Tuning Forks
[M | t | ★★]
Selection of mounted tuning forks and rubber hammer.
[In-Depth Description]
Tuning Forks and Baffle
[S | t | —]
Sounding a tuning fork with and without a baffle demonstrates its purpose and effectiveness.
Organ Pipes
[M | t | —]
Selection of single organ pipes, open and close-ended, to blow through.
[In-Depth Description]
Sonometer
[M | t | ★★★]
Frequency vs string length and tension are explored on this string instrument, a.k.a monochord
Harmonics
[M | t | —]
Harmonics are generated on the monochord with the application of appropriate boundary conditions.
Siren Discs
[M | t | —]
Spinning disks, perforated with holes, "sing" when air is blown through the holes.
Bell Plates
[S | t | ★★★]
Pieces of sheet metal ring like a bell when struck with a beater while other similar shapes go "clunk."
Semimusical Blocks of Wood
[M | t+ | ★★]
Drop blocks of wood onto the floor in rapid succession to obtain the notes of a musical scale.
Musical Bottle
[S/M | t | —]
A beer bottle becomes a Helmholtz resonator when air is blown across its mouth.
[In-Depth Description]
Variable Whistles
[S | t | —]
Variable frequency Galton whistle.
Fourier Synthesizer
[L | t+ | —]
Nine harmonics can be used to generated wave forms seen on a oscilloscope.
Fourier Analyzer
[L | t+ | —]
Frequency power spectrum of sounds is measured and displayed.
White/Pink Noise Generator
[M | t+ | —]
A special machine to make...noise.
Contact Us
Mailing Address: Lecture Demonstration Services, Science Center, Rm B-08A, 1 Oxford Street, Cambridge, MA 02138
Campus Location: Science Center B-08A | Tel: (617) 495-5824 | Email: scidemos-at-fas.harvard.edu