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Interference Beat
In acoustics, a beat is an Interference (wave propagation), interference pattern between two sounds of slightly different frequency, frequencies, ''perceived'' as a periodic variation in amplitude (music), volume whose rate is the Difference (mathematics), difference of the two frequencies. With Musical tuning, tuning instruments that can produce sustained tones, beats can be readily recognized. Tuning two tones to a unison will present a peculiar effect: when the two tones are close in pitch but not identical, the difference in frequency generates the beating. The volume varies like in a tremolo as the sounds alternately interfere constructively and destructively. As the two tones gradually approach unison, the beating slows down and may become so slow as to be imperceptible. As the two tones get further apart, their beat frequency starts to approach the range of human pitch perception, the beating starts to sound like a note, and a combination tone is produced. This combination t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Beating Frequency
Beat, beats or beating may refer to: Common uses * Patrol, or beat, a group of personnel assigned to monitor a specific area ** Beat (police), the territory that a police officer patrols ** Gay beat, an area frequented by gay men * Battery (crime), a criminal offense involving unlawful physical contact * Assault, inflicting physical harm or unwanted physical contact * Corporal punishment, punishment intended to cause physical pain * Strike (attack), repeatedly and violently striking a person or object * Victory, success achieved in personal combat, military operations or in any competition People * Beat (name), a German male given name * Jackie Beat, drag persona of Kent Fuher (born 1963) * Aone Beats (born 1984) Nigerian record producer * Billy Beats (1871-1936) British footballer * Cohen Beats (Michael Cohen, born 1986), Israeli record producer * Eno Beats (Enock Kisakye, born 1991), Ugandan record producer * Laxio Beats (Bernard Antwi-Darko, born 1987), Ghanaian r ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Trigonometric Identities
In trigonometry, trigonometric identities are equalities that involve trigonometric functions and are true for every value of the occurring variables for which both sides of the equality are defined. Geometrically, these are identities involving certain functions of one or more angles. They are distinct from triangle identities, which are identities potentially involving angles but also involving side lengths or other lengths of a triangle. These identities are useful whenever expressions involving trigonometric functions need to be simplified. An important application is the integration of non-trigonometric functions: a common technique involves first using the substitution rule with a trigonometric function, and then simplifying the resulting integral with a trigonometric identity. Pythagorean identities The basic relationship between the sine and cosine is given by the Pythagorean identity: :\sin^2\theta + \cos^2\theta = 1, where \sin^2 \theta means (\sin \theta)^2 a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
