Audio Device Near-Field Sound Detection and Playback Management
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing personal audio devices struggle to effectively detect and respond to ambient events, such as near-field sound, proximity sound, and tonal alarms, due to limitations in existing event detection methods which often result in false detections and poor user experience.
Innovation Solution
The implementation of a method and integrated circuit in an audio device that uses multiple microphones and processors to detect near-field, proximity, and tonal alarm events through spatial processing and decision fusion logic, modifying audio playback characteristics in response to persistent events, while employing hold-off and hang-over logic to validate instantaneous detections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple microphones and spatial processing are used to detect ambient events, then detection accuracy is improved, but device complexity increases
Solution Approach 1:
The patent segments the detection task into distinct event types (near-field sound, proximity sound, tonal alarm) and processes each through specialized detection pathways. Multiple microphones are divided into different functional groups for different detection purposes, allowing complex spatial processing to be broken into manageable segments that improve accuracy without overwhelming system complexity
Solution Approach 2:
The patent transitions from single-microphone temporal analysis to multi-microphone spatial analysis by adding the spatial dimension. Direction of arrival estimation and spatial filtering leverage the third dimension (space) to distinguish between different sound sources and types, significantly improving detection accuracy while the modular implementation keeps complexity manageable
2Measurement precision
If event detection sensitivity is increased to catch all ambient events, then event detection capability is improved, but false detection rate increases
Solution Approach 1:
The patent implements feedback mechanisms where detection results from multiple microphones and multiple event types are continuously monitored and fed back into the detection algorithm. This allows the system to learn from false detections and adjust sensitivity thresholds dynamically, improving event detection capability while reducing false alarm rates through iterative optimization
Solution Approach 2:
The patent employs adjustable detection parameters and thresholds that can be changed based on environmental conditions and user preferences. By dynamically modifying detection sensitivity parameters, the system can maintain high event detection capability while adapting to reduce false detections in different acoustic environments
3Ease of operation
If playback signal is continuously monitored and modified based on ambient events, then user experience is improved, but energy consumption increases
Solution Approach 1:
The patent implements periodic event detection and playback modification rather than continuous monitoring. The system checks for ambient events at defined intervals and only modifies playback when events are detected, maintaining good user experience by responding to important events while significantly reducing energy consumption compared to continuous real-time processing
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
Enhances user experience by accurately detecting and responding to ambient events, reducing false alarms and improving playback management, ensuring that important sounds are not missed while maintaining uninterrupted listening when desired.
Implementation Method 1
receiving at least one input signal indicative of ambient sound external to the audio device
Data Source
AI summary
In accordance with embodiments of the present disclosure, a method for processing audio information in an audio device may include reproducing audio information by generating an audio output signal for communication to at least one transducer of the audio device, receiving at least one input signal indicative of ambient sound external to the audio device, detecting from the at least one input signal a near-field sound in the ambient sound, and modifying a characteristic of the audio information reproduced to the at least one transducer in response to detection of the near-field sound.