Physics 288/489: THE PHYSICS OF MUSIC   Fall, 2004

Lecture 4 (9/16)

Presence of multiple natural frequencies; resonance and damping of oscillations.  "Standing" waves.  Wavelength and relation between wavelength, frequency, and wave velocity.  Normal modes of oscillation.  Complex waveforms, visualization of waveform with microphone oscilloscope.  Interference and beat-notes. 

Reading: Hall 10.1; 4.5

Demonstrations:

    3B10.10-1   rope waves

    3A60.40   driven oscillator; ball/spring

    3B10.10-2   spring waves

    Sine wave oscillator & oscilloscope

    3C50.u1   Microphone & Sound Forge (spectrum analyzer)

    3D40.20   Singing Rod

    3D40.30   Chladni Plates

Music Played:

    Harmonica

    Violin