CAAB AME B1.2 Practice Questions - CAAB AME Licence Category B1.2 (Aeroplane Piston) Exam

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In the context of noise-induced hearing loss (NIHL) in aviation maintenance, what frequency range is typically affected first?

Low frequencies between 100 Hz and 500 Hz, which correspond to reciprocating engine intake noise. Mid frequencies between 1,000 Hz and 2,000 Hz, where human speech is most prominent. High frequencies around 4,000 Hz, showing a characteristic 'noise notch' on an audiogram. Ultra-high frequencies above 15,000 Hz, which are felt as vibration rather than heard.

Correct Answer:

High frequencies around 4,000 Hz, showing a characteristic 'noise notch' on an audiogram.

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