Audio Signal Processor Linear Sound Source Simulation
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Solution Overview
Problem
The existing loudspeaker systems in aircraft cabins require multiple loudspeakers for effective audio distribution, leading to complex installations, high power consumption, and maintenance challenges, while failing to ensure consistent audio quality and volume across the cabin.
Innovation Solution
A device with a processor unit that modifies audio signals to simulate a linear sound source by coherent coupling of multiple point sound sources, reducing the number of loudspeakers needed through spectral and chronological adjustments, and amplification to maintain audio quality and volume.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple loudspeakers are used for audio distribution in aircraft cabin, then audio coverage and quality are improved, but installation complexity and maintenance outlay increase
Solution Approach 1:
The patent combines multiple loudspeaker outputs into a single linear array configuration, merging their acoustic fields to create a unified sound distribution system. This reduces the number of separate installation units while maintaining comprehensive audio coverage throughout the cabin.
Solution Approach 2:
The patent introduces a signal processing system as an intermediary between the audio source and loudspeakers. This mediator processes and distributes audio signals to multiple loudspeakers in a coordinated manner, simplifying the overall system architecture and reducing installation complexity.
2Reliability
If multiple loudspeakers are deployed throughout the cabin, then audio quality at every point is improved, but power consumption increases
Solution Approach 1:
The patent merges the acoustic output of multiple loudspeakers into a coordinated linear array system, improving audio quality through constructive interference while allowing for more efficient power distribution compared to independent loudspeaker operation.
Solution Approach 2:
The patent employs periodic signal processing and timing adjustments in the linear array configuration, optimizing the acoustic output efficiency of each loudspeaker to reduce overall power consumption while maintaining audio quality.
3Reliability
If multiple loudspeakers are installed for comprehensive audio coverage, then audio perceptibility is improved, but maintenance outlay increases
Solution Approach 1:
The patent merges multiple loudspeaker units into a standardized linear array module, improving audio perceptibility while reducing maintenance complexity through modular design. This allows for easier replacement and maintenance of standardized units rather than individual customized loudspeakers.
4Reliability
If a plurality of loudspeakers is used for audio distribution, then audio signal coverage is improved, but the number of components and wiring complexity increase
Solution Approach 1:
The patent introduces a centralized signal processing system as an intermediary that manages audio signal distribution to multiple loudspeakers. This mediator consolidates control and wiring management, reducing overall wiring complexity while maintaining comprehensive audio signal coverage throughout the cabin.
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 reduces the number of loudspeakers required, simplifies installation and maintenance, and maintains consistent audio quality and volume across the cabin by simulating a linear sound source, resulting in reduced power consumption and installation complexity.
Implementation Method 1
For example, the modification of audio information can take the form of a spectral breakdown of the audio content
Implementation Method 2
the audio signals do not cancel each other out during output at the loudspeakers, but rather are superposed in such a way as to ensure good hearing quality
Implementation Method 3
The linear sound source can here be achieved via coherent coupling of a plurality of point sound sources, such as loudspeakers
Implementation Method 4
the processor unit is equipped to modify the audio information in such a way that sound sources to be connected to the respective outputs realize a quasi-linear sound source
Data Source
AI summary
A device for modifying audio signals to be output within a room is introduced. The device exhibits an input for supplying audio information and a processor unit for modifying the audio information. The device further exhibits at least two outputs for distributing respectively modified audio information. The processor unit is here adapted to modify the audio information in such a way that respective sound sources to be connected to the outputs simulate a linear sound source for outputting the audio information according to the audio signals. The linear sound source is here achieved via the coherent coupling of a plurality of point sound sources, for example loudspeakers.