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Electromagnetic reequires no medium like light or x rays
Sound waves when objects vibrates = longtudial waves
Properties of a sound waves
Speed how fast sound moves
Loudness how intens it is
Pitch is frequency of a sound wave
Sound wave travel faster though more dense mediums
Gass 769mph/ liquids 1400mps/ solides 5000mph
Loudess is how intense the sound is
Intensity is how much energy
Amplitude height is loudess
Loudness meassurs decibles 0 db can barely be heard 100 causes hearing loss
Whiper 15-20/ jet 120-160
Pitch high or low sound is
Frequency determies pitch
Wave length of a sound wave shows frequency
Music and noise are different depending on shape of sound wave
Noise- no clear patteren
Music a clear patteren
Sound and Hearing
Ears are sense organs that respond to sound
Your ear convers sound waves into eletrical signals
The ears structure is designed to receive and transmit the sound waves
Ear has 3 sectons
Outer ear- Pinna, ear canal and ear drum
Middle ear has 3 bones - hammer,anvil and stirrup
Inner ear- cochlea and auditory nerve
Pinna- shaped to gather and focus sound into the ear
Ear canal-hollow tube that carries waves to eardrum
Sound waves hit the eardrumcausing it to vibrate
Eardrum-transmitts vibration to inner ear
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