P6 - Waves

P6 - Waves

1. Longitudinal

   • Sound waves are produced by all vibrating objects. Loudspeakers work by converting electrical energy into kinetic energy. This moves the cone which creates the sound waves.
   • The slideshow shows how you can model longitudinal waves using a long spring:

2. Transvers

   • The waves move across the direction of travel
     • like lights waves or water waves

3. pitch

   • frequency
     • Wavelength
       • the distence between two identical points on a wave E.G two peaks
         • The units of wavelengths are meaters
     • How many waves go past in one second
       • the units of frequency are Hertz
   • Volume
     • How loud the sound is
     • microphne
       • Takes sound waves and turns them into eletrical signals
       • speaker
         • Takes eletrical signals and turns them into a sound wave
   • How high or low the sound is

4. The ear

   • pinna
     • ear canal
       • ear drum
         • ossicles
           • cachlea
             • Tiny hairs move and canvert the sound waves in to an electricl signal
             • Auditory Nerve
               • Brain
           • hammer,anvil,strrup

5. The speed of sound

   • Sound travels faster in solids
   • in water sound travels at 1500m/s
   • In air sound travels at 330m/s
   • sound does not travel in a vacunm

6. humans cant hear over 20000Hz and below 20Hz

   • dogs cant hear over 40000Hz or below 40Hz
     • bats cant hear over 120000Hr and below 120Hz
       • bottlenose dolphin cant hear over 14000Hz or below 140Hz