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SMHow Do We Hear? | Hearing Mechanism 🔉👂🏻
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Hearing is a complex process that involves several anatomical structures and mechanisms. Here’s a brief overview of how we hear:
1. Sound Wave Collection
Outer Ear: Sound waves enter through the pinna (the visible part of the ear) and travel through the ear canal to the eardrum.
2. Vibration Transmission
Eardrum: When sound waves hit the eardrum, it vibrates.
Middle Ear: These vibrations are transmitted to three tiny bones known as the ossicles (malleus, incus, and stapes). The ossicles amplify the sound vibrations.
3. Sound Wave Conversion
Inner Ear: The stapes connects to the cochlea, a fluid-filled structure. The vibrations create waves in the cochlear fluid, causing the hair cells within the cochlea to move.
4. Signal Transmission
Hair Cells: Movement of hair cells generates electrical signals. These signals are converted into nerve impulses.
5. Brain Interpretation
Auditory Nerve: The nerve impulses travel through the auditory nerve to the brain.
Brain Processing: The brain interprets these signals as sounds, allowing us to perceive and understand them.
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