Pressure-Based Audio Gain Control for Mobile Call Sound Quality
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Solution Overview
Problem
Mobile phone users often experience suboptimal audio gain during calls due to bandwidth limitations and ambient noise, requiring manual volume and positional adjustments to improve sound quality and intelligibility.
Innovation Solution
A method and apparatus that automatically adjusts the gain of a mobile device's audio transducer by detecting pressure applied to the multi-touch screen, using a user's pre-established pressure profile to identify the user and retrieve settings for dynamic gain adjustment based on the detected pressure, thereby enhancing sound quality without user intervention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If manual volume and positional adjustments are required to improve sound quality, then audio gain can be optimized, but user convenience and ease of operation deteriorate
Solution Approach 1:
The system automatically adjusts audio gain based on detected pressure applied to the device, eliminating the need for manual user intervention. The device monitors pressure sensor data and autonomously modifies transducer gain to optimize sound quality during calls.
Solution Approach 2:
The system implements a feedback loop where pressure sensor measurements are continuously monitored and used to dynamically adjust audio gain. The detected pressure serves as feedback that triggers automatic gain modification to maintain optimal audio quality.
2Ease of operation
If automatic gain adjustment based on pressure is implemented, then ease of operation improves, but device complexity increases
Solution Approach 1:
The pressure sensor serves multiple functions: it detects both touch input for user interface interactions and pressure magnitude for automatic gain control. This multi-functionality reduces the need for additional dedicated sensors or components.
Solution Approach 2:
The system combines existing pressure sensing capabilities with audio processing functions, merging the touch detection infrastructure already present in the device with automatic gain control to minimize additional hardware complexity.
3Adaptability or versatility
If pressure detection is used to identify users and apply settings, then adaptability improves, but measurement precision requirements increase
Solution Approach 1:
User pressure profiles are pre-established and stored before actual use. During calls, the system compares real-time pressure measurements against these pre-stored profiles to identify users and apply their preferred settings, reducing the need for high-precision real-time measurements.
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
The solution dynamically improves sound quality by automatically adjusting the audio transducer gain in real-time based on user-specific settings, ensuring optimal audio output and reducing the need for manual adjustments, thereby enhancing user experience in various environments.
Implementation Method 1
pressure applied to the multi-touch screen by a user is detected
Data Source
AI summary
A method and apparatus is provided for adjusting the gain imparted to a signal by an audio transducer such as a microphone and/or a speaker, which is employed by an electronic device having a multi-touch screen user input. The method begins when pressure applied to the multi-touch screen by a user is detected. The pressure is detected while the user is providing or receiving audible signals to or from, respectively, the audio transducer. Next, the user is identified based on a pre-established user profile that identifies the user based on a pressure profile that is obtained by the multi-touch screen. The pressure profile represents at least a contour of a portion the user's head such as the user's ear, cheek or the like. Once the user has been identified, pre-established user-selectable settings associated with the identified user are retrieved from memory. Finally, the gain imparted to the signal by the audio transducer is adjusted upward or downward based at least in part on the detected pressure and in accordance with the user-selectable settings.