3 designed to gather and collect sound into the ear canal Outer Ear = Pinnadesigned to gather and collect sound into the ear canal
4 Middle Ear – the Auditory Canal Channels the sound toward the EAR DRUM
5 Middle Ear – the Ear Drum is actually called the “TYMPANIC MEMBRANE” Sound waves = vibrationsHAMMER hits ANVIL moving the STIRRUP!
6 What Happens Next? Sound waves travel into the SPIRALLED COCHLEA Tiny hairs in the COCHLEA move to the beat, and send impulses along nerve fibresAll nerve fibres link to the AUDITORY NERVE, to the brain.
13 Sound Wave ProductionLevels of IntensitySoft (Low)Harsh(High)
14 Defeating Deafness – Cochlear Implants The implant generates electric signals as the sound bounces off detectorVibrations = electricityElectricity stimulates the AUDITORY NERVE directly
15 Protect your Hearing!Ear plugsEar – muffsKeep the volume down
16 Spidey knows the Value of Protecting Your Hearing!
17 Copy out these notesPinna = outer portion of ear used to collect sound wavesAuditory Canal = tube that sound travels downEar Drum = membrane that sends sound waves to hammerHammer = first of 3 bones. It vibrates, striking the anvil to carry on the soundAnvil = gets hit by the hammer, striking the StirrupStirrup = vibrates against OVAL WINDOW, carrying on soundCochlea = a spiral full of sensory “hairs,” which when bent, send an electrical signal to the AUDITORY NERVEAuditory Nerve = carries all signals for sound to brainSemiCircular Canals = full of gel-like material. Indicates if you are right side up or upside down. (Balance)