Aircraft Audio Equalizer Profiles for Earphone and Cabin Noise Matching
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Solution Overview
Problem
Inexpensive earphones used in aircraft lack individual information for identification, and sound output is often masked by aircraft noise, requiring frequency emphasis that varies with the environment.
Innovation Solution
An audio tone correction system that includes a storage medium interface, device installation position acquiring section, correction method determining section, and equalizer setting section to adjust sound gain based on earphone and audio reproduction device characteristics, considering noise conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If individual information is added to earphones for identification, then audio characteristics can be customized for each earphone, but the cost of earphones increases
Solution Approach 1:
The patent introduces an audio reproduction device as an intermediary that stores and applies equalizer setting information corresponding to different earphone types. Instead of embedding identification information in each earphone, the system uses the audio reproduction device to identify earphone characteristics and apply appropriate audio processing, thereby achieving customized audio characteristics without increasing earphone manufacturing cost
Solution Approach 2:
The patent creates a database of equalizer setting information that copies or represents the acoustic characteristics of different earphone types. Rather than modifying each physical earphone, the system stores digital representations of earphone characteristics and applies corresponding correction algorithms, achieving customization through information copying rather than physical modification
2Manufacturing precision
If frequency emphasis is applied to overcome aircraft noise, then audio quality improves in noisy environments, but the frequency range and degree of emphasis must be determined for each specific environment
Solution Approach 1:
The patent pre-prepares multiple equalizer setting information profiles corresponding to different earphone types and noise environments before actual use. The audio reproduction device stores these pre-configured settings and automatically selects and applies the appropriate profile based on detected conditions, eliminating the need for real-time complex adjustments and simplifying the environmental adaptation process
Solution Approach 2:
The patent changes the equalizer setting parameters (frequency range and degree of emphasis) based on the detected noise environment and earphone type. By dynamically adjusting these parameters according to pre-stored profiles, the system achieves optimized audio quality for each specific environment without requiring complex real-time analysis or user intervention
3Manufacturing precision
If equalizer setting information is prepared for each combination of earphone and environment, then audio quality is optimized, but the quantity of setting information increases
Solution Approach 1:
The patent segments the equalizer setting information into two separate components: earphone characteristic information and environment-specific adjustment parameters. This segmentation allows the system to store base earphone profiles once and then apply smaller environment-specific correction layers, reducing the total information volume compared to storing complete separate profiles for every combination
Solution Approach 2:
The patent creates a universal equalizer setting information structure that can be applied across multiple earphone types and environments. By designing a modular information system where core settings are reusable and only specific parameters need adjustment for different conditions, the system achieves optimized audio quality for all combinations without proportionally increasing the total information storage requirement
Data Source
AI summary
To provide a high quality listening experience for passengers using inexpensive earphones distributed in an aircraft, equalizer setting according to the characteristics of earphones is necessary. When using earphones in an aircraft, due to a noise of engine or something, a certain frequency range has a possibility to be masked by the noise. The situations of noise is much different, according to an environment in which the earphones are used.A system (1100) for setting an audio reproduction device used by an aircraft passenger includes a storage medium interface (105) that reads data from a recording medium (211) that stores first information about equalizer setting (212); a device installation position acquiring section (1221) that acquires information for identifying installation position of the audio reproduction device that the passenger uses; a correction method determining section (1222) that determines a correction algorithm for the first information about equalizer setting (212), by using the information acquired by the device installation position acquiring section; an equalizer setting information generating section (1223) that generates second information about equalizer setting, by using the first information about equalizer setting (212) read from the recording medium (211) and the correction algorithm determined by the correction method determining section; and an equalizer setting section (223) that changes a gain of sounds reproduced by the audio reproduction device, by using the second information about equalizer setting, so as to set an equalizer (225) of the audio reproduction device.