Friction idiophone
Friction idiophones is designation 13 in the Hornbostel-Sachs system of musical instrument classification. These idiophones produce sound by being rubbed either against each other or by means of a non-sounding object. Instruments of this type are not very common; possibly the best known examples are the musical saw and the nail violin.
According to musicologist Curt Sachs:
RUBBED OR FRICTION IDIOPHONES. It is essential to distinguish between rubbing and scraping. The latter results in a series of beats cause by passing a stick over a notched surface; [whereas] friction is based on adhesion....On a higher level we find...the glass harmonica.

Friction sticks (131)
131.1 Individual friction sticks.
131.2 Sets of friction sticks.

Nail violin
Cristal baschet, preceded by the euphon131.21 Without direct friction.
131.22 With direct friction.

Friction plaques (132)
132.1 Individual friction plaques.

Daxophone
Musical saw
Triolin
Turntable132.2 Sets of friction plaques.

Clavicylinder

Friction vessels (133)
133.1 Individual friction vessels.

Rainstick
Singing Bowl
Ekola133.2 Sets of friction vessels.

Glass harmonica
Glass harp
Terpodion/melodion
Verrophone

See also
Wind machine

References
"Idiophone", Music.VT.edu at the Wayback Machine (archived October 17, 2012)
"SVH Classification", Wesleyan.edu.


== Notes ==