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A micro perforated plate (MPP) is a device used to absorb sound, reducing its intensity. It consists of a thin flat plate, made from one of several different materials, with small holes punched in it. An MPP offers an alternative to traditional sound absorbers made from porous materials.
A softer mallet, which has a thicker felt covering, can achieve a greater sounding of the fundamental pitch of the plate, while a harder mallet with a thinner covering of felt will produce stronger overtones and possibly overshadow the fundamental pitch of the plate. The sound can also be manipulated by striking different areas of the plate.
A verrophone ("glass-euphonium") is a musical instrument, invented in 1983 by Sascha Reckert, [1] which, "uses tuned glass tubes," [2] open at one end and arranged in various sizes (usually in a chromatic scale, arranged from large to small, like the pipes of a pipe organ).
The following is a list of unidentified, or formerly unidentified, sounds. All of the sound files in this article have been sped up by at least a factor of 16 to increase intelligibility by condensing them and raising the frequency from infrasound to a more audible and reproducible range.
They have also been made of glass, but although bells of this type produced a successful tone, this substance being very brittle was unable to withstand the continued use of the clapper. [ 18 ] By popular tradition the bell metal contained gold and silver , as component parts of the alloy, as it is recorded that rich and devout people threw ...
A crystallophone is a musical instrument that produces sound from glass. One of the best known crystallophones is the glass harmonica, a set of rotating glass bowls which produce eerie, clear tones when rubbed with a wet finger. Musical glasses, the glass harp, were documented in Persia in the 14th century. [1]
The glockenspiel is played with unwrapped mallets made of hard material, such as metal (usually brass or aluminum) or a type of polymer (usually Lexan, acrylic, phenolic, or nylon). Non-metal mallets are used for general playing, while metal mallets produce a more brilliant sound.
In December 1877, [5] Thomas Edison and his team invented the phonograph using a thin sheet of tin foil wrapped around a hand-cranked, grooved metal cylinder. [6] Tin foil was not a practical recording medium for either commercial or artistic purposes, and the crude hand-cranked phonograph was only marketed as a novelty, to little or no profit.