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A carillonneur plays the 56-bell carillon of the Plummer Building, Rochester, Minnesota, US The 56-bell carillon of Saint Joseph's Oratory, Montreal, Quebec, Canada [1]. A carillon (US: / ˈ k ær ə l ɒ n / KARR-ə-lon, UK: / k ə ˈ r ɪ l j ən / kə-RIL-yən [2] [3]) is a pitched percussion instrument that is played with a keyboard and consists of at least 23 bells.
A whistle is a quarter-wave generator, which means that a sound wave generated by a whistle is about four times the whistle length. If the speed of sound in the steam supplied to a whistle were 15936 inches per second, a pipe with a 15-inch effective length blowing its natural frequency would sound near middle C: 15936/(4 x
Leslie S-5T train horn being fitted to a restored ex-Seaboard System EMD GP30 diesel locomotive at the 2006 Oak Ridge Horn Honk and Collectors Meet Train horns are made of multiple horn units called chimes which produce different notes; sounded together they make a chord. The Nathan model M5 pictured is a 5 chime horn.
Below is a comparison between the first 31 harmonics and the intervals of 12-tone equal temperament (12TET), octave displaced and compressed into the span of one octave. Tinted fields highlight differences greater than 5 cents ( 1 ⁄ 20 of a semitone), which is the human ear's " just noticeable difference " for notes played one after the other ...
The base-10 logarithm of 2 is equal to approximately 0.301, which Sauveur multiplies by 1000 to obtain 301 units in the octave. In order to work on more manageable units, he suggests to take 7/301 to obtain units of 1/43 octave. [b] The octave therefore is divided in 43 parts, named "merides", themselves divided in 7 parts, the "heptamerides ...
A frequency ratio expressed in octaves is the base-2 logarithm (binary logarithm) of the ratio: = An amplifier or filter may be stated to have a frequency response of ±6 dB per octave over a particular frequency range, which signifies that the power gain changes by ±6 decibels (a factor of 4 in power), when the frequency changes by a factor of 2.
Portable electronic keyboards became a regular feature of rock-and-roll music during the 1960s. They are also more convenient to move and store than are the large one-piece organs that had previously defined the market. By the late 1960s, the home organ market was dying while the portable keyboard market was thriving.
Most Hammond organs have two 61-note (five-octave) keyboards called manuals. As with pipe organ keyboards, the two manuals are positioned on two levels close to each other. Each is laid out in a similar manner to a piano keyboard, except that pressing a key on a Hammond results in the sound continuously playing until it is released, whereas ...
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