Hearing Device Core Nesting Ear Canal Fit
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Solution Overview
Problem
Conventional extended wear hearing devices configured to fit entirely within the bony region of the ear canal face challenges in dimensional and acoustic compatibility, leading to issues with fitting a significant portion of the adult population and maintaining acceptable sound quality.
Innovation Solution
A hearing device design with a core that includes a microphone, receiver, and battery, optimized in dimensions and arrangement to fit within the bony region, featuring a compliant seal apparatus and encapsulant to secure the device and minimize length and girth, while ensuring the microphone and receiver are positioned for direct sound transmission to the tympanic membrane.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the hearing device is configured to fit entirely within the bony region of the ear canal, then the device avoids cartilaginous region motion and contamination, but the device dimensions become incompatible with the limited space available in the bony region
Solution Approach 1:
The patent applies nesting by placing the microphone inside the receiver housing, with the microphone diaphragm positioned within the receiver's acoustic chamber. This nested configuration allows both components to occupy the same spatial envelope, significantly reducing the overall device volume while maintaining functional separation and acoustic integrity within the constrained bony region space.
Solution Approach 2:
The patent repositions components from a linear lateral-medial arrangement to a three-dimensional configuration where the microphone is located superior to the receiver rather than lateral to it. This dimensional reorganization optimizes the use of available space within the bony region, allowing the device to fit within the ear canal's cross-sectional dimensions while maintaining proper acoustic pathways.
2Manufacturing precision
If the receiver is positioned deeply in the ear canal proximal to the tympanic membrane, then sound quality is improved, but the device length exceeds the available space in the bony region
Solution Approach 1:
The patent positions the receiver superior to the microphone rather than lateral to it, utilizing the vertical dimension within the bony region. This three-dimensional arrangement allows the receiver to be placed in optimal acoustic position proximal to the tympanic membrane while keeping the lateral-medial footprint small enough to fit within the ear canal's cross-sectional dimensions.
Solution Approach 2:
The microphone is nested within the receiver housing, with the microphone diaphragm positioned inside the receiver's acoustic chamber. This nesting eliminates the need for separate lateral space for both components, reducing the overall device length while maintaining deep positioning of the receiver for optimal sound quality.
3Volume of moving object
If miniaturized receivers and microphones are used, then the device can fit within the bony region, but output efficiency and noise performance deteriorate
Solution Approach 1:
The patent nests the microphone within the receiver housing, allowing the microphone to utilize the acoustic chamber created by the receiver's position near the tympanic membrane. This nested configuration enables miniaturized components to achieve adequate output efficiency by leveraging the acoustic amplification effect of the ear canal geometry and receiver positioning, rather than relying solely on component size.
Data Source
AI summary
Hearing device configured to fit within the bony portion of the ear canal by selecting particular geometric dimensions for a hearing device core.