Sound waves main

• how do we hear?

  outer ear collects the sound and channels it down the ear canal - travels down as a pressure air wave - wave hits eardrum - tightly stretched membrane vibrates as the waves reach it
• compression and refraction on the eardrum

  compression forces the eardrum inward

  refraction forces the eardrum outwards
• what type of waves are soundwaves

  longitudinal
• what can soundwaves pass through

  solid, liquid, and gases
• what does the speed of sound depend on

  the medium through which theyre travelling
• what is the speed of sound through air

  330m/s
• why can sound not travel through a vaccum

  there are no particles to carry the vibrations
• properties of sound


  higher the frequency = higher the pitch

  higher the amplitude = louder