PHYS 117

Sound and sound waves  sound waves are longitudinal waves (also called compression or pressure waves)  get vibrations from source of sound (eg. loudspeaker, vocal chords)  individual molecules vibrate back and forth (horizontal motion) about (fixed) equilibrium position  get a travelling wave moving through gas, liquid, or solid (needs a “medium”)  frequency of the wave is determined by the source PHYS117  the wavelength  spe...