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  2. List of musical symbols - Wikipedia

    en.wikipedia.org/wiki/List_of_musical_symbols

    Musical symbols are marks and symbols in musical notation that indicate various aspects of how a piece of music is to be performed. There are symbols to communicate information about many musical elements, including pitch, duration, dynamics, or articulation of musical notes; tempo, metre, form (e.g., whether sections are repeated), and details about specific playing techniques (e.g., which ...

  3. Glossary of music terminology - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_music_terminology

    The term Grand ballabile is used if nearly all participants (including principal characters) of a particular scene in a full-length work perform a large-scale dance. bar, or measure unit of music containing a number of beats as indicated by a time signature; also the vertical bar enclosing it barbaro

  4. Ionosphere - Wikipedia

    en.wikipedia.org/wiki/Ionosphere

    Relationship of the atmosphere and ionosphere. The ionosphere (/ aɪ ˈ ɒ n ə ˌ s f ɪər /) [1] [2] is the ionized part of the upper atmosphere of Earth, from about 48 km (30 mi) to 965 km (600 mi) above sea level, [3] a region that includes the thermosphere and parts of the mesosphere and exosphere. The ionosphere is ionized by solar ...

  5. Maximum usable frequency - Wikipedia

    en.wikipedia.org/wiki/Maximum_usable_frequency

    In this way radio waves can travel beyond the horizon, around the curve of the Earth. However the refractive index of the ionosphere decreases with increasing frequency, so there is an upper limit to the frequency which can be used. Above this frequency the radio waves are not reflected by the ionosphere but are transmitted through it into space.

  6. List of Italian musical terms used in English - Wikipedia

    en.wikipedia.org/wiki/List_of_Italian_musical...

    Italian term Literal translation Definition Banda: band: Small music ensemble used as a supplement to the orchestra in an opera Comprimario: with the first: Supporting role Concertino: little concert: Smaller, more virtuosic group of musicians in a concerto grosso: Convenienze: conveniences

  7. Glossary of jazz and popular music - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_jazz_and...

    This glossary includes terms for musical instruments, playing or singing techniques, amplifiers, effects units, sound reinforcement equipment, and recording gear and techniques which are widely used in jazz and popular music. Most of the terms are in English, but in some cases, terms from other languages are encountered (e.g. to do an "encore ...

  8. Ionospheric absorption - Wikipedia

    en.wikipedia.org/wiki/Ionospheric_absorption

    Ionosphere absorption is of critical importance when radio networks, telecommunication systems or interlinked radio systems are being planned, particularly when trying to determine propagation conditions. [1] The ionosphere can be described as an area of the atmosphere in which radio waves on shortwave bands are

  9. Elements of music - Wikipedia

    en.wikipedia.org/wiki/Elements_of_music

    Some definitions refer to music as a score, or a composition: [18] [7] [19] music can be read as well as heard, and a piece of music written but never played is a piece of music notwithstanding. According to Edward E. Gordon the process of reading music , at least for trained musicians, involves a process, called "inner hearing" or "audiation ...