Sound

Sound

1. Definition

   • a form of energy
   • pass from one point to another
   • logitudinal wave
   • produced by vibrating sources
   • wavelength
     • horizontal length of one cycle of a wave
     • determines pitch
   • Period
     • time for 1 complete wave
   • Frequency
     • no. of wavelengths / second
   • Amplitude
     • determines volume

2. sound wave

   • compression
     • air pressure higher than surrounding
   • rarefactions
     • air pressure lower than surrounding
   • transmission
     • require a medium
     • cannot travel through vacuum
     • travel fastest in solid,
     • slowest in gases

3. speed

   • Distance/ time