Network-Based Hearing Aid Compatibility Mode Selection
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Solution Overview
Problem
Hearing aids and cochlear implants experience interference from mobile communication devices, leading to diminished audible quality due to RF and magnetic field interference, which is exacerbated by digital devices and not adequately addressed by existing solutions focused solely on handset design.
Innovation Solution
A communication system that includes a host node capable of storing hearing aid user indications, allowing for a hearing aid compatibility mode of operation by adjusting settings such as codec rate, burst frame length, error correction coding, power level, frequency band, and antenna configuration, and providing additional network resources for HAC mode users.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If digital wireless telephones transmit over a wireless network via radio waves, then communication capability is improved, but hearing aid circuitry detects and demodulates the radio waves introducing interference signals
Solution Approach 1:
The system segments the communication service into standard mode and hearing aid compatible (HAC) mode. The network identifies when a hearing aid is present and automatically switches to HAC mode, dividing the communication channel into interference-free segments for hearing aid users while maintaining normal digital transmission for other users.
Solution Approach 2:
The system changes transmission parameters when HAC mode is activated, including adjusting codec rate, power level, frequency band, and error correction coding. These parameter modifications reduce RF interference while maintaining communication quality for hearing aid users.
2Ease of operation
If hearing aids operate in microphone mode to pick up sound waves, then sound amplification is achieved, but electromagnetic interference from mobile devices is detected and processed as electrical signals
Solution Approach 1:
The network acts as an intermediary between the mobile communication device and the hearing aid. It mediates the interaction by detecting hearing aid presence and controlling the mobile device's transmission parameters to minimize electromagnetic interference, allowing the hearing aid to function without interference.
3Measurement precision
If hearing aids are placed within strong RF field of communication device for better audio output, then audio quality is improved, but interference-induced signal degradation occurs
Solution Approach 1:
The system takes preliminary anti-action by detecting hearing aid presence before communication begins and proactively adjusting transmission parameters to prevent RF interference. This preemptive measure allows the hearing aid to operate in the optimal RF field position without experiencing interference signal degradation.
4Device complexity
If network provides standard service to all users, then network simplicity is maintained, but hearing aid users experience interference and diminished audible quality
Solution Approach 1:
The network service dynamically adapts based on user needs. The system continuously monitors for hearing aid presence and automatically switches between standard service mode and HAC mode, providing dynamic service adjustment without requiring complex manual configuration or user awareness of the technical changes.
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 system effectively reduces interference between mobile communication devices and hearing aids, enhancing the usability of hearing aids by minimizing interference and ensuring better audio quality for hearing aid users by tailoring communication parameters based on the presence of a hearing aid.
Implementation Method 1
When a hearing aid operates in an environment that includes a modulated RF field or a fluctuating magnetic field, undesired interference may be induced in the hearing aid circuitry as the varying fields are detected and processed as electrical signals by the hearing aid.
Implementation Method 2
Digital wireless telephones transmit over a wireless network via radio waves. The radio waves generated by the digital telephone are typically detected and demodulated by the hearing aid circuitry, thereby introducing an interference signal to the hearing assistive device. Digital wireless devices that employ time division multiplexed modulation schemes often generate interference due to the on/off keying of their modulation envelopes.
Implementation Method 3
Digital wireless telephones transmit over a wireless network via radio waves. The radio waves generated by the digital telephone are typically detected and demodulated by the hearing aid circuitry, thereby introducing an interference signal to the hearing assistive device.
Implementation Method 4
The digital telephone's electronics, such as the backlighting, the display, the keypad, the battery leads and the circuit board often also generate pulsed magnetic fields. The resultant magnetic field energy typically impacts for example, a hearing aid's wiring and interconnections, to generate interference at the hearing aid.
Data Source
AI summary
A system and method for providing a hearing aid compatibility mode of communication service to hearing aid users is disclosed. The described system can store an indication at a communication network that a given account is used by a person who wears hearing aid equipment. Services provided to that account can then use communication parameters and network resources which tend to minimize interference with a hearing aid. The network can instruct the user equipment and the radio access network to communicate using hearing aid friendly parameters. In some cases, network resources beyond those allocated for accounts not indicated as hearing aid user accounts can be allocated. Parameters adjusted in hearing aid compatibility mode can include codec rates, operating power levels, and burst frame length, among others. In some described embodiments, the hearing aid compatibility mode can be selectively enabled as desired by an account user.