Aircraft Audio Adjustment for Flight-State Hearing Compensation
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Solution Overview
Problem
Existing sound systems in aircraft fail to account for variations in passenger hearing characteristics due to changes in air pressure during flight states, leading to inconsistent audio perception across different flight phases and seat areas.
Innovation Solution
A sound adjustment device that adjusts sound frequencies and amplification based on flight states (ascending, descending, and level flight) and seat areas, using an input unit to detect flight states, a signal processing unit to modify audio signals, and an amplification unit to output adjusted audio signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a fixed amplification level is applied to all flight states, then the device complexity is reduced, but the audio quality and hearing compensation effectiveness deteriorate
Solution Approach 1:
The patent implements dynamic amplification by automatically adjusting the amplification level based on the detected flight state (ascending, descending, or level flight). The control unit switches between different amplification levels corresponding to different flight phases, making the system adaptive rather than static. This resolves the contradiction by allowing high audio quality through state-dependent adjustment while keeping the control logic relatively simple through automated state-based switching.
Solution Approach 2:
The patent changes the amplification parameter according to flight state. During ascending and descending phases, a first amplification level is applied, while during level flight, a second amplification level is used. This parameter adjustment based on operational conditions allows the system to optimize audio quality for each flight phase without requiring complex manual intervention, thereby balancing audio quality improvement with acceptable device complexity.
2Manufacturing precision
If amplification is increased for all frequencies, then the sound perception is improved, but the energy consumption increases
Solution Approach 1:
The patent applies different amplification levels to different flight states rather than uniformly amplifying all frequencies at all times. By identifying the specific flight state (ascending, descending, or level flight) and applying appropriate amplification only when needed, the system improves sound perception during critical phases while avoiding unnecessary energy consumption during level flight when less amplification is required.
Solution Approach 2:
The patent uses partial amplification by applying higher amplification only during specific flight states (ascending and descending) rather than continuously. This selective amplification approach provides sufficient sound perception improvement during phases where hearing thresholds change, while conserving energy during level flight phases where the effect is less pronounced.
3Adaptability or versatility
If the sound system does not adjust for flight states, then the device complexity is reduced, but the adaptability to different flight conditions deteriorates
Solution Approach 1:
The patent implements a feedback mechanism where the control unit detects the flight state (ascending, descending, or level flight) and automatically adjusts the amplification level accordingly. This closed-loop system continuously monitors flight conditions and adapts the audio output, providing high adaptability to different flight phases while maintaining relatively simple device complexity through automated control rather than manual adjustment mechanisms.
Data Source
AI summary
A sound adjustment method of an aircraft is provided. The sound adjustment method includes acquiring a sound signal; acquiring flight state information of the aircraft; amplifying the sound signal having a first frequency or lower when the flight state information indicates ascending or descending of the aircraft; and amplifying the sound signal having a second frequency or lower when the flight state information indicates level flight of the aircraft. The second frequency is lower than the first frequency. The amplified sound signal is output.