[Virginia Tech Department of Physics]

Lecture Demonstrations

Waves & Sound
   

W03: A Harmonic Chord

 

Purpose: To produce a harmonic chord. The chord is three tones that interfere with each other in such a way as to be musically harmonic.

Description: Please specify which option you want.

 

Option 1: Three tuning forks on resonator boxes (C=256 Hz, E=320 Hz, G=384 Hz).

Option 2: Four tuning forks next to cylinderical resonators (C=256 Hz, E=320 Hz, G=384 Hz, C'=512 Hz)

Strike the tuning forks with the rubber mallet. As each new tone is added a harmonic chord develops. The three tones sound good together because the beat frequencies of the three tones are all multiples of 64 Hz. All the tones are multiples of 64 Hz.

This and other harmonic and anharmonic chords can also be produced using the Pasco WavePort software that is available on the lecture computer (see W04).

 

 

Equipment List: Storage Location: Hahn N 130A

 

Tuning fork harmonic cord set B2.1

References:

Manual: None

  Setup Notes: W03 PIRA #:
Manufacturer(s): Other school's Demonstration web pages

A/V

E&M

[HOME] Virginia Tech Physics

[PREV] Lecture Demo List