Headphone HPTF Authentication With Dynamic Audio Compensation
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Solution Overview
Problem
Existing biometric authentication methods for headphones are costly in terms of power consumption and sensor costs, and individual HPTF variations lead to inconsistent audio output due to air leakage and personal differences, affecting user experience.
Innovation Solution
A method and system for biometric authentication and dynamic compensation using headphone transfer function (HPTF) that includes constructing HPTF models, detecting frequency response deviations, and dynamically compensating for individual differences through real-time calibration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If facial recognition with infrared sensors and stereoscopic imaging is used, then authentication security is improved, but device cost and power consumption increase
Solution Approach 1:
The patent replaces optical/mechanical authentication systems (cameras, infrared sensors, depth sensors) with an acoustic-based authentication system using HPTF analysis. The headphone transfer function serves as a biometric identifier, eliminating the need for complex image sensors while maintaining authentication security through acoustic fingerprinting of the user's ear canal characteristics.
2Measurement precision
If multi-mic and noise reduction routines are used for speech recognition, then recognition accuracy is improved, but power consumption and sensor costs increase
Solution Approach 1:
The patent replaces complex multi-microphone noise reduction systems with a single-microphone HPTF-based authentication system. By using the headphone transfer function as the authentication mechanism, the system eliminates the need for multiple microphones and complex noise reduction algorithms, significantly reducing power consumption while maintaining authentication accuracy.
3Ease of manufacture
If HPTF is measured using ear simulators on dummy heads, then manufacturing process is simplified, but individual user audio experience deteriorates due to air leakage and personal differences
Solution Approach 1:
The patent performs HPTF measurement and compensation in advance during the manufacturing process using ear simulators, storing the individual user's HPTF characteristics in a database. When the user wears the headphones, the system retrieves the pre-measured HPTF data and applies real-time compensation based on detected frequency response deviations, combining manufacturing efficiency with personalized audio experience.
Solution Approach 2:
The patent implements a feedback mechanism where the system continuously monitors the actual HPTF during use by analyzing the frequency response between the headphone driver and the user's eardrum. When deviations from the target frequency response are detected (caused by improper wearing or air leakage), the system dynamically adjusts the audio output to compensate, ensuring consistent audio quality across different users and wearing conditions.
Data Source
AI summary
A method includes performing an authentication for a user based on a headphone transfer function (HPTF) of the user when the user wears the headphone. The method includes detecting whether a frequency response deviation exists between the HPTF of the user and a tuned HPTF. The method includes dynamically compensating for the HPTF of the user based on the detected frequency response deviation.