Smartphone Case with Active Noise Cancellation for Privacy
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Solution Overview
Problem
Modern smartphones are designed with microphones always on, enabling constant surveillance and potential interception of conversations, compromising user privacy, as they must constantly listen for voice-activated commands and transmit all voice signals, making private conversations vulnerable to electronic intercept.
Innovation Solution
A battery-equipped cellular telephone case with internal sound generation and layered sound blockage, featuring a self-contained battery-powered speaker to create a sonic 'jam' and sound insulation, including air gaps, sound-deadening materials, and active noise cancellation, to restrict sound entry into the smartphone microphone.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the smartphone microphone is kept always on to enable voice-activated commands, then the device can respond to user commands, but user privacy is compromised due to constant surveillance and potential interception of conversations
Solution Approach 1:
The patent introduces a case with active noise cancellation technology as an intermediary between the user and the smartphone microphone. The case generates anti-phase sound waves that cancel out external sounds before they reach the microphone, effectively blocking surveillance while allowing the user to control when the microphone is active through deliberate actions like removing the case or pressing a button.
Solution Approach 2:
The case applies preliminary anti-action by generating noise cancellation signals in advance to counteract potential surveillance. The active noise cancellation system continuously monitors and counteracts sounds before they can be captured by the microphone, preemptively preventing privacy intrusion while maintaining the microphone's operational status.
2Speed
If the smartphone constantly registers all sounds for voice-activated commands, then the device can activate commands quickly, but all voice signals are transmitted to remote computers enabling electronic interception
Solution Approach 1:
The case acts as an intermediary that selectively blocks sound transmission. The active noise cancellation technology cancels out sounds from specific directions (particularly from behind the device) while allowing sounds from the front to pass through, enabling the system to distinguish between legitimate user commands and potential surveillance attempts.
Solution Approach 2:
The patent applies local quality by creating directionally selective sound blocking. The case differentiates between sounds coming from different directions, allowing voice commands from the user's position while blocking sounds from surveillance devices located in other directions, thus enabling fast activation without universal transmission.
3Object-affected harmful factors
If sound-deadening materials and air gaps are added to the case to block sound entry, then microphone capture is reduced, but device complexity and manufacturing difficulty increase
Solution Approach 1:
The patent applies parameter changes by using active noise cancellation technology that dynamically adjusts sound wave parameters (amplitude, phase, frequency) to counteract external sounds. This approach achieves sound blocking without requiring complex physical structures like thick sound-deadening materials or multiple air gaps, thereby reducing manufacturing complexity while maintaining effectiveness.
Data Source
AI summary
The subject matter herein field is for multiple and complimentary systems in the structure of a cellular device case so as to provide sound jamming and/or sound insulation, and/or powered noise cancellation as means of restriction the entry of useful sound into the microphone(s) of cellular smartphone devices, as a means of citizen counter-action of the “constant surveillance” characteristics inherent in the “always on,” microphone systems as described under Background of the Subject matter, above.