Headset Voice Activity Detection Auto-Mode Switching
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Solution Overview
Problem
Existing headsets with noise cancelling functions require manual activation of hear-through modes, which can be inconvenient, especially in situations where the user needs to engage in conversations with others in their vicinity without removing the headset.
Innovation Solution
A headset with an electronic noise cancelling circuit and a voice activity detection unit that automatically switches between active noise cancelling and hear-through modes based on the detection of ambient audio and user speech, allowing for seamless conversation without manual intervention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If manual switch is provided for hear-through mode, then user can control when to hear ambient audio, but user convenience deteriorates due to required manual intervention
Solution Approach 1:
The headset automatically detects when the user is speaking and switches to hear-through mode without manual intervention. The system monitors audio signals, detects speech patterns, and autonomously adjusts the audio mode, allowing the device to serve itself rather than requiring user control.
Solution Approach 2:
The system continuously monitors audio input from microphones, analyzes speech patterns, and uses this feedback to automatically switch between noise cancelling and hear-through modes. The detection of user speech provides real-time feedback that triggers mode transitions.
2Ease of operation
If automatic hear-through mode switching is implemented, then user convenience improves, but device complexity increases due to additional detection and switching components
Solution Approach 1:
The existing microphones and audio processing circuits are used for multiple purposes: both for noise cancellation and for speech detection. The system leverages the universal functionality of existing components to enable automatic mode switching without adding dedicated detection hardware.
Solution Approach 2:
The speech detection function is merged with the existing audio processing pipeline. The same audio signals used for noise cancellation are also analyzed for speech patterns, combining multiple functions into a unified processing approach that minimizes additional components.
3Object-affected harmful factors
If noise cancelling is always active, then ambient noise is reduced, but user's ability to converse with nearby persons deteriorates
Solution Approach 1:
The audio mode dynamically transitions between noise cancelling and hear-through based on real-time speech detection. When speech is detected, the system switches to hear-through mode to enable natural conversation, and returns to noise cancelling mode when speech stops, creating adaptive behavior that responds to user needs.
Solution Approach 2:
The system automatically determines when conversation is needed by detecting user speech patterns, and autonomously switches modes accordingly. The device monitors its own operational context and adjusts audio processing to match the user's immediate needs without external input.
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
Enables users to engage in conversations with others nearby while wearing the headset by automatically switching to hear-through mode when not in a call and detecting user speech, enhancing comfort and convenience in noisy environments.
Implementation Method 1
Active noise reduction headsets typically comprise electronic circuits which are used to generate anti-noise signals which destructively interfere with ambient sound to cancel the ambient sound
Implementation Method 2
a voice activity detection unit configured to indicate when a user speaks
Data Source
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AI summary
A headset for voice communication is disclosed, the headset comprising at least one earphone having a speaker and one or more microphones. The headset is configured to be operated in a first mode in which an electronic noise cancelling circuit is configured to receive ambient audio via at least a first of the one or more microphones to implement an active noise cancelling function and to provide a noise cancelling audio signal to the speaker, and in a second mode in which ambient audio is provided as a hear-through audio signal to the speaker. The headset for voice communication is configured to detect whether a call is ongoing, and to provide a call signal in response to the detection. The headset comprises the electronic noise cancelling circuit, a voice activity detection unit configured to indicate when a user speaks, a switching element configured to switch the headset between operating in the first mode and operating in the second mode, wherein, when the headset is operated in the first mode and the call signal indicates that the user is not in a call, the switching element is configured to switch the headset from operating in the first mode to operating in the second mode when the voice activity detection unit indicates that the user speaks.