Binaural Hearing Aid Role Switching for Battery Balance
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Solution Overview
Problem
Binaural hearing assistance systems face challenges in maximizing battery lifetime due to power consumption imbalances between devices acting as masters and slaves, leading to quicker discharge of batteries with higher power consumption.
Innovation Solution
Implementing a role-switching mechanism where the device with the longer remaining battery lifetime becomes the new master, optimizing total system use time by preventing faster discharge, and achieving this through monitoring battery lifetimes and switching roles dynamically or quasi-statically during startup, link setup, or data stream reception.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If one device acts as master and forwards external data stream to slave, then data transmission is efficient, but master device battery discharges faster due to higher power consumption
Solution Approach 1:
The patent implements dynamic role switching between master and slave devices based on real-time battery status monitoring. When the master device's battery level drops below a threshold or the slave's battery level exceeds a threshold, roles are automatically exchanged. This dynamic adjustment ensures that the device with higher remaining battery capacity always acts as master, optimizing overall system operational duration while maintaining efficient data transmission.
Solution Approach 2:
The system monitors battery parameters (charge level, consumption rate) and uses these parameter changes to trigger role switching. By continuously tracking battery status and adjusting the master-slave configuration based on these parameter variations, the system maximizes total operational time while maintaining efficient data forwarding capability.
2Reliability
If master device forwards data stream continuously, then slave device receives data reliably, but overall system battery lifetime is limited by the master device
Solution Approach 1:
The patent employs dynamic role switching to balance the operational burden between devices. By monitoring battery status and automatically exchanging master-slave roles when thresholds are reached, the system ensures that the device with higher remaining capacity always performs the more energy-intensive master function. This maintains reliable data transmission while extending overall system operational time through equitable battery utilization.
Solution Approach 2:
The system implements feedback mechanisms where battery status information is continuously monitored and used to control role assignment. The feedback loop compares current battery levels against thresholds and triggers role switching decisions, ensuring that data transmission reliability is maintained while optimizing total system operational duration through adaptive master-slave configuration.
Data Source
AI summary
A hearing assistance system having a first and second hearing assistance devices for hearing stimulation of first and second ears, each hearing assistance device having a first interface for wireless data exchange between the first hearing assistance device and the second hearing assistance device and a second interface for wireless reception of an external data stream from an external data stream source, each hearing assistance device being adapted to repeatedly exchange information concerning the charging status of the battery of the respective hearing assistance device with the other hearing assistance device in order to monitor the remaining battery lifetimes, wherein the hearing assistance devices are caused to switch the role of master and slave when the difference in the battery charges of the two devices exceeds a given threshold, with the hearing assistance device having the higher battery charge forming the new master after the role switching.