Hearing Instrument Insertion Depth Verification via Acoustic Feedback
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Solution Overview
Problem
Users of over-the-counter hearing instruments face difficulties in correctly inserting in-ear assemblies into their ear canals, leading to under-insertion issues that affect the device's performance, comfort, and retention, potentially causing overestimation of hearing thresholds and increased power consumption.
Innovation Solution
A hearing instrument system that includes a speaker and microphone configured to generate and measure a sound with a range of frequencies, allowing a processing system to classify the depth of insertion and provide an indication to the user, ensuring proper placement of the in-ear assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If users insert in-ear assemblies manually without verification, then the device is simple and easy to operate, but insertion depth is inaccurate leading to under-insertion issues
Solution Approach 1:
The hearing instrument uses its own built-in speaker and microphone to perform self-verification of insertion depth. The processor automatically generates test tones, captures acoustic responses, and determines insertion depth without requiring external measurement devices or professional fitting services. This self-service approach enables accurate measurement while keeping the overall system integrated and manageable.
Solution Approach 2:
The system implements a feedback loop where the speaker generates test sounds, the microphone captures the acoustic response from the ear canal, and the processor analyzes this feedback to determine insertion depth. This feedback mechanism allows the system to automatically verify and communicate insertion status to the user, resolving the contradiction between simple operation and precise measurement.
2Reliability
If in-ear assembly is under-inserted, then insertion is easier and less uncomfortable, but hearing threshold measurement becomes inaccurate and power consumption increases
Solution Approach 1:
The acoustic response captured by the microphone serves as feedback that indicates whether the in-ear assembly is properly inserted. The processor analyzes this feedback to determine if insertion depth is sufficient for accurate hearing threshold measurement, allowing users to achieve reliable measurements without difficulty in insertion.
Solution Approach 2:
The system performs preliminary verification of insertion depth before proceeding with hearing threshold measurement. By first ensuring the in-ear assembly is properly inserted through the self-verification process, the system prevents inaccurate measurements and excessive power consumption from occurring in the first place.
3Reliability
If in-ear assembly is not properly retained, then insertion is simpler and more comfortable, but device performance is compromised and power consumption increases
Solution Approach 1:
The hearing instrument autonomously verifies its own retention status through the acoustic response analysis. The processor determines whether the in-ear assembly is adequately retained in the ear canal based on the acoustic characteristics captured during the verification process, eliminating the need for manual assessment or complex retention mechanisms.
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 ensures correct insertion of the in-ear assembly, improving user experience by enhancing comfort, retention, and reducing power consumption by providing accurate hearing threshold measurements and appropriate gain settings.
Implementation Method 1
generating, by a speaker of the hearing instrument, a sound that includes a range of frequencies
Implementation Method 2
measuring, by a microphone of the hearing instrument, an acoustic response to the sound
Data Source
AI summary
A speaker of a hearing instrument generates a sound that includes a range of frequencies. Furthermore, a microphone of the hearing instrument measures an acoustic response to the sound. A processing system classifies, based on the acoustic response to the sound, a depth of insertion of an in-ear assembly of the hearing instrument into an ear canal of a user. Additionally, the processing system generates an indication based on the depth of insertion of the in-ear assembly of the hearing instrument into the ear canal of the user.