Summary of Objectives

• Intuitively understand what the spectrum of a periodic sound is.

• Understand that the spectrum of a sound may change over time.

• Learn that the characteristic timbre of an instrument may be partially described by its harmonic content, as revealed by the spectrum.

• Investigate the change in timbre of a plucked string instrument when the magnitudes of the harmonics are varied.

• Determine how the magnitudes of the harmonics may be altered such that the perceived pitch of the sound increases by an octave.

• Alter the harmonic content of the plucked string so that it sounds like another instrument.