Adaptive Speaker Tuning for Variable Enclosure Volume
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Solution Overview
Problem
The decreasing form factor of tablets and convertible notebooks makes it challenging to produce desirable audio performance, particularly low-frequency sounds, due to the limited acoustic volume required for resonance.
Innovation Solution
An adaptive audio processing method that determines a physical quantity indicative of the variable acoustic volume enclosed by structural members of an information handling system and applies an adaptive audio response to audio input signals to enhance sound output, using sensors and a processor to adjust the audio response based on the acoustic volume.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the form factor of tablets and convertible notebooks is reduced to make them thinner, then the portability and compactness are improved, but the acoustic volume available for low-frequency sound reproduction deteriorates
Solution Approach 1:
The system dynamically adjusts audio processing parameters based on real-time detection of device orientation and enclosure volume using sensors (accelerometers, gyroscopes). The audio response is continuously adapted as the device transitions between different orientations (e.g., laptop mode, tablet mode, handheld mode), allowing optimal bass reproduction for each configuration without requiring physical volume changes.
Solution Approach 2:
The system changes audio processing parameters (equalization curves, bass enhancement levels, crossover frequencies) based on detected enclosure volume conditions. By monitoring physical quantity data from sensors, the system selects from multiple pre-configured audio profiles or dynamically adjusts parameters to compensate for limited acoustic volume, thereby maintaining desirable bass response in thin device form factors.
2Adaptability or versatility
If fixed audio tuning parameters are used in devices with variable enclosure volumes, then the device complexity is reduced, but the audio performance across different orientations and configurations deteriorates
Solution Approach 1:
The system implements a feedback loop where sensors continuously monitor device orientation and enclosure volume, feed this information to the audio processing system, which then adjusts audio parameters accordingly. This closed-loop control enables automatic adaptation to different device configurations without user intervention, maintaining high audio performance across varying conditions.
Solution Approach 2:
The audio processing system is designed to handle multiple device configurations and orientations through a single unified adaptive framework. The same sensor input and processing architecture serves various modes (laptop, tablet, handheld, folded configurations), eliminating the need for separate tuning systems for each configuration and reducing overall system complexity.
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 approach improves the audio performance of information handling systems by compensating for the limited acoustic volume, enabling better reproduction of low-frequency sounds and overall audio quality.
Implementation Method 1
low frequencies often require larger acoustic volumes in which such low-frequency sounds may resonate
Implementation Method 2
an adaptive audio response to an audio input signal to generate an audio output signal
Data Source
AI summary
In accordance with embodiments of the present disclosure, a system may include an audio input for receiving an audio input signal for reproduction at a speaker, a sensor input for receiving at least one sensor signal indicative of a physical quantity indicative of a variable acoustic volume to which an acoustic output of a speaker generates sound, wherein the acoustic volume is partially enclosed by structural members of an information handling system comprising the speaker, an output for generating an audio output signal to the speaker, and a processor configured to apply an adaptive audio response to the audio input signal to generate the audio output signal, wherein the adaptive audio response is a function of the physical quantity.