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.

Glass harmonica; sound produced by friction of the fingers against the rotating glass
Glass harp; sound produced by friction of the fingers rotating against the wine glass rims

Friction sticks (131)
Main article: List of idiophones by Hornbostel–Sachs number

131.1 Individual friction sticks.

131.2 Sets of friction sticks.

131.21 Without direct friction.

131.22 With direct friction.

Friction plaques (132)

132.1 Individual friction plaques.

132.2 Sets of friction plaques.

Friction vessels (133)

133.1 Individual friction vessels.

133.2 Sets of friction vessels.

gollark: The names don't correspond to actual dimensions now, though.
gollark: Although progress on that is slowing down.
gollark: Maybe it'll be practical *eventually*. We've got a-few-nanometres-or-so-accuracy fabrication for silicon stuff.
gollark: It's probably one of those things which could be very nice if you could actually make it at all somehow.
gollark: Fair. Maybe there's a gap in the market for better online teaching of this stuff, somehow.

See also

References
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