Truncated Conical Supporter for Handling Noise Reduction
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Solution Overview
Problem
Existing electroacoustic transducer devices, such as microphones and speakers, face challenges in reducing handling noise due to vibrations transmitted through the housing, where increasing the size of the supporter is limited, and conventional rubber ring supporters are ineffective in shifting resonance frequencies to lower noise bands without increasing radial dimensions.
Innovation Solution
A truncated conical shaped supporter with a first portion in contact with the electroacoustic transducer and a second portion in contact with the housing, positioned at different axial levels, allows for increased shear deformation area without radial expansion, enhancing noise reduction by shifting resonance frequencies to lower frequencies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the ring width of the rubber ring supporter is increased to enlarge the shear deformation area, then the handling noise reduction effect is improved, but the radial size of the supporter increases which is limited by the housing space
Solution Approach 1:
The patent transitions from a two-dimensional rubber ring (with shear deformation area determined by ring width and thickness) to a three-dimensional truncated conical structure. The shear deformation area is now determined by the slant height and circumferential dimensions of the conical surface, allowing increased effective area without radial expansion. The conical geometry provides additional axial and slant dimensions for vibration damping while maintaining a compact radial profile suitable for handheld microphone constraints.
2Object-affected harmful factors
If the thickness of the rubber ring is decreased to increase the shear deformation area, then the handling noise reduction effect is improved, but the structural strength and stability of the supporter deteriorates
Solution Approach 1:
The patent employs a truncated conical geometry with curved surfaces instead of a flat or cylindrical rubber ring. The conical shape distributes mechanical loads more effectively across the structure, providing inherent structural strength. The slanted surfaces and three-dimensional form factor enhance load-bearing capacity while maintaining the necessary shear deformation characteristics for vibration damping, eliminating the need to compromise thickness for strength.
3Object-affected harmful factors
If a conventional rubber ring structure is used, then the manufacturing simplicity is maintained, but the resonance frequency cannot be shifted to lower frequency band for effective noise reduction
Solution Approach 1:
The patent changes the geometric parameters of the supporter from a standard rubber ring configuration to a truncated conical shape with specific dimensional relationships. The slant height, base diameter, and top diameter of the cone are optimized to control the shear deformation characteristics and shift the resonance frequency to the desired lower frequency band. This geometric parameter optimization achieves the frequency shifting goal while maintaining manufacturability through conventional molding techniques.
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 effectively reduces handling noise without increasing the supporter's radial size, improving noise reduction efficacy by shifting resonance frequencies and maintaining stability in the microphone or speaker.
Implementation Method 1
an increase in an area of the supporter in which the supporter undergoes shear deformation
Implementation Method 2
a resonance frequency of a vibration generated in a head portion of the microphone is shifted toward a lower frequency side with an increase in the area that undergoes shear deformation
Implementation Method 3
a rubber ring in which a plurality of holes (or grooves) are formed in a circumferential direction of the rubber ring
Implementation Method 4
an insulator (hereinafter referred to as 'supporter' where appropriate) formed of an elastic material such as rubber
Data Source
AI summary
A supporter for use in an electroacoustic transducer device including a housing and an electroacoustic transducer mounted to the housing using the supporter, the supporter including: a truncated conical shaped body including: a first portion configured to be held in contact with the electroacoustic transducer at a first position; and a second portion configured to be held in contact with the housing at a second position, wherein the second position is disposed spaced from the first position along an axial direction of an axis of the truncated conical shaped body.