Aircraft Audio Equalizer Mapping for Low-Cost Earphones
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Solution Overview
Problem
Inexpensive earphones used in aircraft lack individual information for identification, making it difficult to reproduce music with appropriate characteristics.
Innovation Solution
An equalizer setting information system for aircraft entertainment systems that includes a storage medium interface, a device identifying section, an equalizer information reading section, and an equalizer setting section to adjust sound gain based on acquired information, allowing for appropriate audio tone correction without individual earphone information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If individual information is stored in earphones for identification, then audio reproduction characteristics can be optimized for each earphone, but earphone cost increases
Solution Approach 1:
The patent uses a database to store equalizer setting information that copies or replicates the individualization function. Instead of embedding individual information in each earphone, the system creates a digital copy of earphone characteristics in a database, allowing the audio system to identify and optimize for each earphone type without modifying the physical earphone hardware.
Solution Approach 2:
The patent introduces an intermediary database and control system between the audio reproduction device and the earphone. This intermediary layer stores earphone characteristic information and mediates the audio output by applying appropriate equalizer settings, eliminating the need for individual information storage in the earphone itself.
2Manufacturing precision
If equalizer setting information is stored in association with device identification, then appropriate audio correction can be applied, but system complexity increases
Solution Approach 1:
The patent creates a universal database structure that can store and manage equalizer setting information for multiple different audio reproduction devices. The system uses a standardized approach where device identification information is associated with corresponding equalizer settings, allowing the same database mechanism to serve various device types without requiring device-specific complex structures.
Data Source
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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. Earphones used in the aircraft are variable according to an aircraft company, and audio reproduction devices used with the earphones are variable according to an aircraft company or a flight number, therefore, it is necessary to prepare a plural of equalizer settings and to select and apply a proper equalizer setting according to a combination of earphones and audio reproduction devices. An equalizer setting information setting system (200) for an aircraft entertainment system includes a storage medium interface (105) that reads data from a recording medium (211) that stores a plurality of data, in which first information (212) including information about equalizer setting and second information (213) for identifying an audio reproduction device, to which the information about equalizer setting is applied, are associated with each other; a device identifying section (221) that acquires third information for identifying an audio reproduction device that a passenger uses; an equalizer information reading section (222) that reads from the storage medium the first information associated with the second information corresponding to the third information; and an equalizer setting section (223) that changes sound gain of the audio reproduction device using the information read by the equalizer information reading section, so as to set an equalizer of the audio reproduction device.