Vehicle Microphone Control for Multi-Passenger Call Audio
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Solution Overview
Problem
Conventional microphone systems in vehicles fail to effectively filter out unwanted ambient noise and irrelevant audio during audio calls, leading to distractions and inconvenience, especially when multiple people are involved, and using a mobile device for private calls is unsafe and sometimes illegal.
Innovation Solution
The system uses an audio playback manager to identify the locations and relevance of individuals in a vehicle through facial recognition or voice recognition, adjusting audio input from multiple microphones based on who is actively speaking or relevant to the call, and selectively muting or filtering out unwanted noise.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple microphone devices are placed throughout the vehicle to enable all passengers to participate in audio calls, then the interactive experience and accessibility of audio calls is improved, but unwanted ambient noise and irrelevant audio from multiple sources are captured, causing distractions and reducing call quality
Solution Approach 1:
The audio system is segmented into multiple independent microphone devices distributed throughout the vehicle, each capable of being independently controlled. The system divides the audio input into separate channels corresponding to different passenger locations, allowing selective activation of specific microphones based on who is speaking or relevant to the call, thereby capturing relevant audio while excluding ambient noise from other sources
Solution Approach 2:
The microphone system transitions from a static configuration where all microphones are continuously active to a dynamic system that automatically adjusts which microphones are active based on real-time detection of speaking passengers. The system dynamically switches between different microphone sources and adjusts their gain levels according to the current conversation context, ensuring only relevant audio is captured while filtering out unnecessary ambient noise
2Ease of operation
If all microphone devices remain active continuously to capture audio from any passenger, then accessibility and ease of operation are improved, but audio quality and focus deteriorate due to capturing irrelevant audio and distractions
Solution Approach 1:
The system implements feedback mechanisms where audio from each microphone is continuously monitored and analyzed to detect which passenger is currently speaking. Based on this feedback, the system automatically adjusts the gain and activation state of each microphone in real-time, ensuring that the microphone closest to the active speaker is prioritized while others are muted or reduced, thereby maintaining high audio quality without requiring manual intervention
Solution Approach 2:
The audio system performs self-service by automatically detecting which passenger is speaking and autonomously adjusting the microphone configuration without user intervention. The system identifies the relevant speaker, activates the corresponding microphone, and mutes others, thereby maintaining ease of operation while ensuring reliable audio quality through automated audio quality management
Data Source
AI summary
In aspects of adjusting audio input in a vehicle, a vehicle audio system implements an audio playback manager that detects a location of a first person in the vehicle, the first person located in proximity of a first microphone device configured to receive audio input for an audio call. The audio playback manager also detects an additional location of a second person in the vehicle, the second person located closer to a second microphone device than the first microphone device, the second microphone device configured to receive the audio input for the audio call. The audio playback manager adjusts the audio input received by at least one of the first microphone device or the second microphone device based on whether the first person or the second person is actively speaking or is a subject of a conversation of the audio call.