Hearing

• Hearing: process of detecting audible variations in air pressure
• Frequency: measuring sound, pitch

  • Cycles per sec, hertz
• Amplitude: measure in decibels, loudness
• Mechanosensation: process of hearing
• Attenuation reflex: muscles between bones

  • quiet own voice
  • quiet loud noises
  • cocktail party effect
• pinna: funnel sound waves
• 3 tiny bones in ear: hammer, anvil, stirrup
• cochlea: inner ear
• basilar membrane: floats in middle of fluid
• tip links: connect cilia to next
• BM moves: cilia moves, tip links break, ion channels open