Wireless Audio Privacy Mute With Physical Microphone Disconnect
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Solution Overview
Problem
Voice integration devices lack a reliable privacy mode that prevents unauthorized data collection and is tamper-proof, allowing malicious software to compromise the mute function and continue data collection even when the device appears to be in privacy mode.
Innovation Solution
Implement a privacy mode that mechanically mutes the microphone, uses a physical disconnect or acoustic interference, and includes a true privacy indicator tied to the microphone's state, ensuring the device cannot be compromised by malicious software.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a software-based mute function is used, then the device can be easily controlled to enter privacy mode, but the device can be compromised by malicious software and continue data collection
Solution Approach 1:
The patent replaces the software-based mute function with a mechanical switch that physically disconnects the microphone from the circuit. This mechanical disconnection provides a tamper-proof privacy mode that cannot be compromised by malicious software, as the microphone is physically isolated from the device's processing circuits when the switch is in the privacy position.
2Adaptability or versatility
If the device continues to listen while muted, then acoustic data can be stored locally for later processing, but user privacy is compromised and confidence in privacy mode is reduced
Solution Approach 1:
The patent segments the audio processing system into distinct functional blocks: the microphone, the privacy switch, and the processing circuits. The mechanical switch creates a physical boundary that separates the microphone from the processing path when privacy mode is activated, ensuring that acoustic data cannot reach the processing circuits regardless of software state.
Solution Approach 2:
The patent extracts the microphone signal from the processing path by introducing a mechanical disconnect. When the privacy switch is activated, the microphone output is physically removed from the circuit path that leads to the processing circuits, preventing any local storage or processing of acoustic data while maintaining the ability to process audio when the switch is in the normal position.
3Adaptability or versatility
If multiple devices require individual mute activation, then each device can be independently controlled, but user convenience is reduced and operation becomes complex
Solution Approach 1:
The patent implements a universal remote control system that can activate privacy mode across multiple devices simultaneously. The remote control communicates with each device's mechanical switch mechanism, allowing a single user action to physically disconnect microphones on multiple devices at once, while each device retains its independent mechanical switch for local control when needed.
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
Provides a high-confidence privacy mode that ensures the device is truly inactive and not susceptible to malware, offering a user-friendly and secure way to disable audio processing.
Implementation Method 1
the state of the LED indicator is tied to the state of the microphone and not separately controllable by a control circuit
Data Source
AI summary
Devices that record data from a space, such as audio or video devices having microphones and/or cameras, may have a privacy mode which allows a user to temporarily prevent the device from recoding audio or video of the space. The privacy mode may be a privacy cover, button, airgap, or other mechanism to obfuscate the acoustic or video signal, or to remove power and/or communication from the camera, microphone, control circuit, or to the entire device itself. Additionally, the privacy mode may be remotely enabled for multiple devices in a space.