In-Vehicle Hearing Test Calibration for Head Position Variability
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Solution Overview
Problem
Conventional hearing tests conducted in vehicles lack accuracy due to the inability to account for the position of the occupant's head within the passenger compartment, leading to inconsistent sound perception and potentially inaccurate results.
Innovation Solution
A system utilizing a computer with a processor and memory to detect the occupant's head position and adjust sound output based on this position, ensuring that sound amplitudes and frequencies are optimized for accurate hearing testing by selecting appropriate amplitudes for each side of the compartment and limiting sound output based on test results.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional hearing tests are conducted in vehicles without accounting for head position, then the testing can be performed anywhere, but the accuracy of hearing assessment deteriorates due to inconsistent sound perception
Solution Approach 1:
The system dynamically adjusts sound output parameters based on real-time detection of head position. The computer detects head position and automatically modifies sound amplitudes and frequencies to compensate for positional variations, enabling accurate hearing tests regardless of where the occupant is seated in the vehicle
Solution Approach 2:
The system changes sound parameters (amplitudes and frequencies) based on detected head position. By modifying these acoustic parameters in response to position data, the system maintains measurement accuracy across different seating locations and head orientations
2Measurement precision
If sound amplitudes are increased to compensate for head position variations, then sound perception improves, but the risk of damaging hearing worsens
Solution Approach 1:
The system selectively adjusts specific sound parameters (amplitudes and frequencies) based on head position rather than uniformly increasing all sound levels. This targeted parameter modification achieves accurate sound perception while avoiding excessive volume that could damage hearing
Solution Approach 2:
The system uses feedback from head position detection to continuously adjust sound output parameters. This closed-loop approach ensures sound amplitudes are optimized for accurate perception at each position while maintaining safety limits to prevent hearing damage
3Device complexity
If hearing tests are conducted without considering ambient noise levels, then the testing process is simpler, but the reliability of results worsens due to noise interference
Solution Approach 1:
The system performs preliminary detection of ambient noise levels before conducting the hearing test. By assessing the acoustic environment in advance and comparing it against threshold values, the system determines whether conditions are suitable for testing, ensuring reliable results without requiring complex real-time noise compensation during the test
Data Source
AI summary
A system includes a computer including a processor and a memory storing instructions executable by the processor to detect a position of a head of an occupant within a passenger compartment of a vehicle. The instructions include instructions to conduct a hearing test based on the position of the head of the occupant. The instructions include instructions to output sound at least at one of a specified frequency or amplitude, the specified frequency or amplitude selected based on results of the hearing test.