Interference Apparatus

Koenig Acoustical · Physics

Accession Number:


An input tube is connected to the brass resonator located next to a sound source, a tuning fork; tubes branch off in two “;U”; shaped branches, supported by stand with scale in mm; a draw tube at the top of one of the tubes lengthens and shortens the tube like a trombone; each tube feeds directly into a manometric capsule, held in a block of wood; each capsule has a corresponding gas burner; two other outputs from each capsule, join in a third gas burner.’, ‘This apparatus demonstrated the principles of interference of sound. For example, if tubes were adjusted so that they were out of phase by exactly half a wave length, the corresponding flame from the joined gas burner would show total interference with no flame signal. This apparatus could also be used to calculate the velocity of sound with air or other gases.

Primary Materials:

Steel, Wood, Brass, Cast Iron, Wood Rubber.

Dimensions (cm):

Height = 82, Length = 50, Width = 32 .

Condition: Very good.

Manufacturer: Rudolph Koenig à Paris

Additional Information and References:

Rudolph Koenig (1889) Catalogue des Appareils Acoustique<.i>, p. 87-88, No. 243.

J. A. Zahm (1900). Sound and Music. pp. 296-9.

Thomas B. Greenslade, Jr. (1992). “The Acoustical Apparatus of Rudolph Koenig.” The Physics Teacher, vol. 30, pp. 518 – 524.