Cochlear Implant Energy Saving Mode via Speech Detection
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Solution Overview
Problem
Cochlear implant systems face high current consumption, leading to reduced battery lifetime and the need for frequent surgical replacements, which is risky and inefficient, especially for fully implantable devices.
Innovation Solution
A signal processing method and arrangement that includes an information detection circuit to switch to an energy-saving operational mode only when speech information is present, using a hysteresis threshold and voice activation detection, with optional memory elements to minimize delay and conserve energy by bypassing unnecessary signal processing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of stationary object
If continuous signal processing is performed in cochlear implant systems, then hearing functionality is maintained, but current consumption increases and battery lifetime decreases
Solution Approach 1:
The patent implements periodic action by switching the signal processing circuit between active and energy-saving modes based on speech detection. The system periodically activates full processing only when speech is detected, while maintaining a reduced monitoring state during non-speech periods. This allows the cochlear implant to maintain hearing functionality during speech events while conserving battery energy during non-speech periods, directly addressing the contradiction between continuous operation and energy conservation.
2Duration of action of stationary object
If energy-saving mode is activated to reduce current consumption, then battery lifetime is extended, but risk of missing important sounds increases
Solution Approach 1:
The patent introduces an intermediary speech detection mechanism that continuously monitors the acoustic environment for speech characteristics. This intermediary detection system acts as a gatekeeper, determining when to activate the full signal processing circuit. By using this intermediary layer, the system maintains high reliability for detecting important sounds (through the always-active detection mechanism) while still achieving energy savings by suppressing full processing during non-speech periods.
Solution Approach 2:
The system implements self-service through automatic speech detection and mode switching. The cochlear implant autonomously determines when to activate energy-saving mode based on its own detection of speech presence, without requiring external control. This self-managed approach ensures that the system maintains reliability by automatically activating full processing when speech is detected, while independently managing energy consumption during non-speech periods.
3Use of energy by moving object
If speech-based energy saving mode is implemented, then energy consumption is reduced, but system complexity increases due to additional detection circuits
Solution Approach 1:
The patent applies universality by designing the speech detection circuit to perform multiple functions: it detects speech presence for energy-saving mode control, and simultaneously provides information for hearing assistance. This multi-functional approach allows the additional detection circuitry to justify its complexity by serving dual purposes - energy management and enhanced hearing functionality - thereby mitigating the negative impact of increased device complexity.
Data Source
AI summary
A signal processing arrangement for a cochlear implant system is described. A sensing microphone senses an acoustic signal to generate a corresponding electrical sound signal. An information detection circuit performs spectral analysis on the sound signal to identify the presence of speech information. A sound signal processing circuit generates an implant communications signal for the cochlear implant system based on the sound signal, and has an energy saving operational mode wherein the implant communications signal is generated only when the information detection circuit identifies that speech information is present in the sound signal.