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Playing some wind instruments, in particular those involving high breath pressure resistance, produce increases in intraocular pressure, which has been linked to glaucoma as a potential health risk. One 2011 study focused on brass and woodwind instruments observed "temporary and sometimes dramatic elevations and fluctuations in IOP". [ 12 ]
The instruments were mainly treble cornetts, [26] tuned to the same range as the curved treble cornett, G 3 to A 5. [27] The others found in museums are soprano cornetts, also tuned like curved instruments to E 4 to E 6. [27] [26] This instrument's name tells something of its tonal nature.
The first class (41) includes instruments which, when played, do not contain the vibrating air. The bullroarer is one example. These are called free aerophones. This class includes (412.13) free reed instruments, such as the harmonica, but also many instruments unlikely to be called wind instruments at all by most people, such as sirens and whips.
412.13 Free-reed instruments feature a reed which vibrates within a closely fitting slot (there may be an attached pipe, but it should only vibrate in sympathy with the reed, and not have an effect on the pitch - instruments of this class can be distinguished from 422.3 by the lack of finger-holes). 412.131 Individual free reeds. Bawu; Party horn
The recorder was one of the most important wind instruments of the Renaissance, and many instruments dating to the sixteenth century survive, including some matched consorts. [ 20 ] [ 21 ] This period also produced the first extant books describing the recorder, including the treatises of Virdung (1511), Agricola (1529), Ganassi (1535), Cardano ...
The criteria for classifying musical instruments vary depending on the point of view, time, and place. The many various approaches examine aspects such as the physical properties of the instrument (shape, construction, material composition, physical state, etc.), the manner in which the instrument is played (plucked, bowed, etc.), the means by which the instrument produces sound, the quality ...
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free reed instruments: reed organ/recorder Pipe organ Flue pipes: aerophones: 421.221.11: fipple flutes: recorder Pipe organ (free reed pipes) aerophones: 412.132: free reed instruments: reed organ Pipe organ (reed pipes) aerophones: 422.112: reed instruments: organ Pitch pipe: aerophones: 412.131: free reed instruments: pitch pipe Pocket ...