» Stern Tone Changer (300 - 600 Hertz) (0357)
Immagini
DESCRIPTION
Exhibit 357 is a tone changer invented in 1897 by the German psychologist William Stern to study the human sensitivity to changes in sonic frequency. The instrument consists of a resonator in the form of a brass cylinder of variable volume subject to a constant flow of air through an opening in the top. The screw on the front moves in a known graduated manner the piston which varies the volume and thus the resonant frequency.
In the museum collection, there are other Stern tone changers:
ISCRIZIONI
- Inciso sul cilindro di ottone: "Max Kohl A.G. Chemnitz"
Dati Catalografici
| Data di costruzione: | --- |
|---|---|
| Data di carico: | 1923-11-22 |
| Nr. Inventario: | 4077 (Generale dal 1874) |
| Costruttore: | Max Kohl A.G. |
| Materiale: | ottone, metallo, ghisa, verniciato |
| Dimensioni: | Base: 13 cm x 13 cm; Altezza: 34 cm; La parte alta sporge dalla base di circa 2 cm |
| Conservazione: | buono |