Asymmetric Vibration Isolator for Hearing Device Receiver Suspension
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Hearing devices face limitations in amplification due to unwanted feedback loops caused by vibrations transmitted from the receiver to the microphone, leading to reduced amplification capabilities.
Innovation Solution
A suspension system with a vibration isolator that moves freely between the receiver and sound outlet, featuring asymmetric damping parts with varying thickness along the longitudinal and transverse axes, incorporating flexible and rigid components to disperse vibrations away from the housing, ensuring optimal mechanical coupling and acoustic leakage prevention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the receiver is rigidly mounted to the housing, then mechanical stability is improved, but vibration transmission to the microphone increases causing feedback loops
Solution Approach 1:
The patent introduces a suspension system as an intermediary element between the receiver and the housing. This suspension includes a vibration isolator with asymmetric damping parts that mechanically couples the receiver to the housing while filtering out vibration frequencies that would cause feedback. The asymmetric damping structure selectively dampens vibrations in specific directions, allowing stable mounting while preventing harmful vibration transmission to the microphone.
2Power
If amplification is increased to improve hearing aid performance, then signal strength is improved, but feedback loops are exacerbated due to vibration transmission
Solution Approach 1:
The patent converts the harmful vibration energy generated by high-power amplification into beneficial controlled damping. The asymmetric damping parts of the vibration isolator are designed to specifically target and dissipate the vibration frequencies produced by the receiver during high-power operation. By directing vibration energy into controlled damping mechanisms rather than allowing it to transmit to the microphone, the system enables higher amplification levels without suffering from feedback loops.
3Ease of manufacture
If a symmetric damping structure is used, then manufacturing simplicity is improved, but vibration dispersion in multiple directions is limited
Solution Approach 1:
The patent employs asymmetric damping parts in the vibration isolator to achieve superior vibration dispersion. The asymmetric geometry is specifically designed to interact with the vibration patterns generated by the receiver, creating multiple vibration modes that dissipate energy in different directions. This asymmetric structure prevents vibration energy from concentrating in single directions and transmitting to the microphone, while still being manufacturable using standard 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
Effectively reduces vibration energy transmission to the housing, enhancing amplification capabilities by dispersing vibrations and absorbing energy, thereby minimizing feedback loops.
Implementation Method 1
a damping part enclosing said acoustic passage; wherein the damping part of said vibration isolator is asymmetrical along a longitudinal axis of said vibration isolator
Implementation Method 2
effectively reduces vibration energy transmission to the housing, enhancing amplification capabilities by dispersing vibrations and absorbing energy
Implementation Method 3
the flexible part is more flexible than the substantially rigid part
Data Source
Figure 1
Figure 2
Figure 3
AI summary
Title: A suspension for a hearing device receiver and a method of producing a hearing device and a hearing device. The present invention relates to a suspension for a hearing device receiver comprising a first part and a second part and a vibration isolator positioned between the first and the second parts and mechanically coupled to the first and second parts; wherein the first part is adapted to at least partly enclose the receiver; and the second part is adapted to at least partly enclose a sound outlet of the hearing device; and wherein the vibration isolator 150) comprises an acoustic passage and a damping part enclosing said acoustic passage; and wherein the acoustic passage part provides an acoustic passages between the first and second parts; and wherein the damping part of the vibration isolator is asymmetrical along a longitudinal and/or a transverse axis of the vibration isolator; and wherein the vibration isolator is freely suspended between the first and second parts. Thereby, the suspension is able to disperse vibration energy away from the housing.