Hearing Aid Antenna Polarization Element for Wireless Efficiency
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Hearing aids face challenges in achieving stable and efficient wireless communication due to size constraints, proximity to the human head, and interference from body tissues, which affect antenna performance and efficiency, especially in binaural systems operating in the 2.4 GHz ISM band.
Innovation Solution
The use of a polarization element, such as a conducting material on the hearing aid shell, to orient the electric field of the antenna orthogonally to the user's head, improving radiation efficiency and bandwidth, and potentially using a combination of electric and magnetic antennas for different communication needs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the antenna is placed close to the human head to maintain compact hearing aid design, then the device size is reduced, but the radiation efficiency deteriorates due to high losses in body tissues at 2.4 GHz
Solution Approach 1:
A polarization element is introduced as an intermediary component between the antenna and the human head. This element transforms the polarization of the electromagnetic field to reduce interaction with lossy body tissues, thereby maintaining radiation efficiency despite the antenna's proximity to the head.
Solution Approach 2:
The polarization state of the antenna is changed as a key parameter to optimize performance. By adjusting the polarization characteristics through the polarization element, the antenna achieves better radiation efficiency in the constrained space near the human head.
2Reliability
If the antenna is positioned to achieve optimal radiation efficiency, then wireless communication performance is improved, but the available space for other components is reduced
Solution Approach 1:
The polarization element utilizes the spatial dimension between the antenna and the head to achieve its function. By operating in this intermediate space, it improves communication quality without requiring additional volume that would crowd out other components.
3Use of energy by moving object
If the antenna operates in the 2.4 GHz ISM band for low-power communication, then power consumption is reduced, but signal attenuation increases due to proximity to body tissues
Solution Approach 1:
The polarization element serves as a mediator that protects the 2.4 GHz signal from attenuation by body tissues. It transforms the field polarization to minimize interaction with lossy tissues, enabling low-power operation without excessive signal loss.
4Weight of moving object
If the antenna is designed with narrow profile and lightweight construction for comfort, then wearability is improved, but manufacturing precision requirements increase
Solution Approach 1:
The polarization element is implemented as a thin film or flexible structure that can be integrated into the hearing aid shell. This approach maintains the narrow profile and lightweight design while achieving the required polarization transformation, though it does require precise manufacturing.
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 enhances wireless communication between hearing aids by reducing signal attenuation and interference, allowing for automatic volume adjustment and improved ear-to-ear communication without manual adjustment, while maintaining a compact and lightweight design.
Implementation Method 1
an antenna (14) that is closer to the first end (4) than to the second end (6) of the hearing aid; a wireless communication unit (16) that is coupled to the antenna (14) and configured for wireless communication
Implementation Method 2
an electromagnetic field emitted by the antenna propagates along the surface of body with its electrical field substantially orthogonal to the surface of the body of the user
Data Source
Figure 1
Figure 2
Figure 3
AI summary
Disclosed is an in-the-ear hearing aid, the hearing aid having a first end and a second end, the hearing aid comprising a microphone configured to receive sound, a processing unit configured to provide a processed audio signal for compensating a hearing loss of a user, an output transducer for providing an acoustic output, an antenna and a wireless communication unit for wireless communication, where the antenna is provided closer to the first end than to the second end of the hearing aid, and a polarization element configured for forming the polarization of the antenna, where the polarization element is provided between the first end and the second end of the hearing aid.