
a threaded rod assembly extending between the upper drum head member and the lower drum head member. The threaded rod assembly includes an upper threaded member that is threadingly engaged with the upper drum head member. Rotation of the upper threaded member in a predetermined direction moves the upper drum head member away from the lower drum head member, such that tension is increased in the upper drum head member.
Implementation Method 2
an edge member that is positioned around an outer circumference of the upper drum head member and the lower drum head member. The edge member may be made from rubber or another compliant material. The edge member may reduce noise from the drum assembly and/or provide a quiet playing surface.
Implementation Method 3
The edge member may be made from rubber or another compliant material.
Data Source
AI summary
A drum assembly that includes a circular frame member that defines a frame opening therein, an upper drum head member secured to the frame member and spanning the frame opening, a lower drum head member positioned below the upper drum head member, secured to the frame member and spanning the frame opening, and a threaded rod assembly extending between the upper drum head member and the lower drum head member. The threaded rod assembly includes an upper threaded member that is threadingly engaged with the upper drum head member. Rotation of the upper threaded member in a predetermined direction moves the upper drum head member away from the lower drum head member, such that tension is increased in the upper drum head member.