Sound Waves (9.2).

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Presentation transcript:

Sound Waves (9.2)

See the vibrating string producing sound waves

Sound travels as longitudinal waves

Whale songs in water medium

Sound waves travel in all directions

Sonar in bats for finding food at night (receiving echos)

Sonar for water

Volume “loudness”

Decibels

Pitch “Intensity”

Musical Instruments and pitch

Musical Instruments and pitch

Musical Instruments and pitch

Hearing (bending of hairs)

Coclea (fluid filled…perilymph) canal

Fluid ripple of perilymph bends the hairs in the middle using the tectorial membrane

Auditory nerve & brain to process sound waves into sound