Indirectly struck idiophones
Indirectly stuck idiophones is one of the categories of musical instruments found in the Hornbostel-Sachs system of musical instrument classification. The idiophones found in this category produce sound resulting from an indirect action of the performer as opposed to the directly struck idiophones. The player himself does not go through the movement of striking; percussion results indirectly through some other movement by the player. This category is divided in two main sub-categories: shaken idiophones and scraped idiophones.
Shaken idiophones or rattles (112.1)
The player makes a shaking motion
112.11 Suspension ratlles - Perforated idiophones are mounted together, and shaken to strike against each other.
112.111 Strung rattles - Rattling objects are strung in rows on a cord.
112.112 Stick rattles - Rattling objects are strung on a bar or ring.
112.12 Frame rattles - Rattling objects are attached to a carrier against which they strike.
112.121 Pendant rattles.
112.122 Sliding rattles.
112.13 Vessel rattles - Rattling objects enclosed in a vessel strike against each other or against the walls of the vessel, or usually against both.
Scraped idiophones (112.2)
The player causes a scraping movement directly or indirectly; a non-sonorous object moves along the notched surface of a sonorous object, to be alternately lifted off the teeth and flicked against them; or an elastic sonorous object moves along the surface of a notched non-sonorous object to cause a series of impacts. This group must not be confused with that of friction idiophones.
112.21 Scraped sticks.
112.211 Scraped sticks without resonator.
112.212 Scraped sticks with resonator.
112.22 Scraped tubes.
112.23 Scraped vessels.
112.24 Scraped wheels - cog rattles or Ratchet
112.3 Split idiophones - Instruments in the shape of two springy arms connected at one end and touching at the other: the arms are forced apart by a little stick, to jungle or vibrate on recoil.
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