Hearing Aid Inductive Link for Low-Power Telephone Audio
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Solution Overview
Problem
Existing solutions for wireless communication between hearing aids and telephones, such as those using Bluetooth or telecoils, are complex, power-consuming, and prone to interference, making them unsuitable for direct integration into hearing instruments.
Innovation Solution
A hearing aid system with a short-range digital, low-power link using transceivers with antennas, modulation, and demodulation circuitry, operating above the audio baseband frequency, and an inductive link between a telephone and a hearing instrument, providing robust data transmission and reduced power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If Bluetooth or telecoil interfaces are used for wireless communication between hearing aids and telephones, then communication capability is achieved, but device complexity and power consumption increase
Solution Approach 1:
The patent extracts the wireless communication function from complex Bluetooth protocols and telecoil magnetic coupling, isolating only the essential inductive coupling mechanism at audio frequencies. This creates a simplified interface that maintains communication capability while removing unnecessary complexity from the hearing aid system.
Solution Approach 2:
The patent creates a simplified copy of wireless communication functionality by using direct inductive coupling at audio frequencies, rather than implementing full Bluetooth protocol stacks. This copied function achieves the essential goal of wireless audio transmission with minimal complexity.
2Adaptability or versatility
If Bluetooth or telecoil interfaces are used for wireless communication, then communication capability is achieved, but power consumption increases
Solution Approach 1:
The patent extracts only the essential inductive coupling mechanism operating at audio frequencies, eliminating the high power consumption associated with Bluetooth radio frequency transmission and complex protocol processing. This reduced-functionality approach maintains communication capability while dramatically lowering power requirements.
Solution Approach 2:
The patent changes the operating parameters of the communication interface by using audio frequency inductive coupling instead of radio frequency Bluetooth transmission. This parameter change from RF to audio frequencies, combined with direct coupling rather than magnetic field coupling, reduces the energy required for transmission.
3Adaptability or versatility
If telecoil is used for receiving sound from phone receiver, then basic audio transmission is achieved, but sound quality deteriorates and interference increases
Solution Approach 1:
The patent introduces a direct inductive coupling intermediary between the telephone receiver and hearing aid, using the telephone's own output circuitry as the coupling medium. This intermediary approach provides a cleaner signal path that reduces interference and improves audio quality compared to telecoil magnetic coupling.
Solution Approach 2:
The patent substitutes the magnetic field-based telecoil coupling mechanism with an electrical inductive coupling mechanism that operates at audio frequencies. This substitution provides a more direct and controlled signal transmission path, improving reliability and reducing interference.
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 solution offers a simple, reliable, and low-power method for receiving telephone calls with improved sound quality and privacy, eliminating the need for intermediate devices and complex setup processes.
Implementation Method 1
A hearing aid system with a short-range digital, low-power link using transceivers with antennas, modulation, and demodulation circuitry, operating above the audio baseband frequency, and an inductive link between a telephone and a hearing instrument
Implementation Method 2
The hearing instrument comprises a telecoil for receiving an (magnetically induced) electrical input in the audio base band from a corresponding telecoil
Data Source
AI summary
The invention relates to wireless communication between listening devices, in particular to a hearing aid system comprising a hearing instrument and a telephone apparatus. The invention further relates to a method of receiving a telephone call and to the use of a hearing aid system. The object of the present invention is to provide a relatively simple, reliable scheme for receiving a telephone call in a hearing instrument. The problem is solved in that the telephone apparatus comprises a transmitter for establishing a short range digital, low-power link to a hearing instrument comprising a corresponding receiver. This has the advantage of providing a relatively simple and low power solution, where at least the incoming part of a telephone conversation is wirelessly transmitted via a low-power link. The invention may e.g. be used for the communication between a hearing instrument and a telephone, where a standard wireless interface for local connectivity, such as a Bluetooth interface, is not technically feasible or not available for other reasons.