Audio-Activated Device Privacy Through Distorted Noise Projection
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Solution Overview
Problem
Audio-activated devices lack a mechanism to selectively turn off their always-listening feature while maintaining voice-activated commands, raising privacy concerns due to constant audio recording and potential data breaches.
Innovation Solution
Systems and devices generate a distorted ambient noise signal to disrupt ambient noise received by microphones, analyze it for audio triggers, and selectively communicate undistorted noise to the device, while optionally obscuring camera functions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If audio-activated devices continuously monitor ambient noise for voice commands, then voice-activated functionality is maintained, but user privacy is compromised due to constant audio recording
Solution Approach 1:
The system applies preliminary anti-action by generating and projecting distorted ambient noise signals toward the device's microphone before actual voice commands are detected. This pre-emptive distortion prevents unauthorized audio recording while maintaining the ability to detect legitimate voice commands when undistorted noise is projected.
Solution Approach 2:
The system dynamically switches between two states: projecting distorted ambient noise to block unauthorized recording, and projecting undistorted ambient noise to enable voice command detection. This dynamic transition allows the system to adapt its behavior based on user control signals, resolving the contradiction between privacy protection and functionality.
2Object-affected harmful factors
If a mechanism is added to selectively block ambient noise, then user privacy is enhanced, but device complexity increases
Solution Approach 1:
The system achieves multi-functionality by using the existing speaker components to serve dual purposes: normal audio output and projection of distorted/undistorted ambient noise signals. This eliminates the need for separate dedicated noise blocking hardware, thereby enhancing privacy without proportionally increasing device complexity.
Solution Approach 2:
The system performs self-service by using its own speaker components to project noise signals that block unauthorized audio recording. The device leverages its existing infrastructure (speakers and processors) to create privacy protection mechanisms, avoiding the need for external or additional specialized equipment.
3Object-affected harmful factors
If distorted ambient noise is continuously projected to block audio triggers, then unauthorized recording is prevented, but legitimate voice commands cannot be detected
Solution Approach 1:
The system dynamically transitions between projecting distorted ambient noise (to prevent unauthorized recording) and undistorted ambient noise (to enable voice command detection). This dynamic state change is triggered by user control signals, allowing the system to resolve the contradiction between security and functionality based on real-time user intent.
Solution Approach 2:
The system incorporates feedback mechanisms where user control signals determine whether distorted or undistorted noise is projected. This feedback loop ensures that voice command detection is enabled only when the user intentionally activates the undistorted noise projection mode, preventing legitimate commands from being blocked while maintaining privacy protection during normal operation.
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 privacy by preventing unauthorized audio and video recording, ensuring secure communication with audio-activated devices and maintaining user control over their operations.
Implementation Method 1
The distorted ambient noise signal may be provided to a speaker that is proximate to a microphone of the audio-activated device so that the speaker may project sound corresponding to the distorted ambient noise into the microphone of the audio-activated device
Data Source
AI summary
Systems and devices may receive an ambient noise signal and use that ambient noise signal to generate a distorted ambient noise signal that may be provided to a speaker that is proximate to a microphone of the audio-activated device so that the speaker may project sound corresponding to the distorted ambient noise into the microphone of the audio-activated device so that, for example, that the audio-activated device cannot decipher speech and other sounds in the ambient noise of an environment. While the distorted ambient noise is being projected into the microphone of the audio-activated device, it may be scanned and/or analyzed to determine whether an audio trigger (e.g., an audio trigger or phrase) is included therein and, if so, an undistorted ambient noise signal may be communicated to the speaker of the audio-activated device so that the audio-activated device may respond to a command included in the ambient noise.