Hearing Device Magnetic Induction Coil Placement and Filtering
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Solution Overview
Problem
Hearing devices with wireless communication capabilities face design constraints due to their small size and proximity to the user's head, leading to noise interference and inadequate shielding, which affects the performance of magnetic induction coils used for communication.
Innovation Solution
The hearing device design includes a magnetic induction coil in the coupling module and a magnetic induction control unit in the behind-the-ear housing module, with a detachable connection and a filter to reduce noise and electromagnetic interference, allowing for effective communication while maintaining a compact size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the magnetic induction coil is provided in the behind-the-ear housing module with the battery, then the device integration is improved, but the noise level at the coil increases due to insufficient shielding
Solution Approach 1:
The patent divides the hearing device into separate modules: the magnetic induction coil is placed in the coupling module while the battery and magnetic induction control unit are located in the behind-the-ear housing module. This segmentation physically separates noise-generating components from the sensitive coil, reducing electromagnetic interference while maintaining modular design benefits.
Solution Approach 2:
The patent introduces a filter as an intermediary component between the battery/control unit and the magnetic induction coil. This filter acts as a mediator that blocks harmful electromagnetic noise from reaching the coil while allowing necessary signals to pass through, thus protecting the coil without requiring complex shielding structures.
2Volume of moving object
If the hearing device is made smaller to fit in the ear, then the compactness is improved, but the antenna performance deteriorates due to limited space and proximity to the head
Solution Approach 1:
The patent positions the magnetic induction coil in the coupling module that extends outward from the behind-the-ear housing, effectively utilizing the spatial dimension along the ear canal axis. This dimensional arrangement allows the coil to be positioned away from the head while maintaining a compact behind-the-ear profile, improving antenna performance without significantly increasing overall device volume.
3Volume of moving object
If the magnetic induction coil is integrated with the battery for compactness, then the device compactness is improved, but the communication quality deteriorates due to electromagnetic interference
Solution Approach 1:
The patent segments the device into distinct functional modules: the coupling module containing the magnetic induction coil is separated from the behind-the-ear housing module containing the battery. This segmentation maintains compactness through modular design while preventing electromagnetic interference between the battery and coil.
Solution Approach 2:
A filter is introduced as an intermediary component that selectively blocks electromagnetic noise from the battery while allowing communication signals to pass through. This filter protects the magnetic induction coil from interference without requiring the coil to be physically distant from the battery, thus maintaining compactness while ensuring communication quality.
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 reduces noise levels at the magnetic induction coil, enhances communication quality, and allows for easier maintenance and replacement of components, improving the overall performance and reliability of the hearing device.
Implementation Method 1
Magnetic induction, or near-field magnetic induction (NFMI), typically provides communication, including transmission of voice, audio and data
Implementation Method 2
with a detachable connection and a filter to reduce noise and electromagnetic interference
Data Source
AI summary
The disclosure relates to a hearing device comprising a magnetic induction coil, a magnetic induction control unit interconnected with the magnetic induction coil. The magnetic induction control unit and the magnetic induction coil being configured for wireless communication. The hearing device comprises a behind-the-ear housing module, the behind-the-ear housing module comprising a signal processor for processing received audio signals into a signal modified to compensate for a user's hearing impairment, a connecting module configured for providing the modified signal to an ear of the user, a coupling module interconnecting the behind-the-ear housing module and the connecting module. The magnetic induction control unit is provided in the behind-the-ear housing module, and the magnetic induction coil is provided in the coupling module.