2-Outer Ear - The Temporal Bone - Part of the Skull Temporal

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The Temporal Bone - Part of the Skull
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Temporal Bone:Lateral/Medial Views
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The Temporal Bone houses the “Ear”
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Auditory Structures In Perspective
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The Outer Ear Consists of: The Pinna (Auricle) - cartilaginous, highly variable in appearance, some landmarks. sound collection and direction into canal External Auditory Canal (external auditory meatus) - 2.5 cm tube. sound transmission to middle ear
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Pinna Landmarks Helix Antihelix Concha Tragus Intertragal Notch Antitragus
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External Ear Musculature
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External Ear Cartilage (Viewed from its medial aspect)
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External Auditory Canal lateral portion-cartilage medial portion-osseous lined with epidermal (skin) tissue hairs grow in lateral part cerumen (ear wax) secreted in lateral part. Usually curved.
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Outer Ear Functions 1 Amplification / Filtering -- increases sounds between 1500 and 7000 Hz by 10 to 15 dB -- produced by resonance of Concha -- 5000 Hz E.A.Canal -- 2500 Hz
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2-Outer Ear - The Temporal Bone - Part of the Skull Temporal

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