Acoustic Biometric Authentication via Microphone
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Solution Overview
Problem
There is a need for a low-power and reliable authentication method for devices like smartphones and tablets that can securely access sensitive information without requiring password entry, while also enabling touch detection on touch screens.
Innovation Solution
An array of pressure sensors with a flexible plate and integrated circuitry that senses changes in capacitance or vibrational characteristics, allowing for secure authentication and touch detection by differentiating between touch events and fingerprint ridges, and even sensing biometric data like heart rate and temperature.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If traditional authentication methods (passwords) are used, then security is maintained, but user convenience deteriorates due to the need to enter passwords
Solution Approach 1:
The patent replaces manual password entry with automated biometric authentication using acoustic signals from the user's voice or breathing patterns. The system captures acoustic data through a microphone, processes it to extract biometric features, and performs authentication without requiring physical keyboard interaction, thereby improving ease of operation while maintaining security through unique physiological characteristics
Solution Approach 2:
The system creates an acoustic copy or model of the user's unique physiological signals (voice print, breathing pattern) during enrollment, then compares subsequent acoustic inputs against this stored model. This allows automated recognition of the user's identity based on their natural acoustic signature rather than requiring them to recall and enter a password
2Reliability
If fingerprint sensors are used for authentication, then security is improved, but power consumption increases
Solution Approach 1:
The patent replaces contact-based fingerprint sensors with a contactless acoustic sensing system using a standard microphone. This eliminates the need for specialized high-power sensor hardware, allowing the use of low-power existing audio components already present in mobile devices for both voice command recognition and biometric authentication
Solution Approach 2:
The system uses the device's existing microphone for multiple purposes: voice commands, ambient noise cancellation, and biometric authentication. By making the acoustic sensor multi-functional, the patent avoids adding dedicated high-power authentication hardware, thereby reducing overall power consumption while maintaining authentication security
3Adaptability or versatility
If touch sensors are added to detect touch events, then functionality is improved, but device complexity increases
Solution Approach 1:
The patent makes the acoustic microphone serve dual functions: capturing voice/breathing patterns for authentication and detecting touch events through acoustic disturbances. When a user touches the device, it creates sound waves that the microphone detects, allowing touch detection without adding separate sensor hardware, thus improving functionality while minimizing increased device complexity
Solution Approach 2:
The system merges the authentication function and touch detection function into a single acoustic sensing pathway. The same microphone and signal processing pipeline that analyze vocal characteristics for authentication also detect acoustic signatures of touch events, combining multiple functions into one integrated system rather than using separate dedicated sensors
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
This solution provides secure, low-power authentication and touch detection, enabling convenient access to sensitive information and biometric data analysis, distinguishing between intended and unintended touches, and confirming user identity through multiple biometric indicators.
Implementation Method 1
integrated circuitry communicatively coupled to the pressure-sensor arrangement that senses pressure changes exhibited by changes in capacitance or vibrational characteristics
Data Source
AI summary
Aspects of the present disclosure are directed towards methods, systems, and apparatuses that include a pressure-sensor arrangement including a plate structure and a plurality or array of pressure-sensor cells. Additionally, the methods, systems, and apparatuses include integrated circuitry communicatively coupled to the pressure-sensor arrangement that senses pressure changes exhibited by changes in capacitance or vibrational characteristics.