Multi-Driver Audio Playback for Wider Balanced Listening Areas
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Solution Overview
Problem
Existing media playback systems often limit the perceivable balanced directional effect of multi-channel audio to specific locations, as listeners closer to one audio driver set may predominantly hear that channel, while those closer to another set may predominantly hear the other, due to inherent radiation patterns of audio drivers.
Innovation Solution
Implement signal processing to manipulate input signals for each audio driver, creating target radiation patterns that compensate for inherent patterns, thereby expanding the area where a balanced directional effect is perceivable.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If signal processing is implemented to manipulate input signals for each audio driver, then the perceivable balanced directional effect is expanded to a wider listening area, but the device complexity increases
Solution Approach 1:
The patent applies parameter changes by manipulating input signal parameters (amplitude, phase, frequency) for each audio driver based on its inherent radiation pattern characteristics. Transfer functions are used to adjust these parameters dynamically, transforming the radiation patterns to achieve balanced directional effects across a wider listening area while managing system complexity through parameter optimization.
Solution Approach 2:
The patent implements local quality by applying different signal processing parameters to each individual audio driver based on its specific radiation pattern characteristics. Each driver receives customized input signals tailored to its local acoustic properties, enabling the system to achieve balanced directional effects across multiple locations without requiring uniform processing across all drivers.
2Adaptability or versatility
If multiple audio drivers with different inherent radiation patterns are used, then the audio system can provide multi-channel playback, but the balanced directional effect is limited to specific locations
Solution Approach 1:
The patent uses parameter changes to compensate for the inherent radiation pattern differences of multiple audio drivers. By dynamically adjusting input signal parameters (amplitude, phase, frequency) for each driver based on its characteristics and the desired listening positions, the system maintains balanced directional effects across a wider area while preserving multi-channel playback capabilities.
Solution Approach 2:
The patent employs feedback mechanisms where the system determines transfer functions based on the inherent radiation patterns of audio drivers and the characteristics of listening positions. This feedback loop enables the system to automatically adjust signal parameters to achieve balanced directional effects across multiple locations, resolving the limitation of fixed listening areas in multi-channel systems.
Data Source
AI summary
Example techniques relate to audio generation in a media playback system. Based on one or more first functions and first characteristics of an area, the system may generate first audio that includes a first audio signal and a second audio signal. The system provides the first audio signal to at least one first audio driver and the second audio signal to at least one second audio driver, thereby causing a first playback device and a second playback device to play back the first audio synchronously. The system receives second characteristics of the area and based on one or more second functions and the second characteristics, generates second audio comprising a third audio signal and a fourth audio signal. The system provides the third audio signal to the at least one first audio driver and the fourth audio signal to the at least one second audio driver.