External ear functions

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Presentation transcript:

External ear functions Modifies the spectrum of incoming sounds. Resonance of external auditory meatus Head related transfer functions Protection to middle and inner ear structures

Resonance of ear canal Resonance of ear canal: Around 2.5 kHz Resonance of the concha: Around 5 kHz Net effect: Boost in frequency region between 1.7 and 7 kHz

External ear functions Modifies the spectrum of incoming sounds. Resonance of external auditory meatus Head related transfer functions Protection to middle and inner ear structures

Head-related transfer functions Inter-aural amplitude/level difference Inter-aural time difference Important for sound localization