Adaptive Ear Interface Detection for Headphone ANC
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing noise cancellation technologies in electronic devices do not effectively adapt to different headphone configurations, such as ear tip sizes and seal qualities, leading to compromised audio quality and user experience across various environments.
Innovation Solution
An adaptive noise cancellation (ANC) system that detects and adjusts to the ear interface mode of headphones by measuring acoustic responses and using a look-up table or ear canal modeling to optimize audio output, allowing for improved performance across a range of configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single set of ANC parameters is used for all headphone configurations, then the system is simple to implement, but audio quality and noise cancellation performance are compromised across different ear interface modes
Solution Approach 1:
The patent implements dynamic adaptation of ANC parameters based on detected ear interface mode. The system transitions from static single-parameter configuration to dynamic multi-parameter selection, where parameters are automatically adjusted according to the detected seal quality and earbud configuration, resolving the contradiction between system simplicity and performance reliability
Solution Approach 2:
The system changes operational parameters based on detected conditions. Different ANC parameter sets are selected corresponding to different ear interface modes (e.g., with/without overmold, different ear tip sizes), allowing optimal noise cancellation performance for each configuration while maintaining automated operation
2Reliability
If ANC parameters are optimized for specific headphone configurations, then audio quality improves for those configurations, but the system cannot adapt to other configurations
Solution Approach 1:
The patent creates a universal ANC system that handles multiple headphone configurations through a single integrated solution. The system includes multiple parameter sets and uses detection mechanisms to automatically select the appropriate parameters for the connected headphones, making the system universally compatible while maintaining optimized performance across different ear interface modes
Solution Approach 2:
The system employs feedback through detection of ear interface mode characteristics (acoustic responses, impedance measurements) to automatically determine the appropriate ANC parameter set. This closed-loop approach ensures the system adapts to the specific headphone configuration connected, maintaining high audio quality and noise cancellation performance across diverse configurations
Data Source
AI summary
An ear interface mode of headphones may be determined by measuring an acoustic response of the headphones. For example, the headphones may be determined to be in a leaky or sealed configuration. An adaptive noise cancellation (ANC) system may be controlled based on the determined ear interface mode of the headphones. For example, a set of configuration parameters may be loaded for the ANC system corresponding to the known ear interface mode. An anti-noise signal may be generated according to the selected configuration parameters, and that anti-noise signal added during playback of media, such as voice recordings, music, videos, or telephone call speech.