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Wolf Tone Eliminator
A wolf tone, or simply a "wolf", is an undesirable phenomenon that occurs in some bowed-string instruments, most famously in the cello. It happens when the pitch of the played note is close to a particularly strong natural resonant frequency of the body of the musical instrument. A wolf tone is hard for the player to control: instead of a solid tone it tends to produce a thin “surface” sound, sometimes jumping to the octave of the intended note. In extreme cases, a “stuttering” or “warbling” sound is produced, as in the sound example. This sound may be likened to the howling of a wolf. A somewhat similar sound is the beating produced by a wolf interval, which is usually the interval between E and G of the various non-circulating temperaments. Stringed instruments The physics behind the warbling wolf was first explained by C. V. Raman. He used simultaneous measurements of the vibrating string and the vibrating body of the cello, to show that the warbling sound is ca ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Resonant Frequency
Resonance describes the phenomenon of increased amplitude that occurs when the frequency of an applied periodic force (or a Fourier component of it) is equal or close to a natural frequency of the system on which it acts. When an oscillating force is applied at a resonant frequency of a dynamic system, the system will oscillate at a higher amplitude than when the same force is applied at other, non-resonant frequencies. Frequencies at which the response amplitude is a relative maximum are also known as resonant frequencies or resonance frequencies of the system. Small periodic forces that are near a resonant frequency of the system have the ability to produce large amplitude oscillations in the system due to the storage of vibrational energy. Resonance phenomena occur with all types of vibrations or waves: there is mechanical resonance, orbital resonance, acoustic resonance, electromagnetic resonance, nuclear magnetic resonance (NMR), electron spin resonance (ESR) and reson ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tuned Mass Damper
A tuned mass damper (TMD), also known as a harmonic absorber or seismic damper, is a device mounted in structures to reduce mechanical vibrations, consisting of a mass mounted on one or more damped springs. Its oscillation frequency is tuned to be similar to the resonant frequency of the object it is mounted to, and reduces the object's maximum amplitude while weighing much less than it. TMDs can prevent discomfort, damage, or outright structural failure. They are frequently used in power transmission, automobiles and buildings. Principle Tuned mass dampers stabilize against violent motion caused by harmonic vibration. They use a comparatively lightweight component to reduce the vibration of a system so that its worst-case vibrations are less intense. Roughly speaking, practical systems are tuned to either move the main mode away from a troubling excitation frequency, or to add damping to a resonance that is difficult or expensive to damp directly. An example of the lat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sounds By Type
In physics, sound is a vibration that propagates as an acoustic wave, through a transmission medium such as a gas, liquid or solid. In human physiology and psychology, sound is the ''reception'' of such waves and their ''perception'' by the brain. Only acoustic waves that have frequencies lying between about 20 Hz and 20 kHz, the audio frequency range, elicit an auditory percept in humans. In air at atmospheric pressure, these represent sound waves with wavelengths of to . Sound waves above 20 kHz are known as ultrasound and are not audible to humans. Sound waves below 20 Hz are known as infrasound. Different animal species have varying hearing ranges. Acoustics Acoustics is the interdisciplinary science that deals with the study of mechanical waves in gasses, liquids, and solids including vibration, sound, ultrasound, and infrasound. A scientist who works in the field of acoustics is an ''acoustician'', while someone working in the field of acoustic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Violin Acoustics
Violin acoustics is an area of study within musical acoustics concerned with how the sound of a violin is created as the result of interactions between its many parts. These acoustic qualities are similar to those of other members of the violin family, such as the viola. The energy of a vibrating string is transmitted through the bridge to the body of the violin, which allows the sound to radiate into the surrounding air. Both ends of a violin string are effectively stationary, allowing for the creation of standing waves. A range of simultaneously produced harmonics each affect the timbre, but only the fundamental frequency is heard. The frequency of a note can be raised by the increasing the string's tension, or decreasing its length or mass. The number of harmonics present in the tone can be reduced, for instance by the using the left hand to shorten the string length. The loudness and timbre of each of the strings is not the same, and the material used affects sound quality ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
String Resonance
Sympathetic resonance or sympathetic vibration is a harmonic phenomenon wherein a passive string or vibratory body responds to external vibrations to which it has a harmonic likeness. The classic example is demonstrated with two similarly-tuned tuning forks. When one fork is struck and held near the other, vibrations are induced in the unstruck fork, even though there is no physical contact between them. In similar fashion, strings will respond to the vibrations of a tuning fork when sufficient harmonic relations exist between them. The effect is most noticeable when the two bodies are tuned in unison or an octave apart (corresponding to the first and second harmonics, integer multiples of the inducing frequency), as there is the greatest similarity in vibrational frequency. Sympathetic resonance is an example of injection locking occurring between coupled oscillators, in this case coupled through vibrating air. In musical instruments, sympathetic resonance can produce both desir ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mechanical Resonance
Mechanical resonance is the tendency of a mechanical system to respond at greater amplitude when the frequency of its oscillations matches the system's natural frequency of vibration (its ''resonance frequency'' or ''resonant frequency'') closer than it does other frequencies. It may cause violent swaying motions and potentially catastrophic failure in improperly constructed structures including bridges, buildings and airplanes. This is a phenomenon known as resonance disaster. Avoiding resonance disasters is a major concern in every building, tower and bridge construction project. The Taipei 101 building relies on a 660-ton pendulum—a tuned mass damper—to modify the response at resonance. Furthermore, the structure is designed to resonate at a frequency which does not typically occur. Buildings in seismic zones are often constructed to take into account the oscillating frequencies of expected ground motion. In addition, engineers designing objects having engines must ensure ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Charles Curtis (musician)
Charles Curtis is a performer and composer of a wide variety of music, with particular emphasis on the avant-garde. Curtis is most strongly associated with minimalism, modern classical, and so-called "downtown music." A graduate of Juilliard School, Curtis has since been involved with the music department at Princeton University and at the University of California, San Diego. He has served as Professor of Contemporary Music Performance at UCSD since 2000, where he serves as artistic director for the chamber music series ''Camera Lucida''. Curtis has studied under such masters as vocalist Pandit Pran Nath and composer La Monte Young and still regularly records and performs. He has also worked closely with composers such as Eliane Radigue Eliane can refer to: Éliane * Éliane a French feminine given name ** Éliane, the name for Hill A1 in the 1954 battle of Dien Bien Phu taken by Colonel General Nguyễn Hữu An * Pierre Éliane (1955), French singer and Carmelite friar Elian ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Éliane Radigue
Éliane Radigue (born January 24, 1932) is a French electronic music composer. She began working in the 1950s and her first compositions were presented in the late 1960s. Until 2000 her work was almost exclusively created with the ARP 2500 modular synthesizer and tape. Since 2001 she has composed mainly for acoustic instruments. Biography Radigue was born in a modest family of merchants and raised in Paris at Les Halles. She later married the French-born American artist Arman with whom she lived in Nice while raising their three children, before returning to Paris in 1967. She had studied piano and was already composing before hearing a broadcast by the founder of musique concrète Pierre Schaeffer. She soon met him, and in the early '50s became his student, working periodically at the Studio d'Essai during visits to Paris. In the early 1960s, she was assistant to Pierre Henry, creating some of the sounds which appeared in his works. As her own work matured, Schaeffer an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Seymour Barab
Seymour Barab (January 9, 1921 – June 28, 2014) was an American composer of opera, songs and instrumental and chamber music, as well as a cellist, organist and pianist. He was best known for his fairy tale operas for young audiences, such as ''Chanticleer'' and ''Little Red Riding Hood''. He was a longtime member of the Philip Glass Ensemble. Early life Barab was born in Chicago, Illinois, to Samuel Barab and Leah Yablunky. Both of Barab's parents were Polish immigrants, who emigrated separately and met in the United States. His older brother, Abraham (b. 1913), later changed his name to Oscar. Barab's father also changed his name in later years to Leo. The family had little money, but Barab's parents considered culture important, and he was given piano lessons, from an early age, at first with his aunt, Gertrude Yablunky. When Barab was thirteen, he started his first musical job as an organist for a church of spiritual healing that his aunt attended. Barab began to study t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lou Harrison
Lou Silver Harrison (May 14, 1917 – February 2, 2003) was an American composer, music critic, music theorist, painter, and creator of unique musical instruments. Harrison initially wrote in a dissonant, ultramodernist style similar to his former teacher and contemporary, Henry Cowell, but later moved toward incorporating elements of non-Western cultures into his work. Notable examples include a number of pieces written for Javanese style gamelan instruments, inspired after studying with noted gamelan musician Kanjeng Notoprojo in Indonesia. Harrison would create his own musical ensembles and instruments with his partner, William Colvig, who are now both considered founders of the American gamelan movement and world music; along with composers Harry Partch and Claude Vivier, and ethnomusicologist Colin McPhee. The majority of Harrison's works and custom instruments are written for just intonation rather than the more widespread equal temperament, making him one of the most p ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bridge (instrument)
A bridge is a device that supports the strings on a stringed musical instrument and transmits the vibration of those strings to another structural component of the instrument—typically a soundboard, such as the top of a guitar or violin—which transfers the sound to the surrounding air. Depending on the instrument, the bridge may be made of carved wood (violin family instruments, acoustic guitars and some jazz guitars), metal (electric guitars such as the Fender Telecaster) or other materials. The bridge supports the strings and holds them over the body of the instrument under tension. Explanation Most stringed instruments produce sound through the application of energy to the strings, which sets them into vibratory motion, creating musical sounds. The strings alone, however, produce only a faint sound because they displace only a small volume of air as they vibrate. Consequently, the sound of the strings alone requires impedance matching to the surrounding air by transmi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Musical Instrument
A musical instrument is a device created or adapted to make musical sounds. In principle, any object that produces sound can be considered a musical instrument—it is through purpose that the object becomes a musical instrument. A person who plays a musical instrument is known as an instrumentalist. The history of musical instruments dates to the beginnings of human culture. Early musical instruments may have been used for rituals, such as a horn to signal success on the hunt, or a drum in a religious ceremony. Cultures eventually developed composition and performance of melodies for entertainment. Musical instruments evolved in step with changing applications and technologies. The date and origin of the first device considered a musical instrument is disputed. The oldest object that some scholars refer to as a musical instrument, a simple flute, dates back as far as 50,000 - 60,000 years. Some consensus dates early flutes to about 40,000 years ago. However, most historians be ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
