Condenser Microphone Capsule Suspension for Vibration Isolation
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Solution Overview
Problem
Conventional suspension systems for condenser microphones are bulky, add weight and size, absorb sound waves, and introduce unwanted resonant frequencies within the audible range, leading to noise and distortion in the audio signal.
Innovation Solution
A suspension structure for condenser microphones comprising a pair of mounting arms with clamping structures at their ends, designed to be symmetrical and angled, made of materials with specific hardness and damping properties to prevent resonant frequencies above 100 Hz, and provide effective damping and isolation from mechanical vibrations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If conventional suspension systems are used to isolate the capsule from mechanical vibrations, then vibration isolation is improved, but the system becomes bulky, adding weight and size to the microphone
Solution Approach 1:
The suspension system is divided into multiple discrete mounting arms (typically four) that are distributed around the capsule perimeter. Each arm independently provides vibration isolation while the distributed arrangement achieves overall isolation effectiveness with less total material than a single bulky suspension system.
Solution Approach 2:
The mounting arms are constructed as thin, flexible structures that can deform to absorb vibrations. These thin-film or thin-walled arms provide the necessary compliance for vibration isolation while maintaining minimal mass and cross-sectional area, avoiding the bulkiness of conventional rigid suspension systems.
2Object-affected harmful factors
If conventional suspension systems are used to isolate the capsule from mechanical vibrations, then vibration isolation is improved, but the size and volume of the microphone increases
Solution Approach 1:
The suspension function is segmented into multiple thin mounting arms arranged around the capsule, allowing the isolation mechanism to be distributed in a compact configuration rather than requiring a single large suspension structure. This segmentation enables effective vibration isolation within a compact overall volume.
Solution Approach 2:
The mounting arms extend radially outward from the capsule in a planar arrangement, utilizing the radial dimension efficiently. This dimensional arrangement allows the suspension system to provide isolation without adding significant axial or radial bulk to the microphone housing.
3Object-affected harmful factors
If conventional suspension systems are used, then vibration isolation is provided, but sound waves are absorbed and unwanted resonant frequencies within the audible range are introduced
Solution Approach 1:
The mounting arms are designed with specific local properties: they are thin and flexible to provide vibration isolation, but their geometry and material selection are optimized to avoid resonant frequencies within the audible range. The arms may feature varying cross-sections or damping treatments at specific locations to control their vibrational characteristics and prevent unwanted resonance.
Solution Approach 2:
The physical parameters of the mounting arms (dimensions, material properties, mounting geometry) are carefully selected and optimized to shift any resonant frequencies outside the audible range. By changing parameters such as arm thickness, length, and material stiffness, the system achieves vibration isolation while maintaining a flat frequency response without audible resonances.
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 suspension structure effectively isolates the microphone capsule from vibrations, reducing noise and improving sound quality by preventing resonant frequencies within the audible range, thus enhancing acoustic signal integrity.
Implementation Method 1
made of materials with specific hardness and damping properties to prevent resonant frequencies above 100 Hz, and provide effective damping and isolation from mechanical vibrations
Data Source
AI summary
Embodiments of the disclosure include a microphone capsule suspension assembly for use in a microphone assembly that includes a capsule mount configured to support a condenser microphone capsule, and a pair of mounting arms. The pair of mounting arms comprise a first mounting arm and a second mounting arm. The first mounting arm includes a first end, a second end and a central portion disposed between the first end and the second end. The second mounting arm includes a third end, a fourth end and a central portion disposed between the third end and the fourth end. The capsule mount is coupled to, and disposed between, the central portions of the first mounting arm and the second mounting arm. The first end, second end, third end, and fourth end each comprise clamping structure, wherein the clamping structures are each configured to be supported by a portion of a housing that is configured to support the microphone capsule suspension assembly.