Telecoil Ground Plane Decoupling for Hearing Aid Noise Isolation
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Solution Overview
Problem
Existing devices with telecoils and antennas for wireless communication with hearing aids face challenges due to electromagnetic noise interference, which reduces the sensitivity of the telecoil.
Innovation Solution
A device with separate ground planes for the antenna and the telecoil, along with a decoupling element to attenuate frequencies, is designed to reduce noise interference and enhance the sensitivity of the telecoil.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a telecoil and antenna are integrated in the same device, then wireless communication functionality is provided, but electromagnetic noise from the antenna interferes with the telecoil and reduces sensitivity
Solution Approach 1:
The device is divided into separate ground planes: a first ground plane for the antenna and a second ground plane for the telecoil. This segmentation isolates the electromagnetic fields of each component, preventing noise from the antenna from interfering with the telecoil while maintaining both wireless communication functions.
Solution Approach 2:
A decoupling element is introduced between the first and second ground planes to attenuate electromagnetic noise frequencies. This intermediary component acts as a filter that blocks harmful frequencies from propagating from the antenna ground plane to the telecoil ground plane, while allowing necessary signals to pass.
2Object-affected harmful factors
If separate ground planes are used for antenna and telecoil, then noise interference is reduced, but device complexity increases
Solution Approach 1:
The decoupling element is designed to selectively attenuate specific frequency ranges that correspond to noise from the antenna while allowing lower frequencies used by the telecoil to pass through. By changing the frequency response parameters of the ground plane connection, noise is reduced without blocking essential signals.
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 solution effectively reduces electromagnetic noise interference, improving the sensitivity of the telecoil and ensuring reliable wireless communication with hearing aids.
Implementation Method 1
a decoupling element arranged between the first element and the second element, the decoupling element configured to attenuate frequencies at a third frequency
Implementation Method 2
a coil configured to receive a signal at a second operational frequency, the second operational frequency being lower than the first operational frequency
Data Source
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Figure 3~4
AI summary
A device is provided. The device includes an antenna for communicating with one or more hearing aids. The device further comprises a coil for receiving a wireless signal. The device comprises a first ground plane connected to the antenna. The device comprises a second ground plane connected to the coil. The first ground plane and the second ground plane are decoupled via a decoupling element so that noise from one ground plane does not propagate to the other ground plane at certain frequencies.