Playback Device Calibration Interface for Spatial and Spectral Tuning
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Solution Overview
Problem
Existing media playback systems lack effective methods for calibrating playback devices to optimize audio performance in different environments, leading to inconsistent sound quality across multiple zones and locations.
Innovation Solution
A control device facilitates calibration by detecting sound waves emitted by playback devices, analyzing them to determine spatial and spectral adjustments, and guiding users through calibration sequences to improve sound quality in specific listening areas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If media playback systems use standard playback configurations without calibration, then device complexity is reduced and ease of operation is improved, but sound quality consistency across multiple zones and locations deteriorates
Solution Approach 1:
The system performs automatic calibration using the control device's existing microphone and processor capabilities. The playback device emits test tones and the control device analyzes the acoustic environment, allowing the system to self-calibrate without requiring external calibration equipment or complex manual procedures.
Solution Approach 2:
The control device serves as an intermediary between the playback device and the acoustic environment. It captures test tones through its microphone, processes the acoustic data, and communicates calibration parameters back to the playback device, enabling calibration without requiring dedicated calibration hardware.
2Manufacturing precision
If media playback systems implement calibration sequences, then sound quality in specific listening areas is improved, but ease of operation deteriorates due to user guidance requirements
Solution Approach 1:
The system implements feedback through the control device displaying visual indicators that guide users through the calibration process. The control device shows which test tones are being played and provides real-time feedback on calibration progress, making the process more intuitive and easier to follow.
Solution Approach 2:
The system performs preliminary actions by automatically emitting test tones and capturing acoustic data before final calibration is applied. The control device pre-processes the acoustic environment data and prepares calibration parameters in advance, reducing the complexity of real-time calibration operations.
3Measurement precision
If calibration sequences are implemented with user guidance, then measurement precision of acoustic environment is improved, but loss of time increases due to calibration duration
Solution Approach 1:
The calibration process uses periodic test tones emitted by the playback device at different frequencies and locations. The control device captures these periodic signals and analyzes them to build a comprehensive acoustic model of the environment, achieving high measurement precision through repeated measurements.
Solution Approach 2:
The system performs preliminary acoustic measurements and data processing in advance during the test tone emission phase. The control device captures and pre-processes acoustic data before final calibration calculations are made, reducing the time required for the actual calibration application and minimizing overall calibration duration.
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
Enhances audio performance by optimizing playback device configurations for spatial and spectral characteristics, ensuring consistent sound quality across different environments and use cases.
Implementation Method 1
A control device, such as a smartphone or tablet computer, may display a user interface to facilitate the calibration of a playback device within a particular location of a given environment. The calibration sequence may involve the control device listening for test tones emitted by the playback device.
Data Source
AI summary
Example techniques relate to calibration interfaces that facilitate calibration of a playback device. An example implementation may involve outputting a sequence of prompts to guide calibration of a playback device during a calibration sequence comprising (i) a spatial calibration component and (ii) a spectral calibration component. Outputting the sequence of prompts includes outputting one or more first audio prompts representing a guide to perform the spatial calibration component of the calibration sequence. The spatial calibration component involves calibration of the playback device for a particular location within an environment. Outputting the sequence of prompts also includes outputting one or more first second prompts representing a guide to perform the spectral calibration component of the calibration sequence. The spectral calibration component involves calibration of the playback device for the environment.