BACK
NEXT
SSPL_10317352_preview
10317352
Add to Lightbox Add to Lightbox Buy Image Buy Image

This image is protected by copyright law. Please contact us for advice on our licensing terms, before reproducing it for commercial purposes.


To save a small version of this image for mock-up or research purposes, right click (or control click on Macintosh) and Save Picture As...

Galton's whistle, c 1900.

F Galton devised this whistle in order to investigate the upper limit of audible sound in humans. It is constructed from a brass tube which has an internal diameter of approximately 2 millimetres. The whistle was operated by passing a jet of gas through an orifice into a resonating cavity. By moving a plunger, the size of this cavity could be changed, enabling the pitch of the sound made by the whistle to be altered from the audible up into the ultrasonic range. Galton was able to determine that the normal upper limit of human hearing was about 18kHz.

Image No. 10317352 | This is a Rights Managed image.

Inventory No.: 1996-0277_0002
Source No.: 1996-0277

Credit © Science Museum / Science & Society Picture Library -- All rights reserved.
Search for related items:
To search for related items, choose from the following related keywords. To search multiple keywords, select multiple checkboxes and click Search Selected. To search for a single keyword, click the keyword itself.
Show items that have: