Cochlear Implant Signal Feedback for Sound Perception Accuracy
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Patients with cochlear implants face difficulties in correctly perceiving acoustic stimuli due to various factors related to electrical stimuli.
Innovation Solution
A cochlear implant system with a stimulator, input sources, and signal processors that receive and process ambient sound signals, generating stimulation signals based on transfer functions, and an external device for signal storage and comparison to adjust system components for improved sound perception.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If electrical stimulation is used to provide hearing to cochlear implant patients, then hearing capability is restored, but sound perception accuracy deteriorates due to various factors of the electrical stimuli
Solution Approach 1:
The system uses a feedback loop where the external device records both the electrical stimulation signal and the corresponding acoustic environment, then compares them to evaluate perception accuracy. This feedback mechanism allows for optimization of stimulation parameters to improve sound perception accuracy while maintaining hearing capability.
Solution Approach 2:
The system changes electrical stimulation parameters (amplitude, pulse width, frequency) based on the acoustic environment and feedback from accuracy evaluations. By dynamically adjusting these parameters, the system optimizes the balance between maintaining hearing capability and improving sound perception accuracy.
2Measurement precision
If multiple signal processors and input sources are used to monitor and adjust stimulation signals, then sound perception accuracy is improved, but device complexity increases
Solution Approach 1:
The system divides functionality into two segments: an implantable cochlear implant system that provides hearing restoration, and an external device that performs monitoring and analysis. This segmentation allows the complex monitoring and adjustment functions to be performed externally without increasing the complexity of the implanted device.
Solution Approach 2:
The external device acts as an intermediary between the cochlear implant system and the acoustic environment. It receives stimulation signals, records corresponding acoustic inputs, and processes this data to provide feedback for optimization, thereby improving sound perception accuracy without adding complexity to the implanted system.
3Measurement precision
If the system stores and compares stimulation signals with ambient sound signals, then accuracy of sound perception is enhanced, but loss of time occurs during signal processing and storage
Solution Approach 1:
The system performs preliminary recording of both stimulation signals and corresponding acoustic environment signals simultaneously during normal operation. This preliminary action captures the data needed for accuracy evaluation without requiring additional processing time later, as the comparison can be performed offline using pre-captured data.
Data Source
AI summary
A cochlear implant and analysis system includes a stimulator, a first input source, a signal processor, a second input source, and an external device. The system can receive an acoustic stimulus, generate a first input signal from the first input source representative of the acoustic stimulus, and apply a transfer function to the input signal to generate and output a stimulation signal to the stimulator. The second input source can receive the acoustic stimulus and generate a second input signal representative thereof. The external device can receive and store the stimulation signal, the second input signal, and optionally the first input signal in a memory. The external device can also synchronize and compare the stimulation signal, the second input signal, and optionally the first input signal.