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  2. RIAA equalization - Wikipedia

    en.wikipedia.org/wiki/RIAA_equalization

    RIAA equalization is a form of pre-emphasis on recording and de-emphasis on playback. A recording is made with the low frequencies reduced and the high frequencies boosted, and on playback, the opposite occurs. The net result is a flat frequency response, but with attenuation of high-frequency noise such as hiss and clicks that arise from the ...

  3. Phonograph - Wikipedia

    en.wikipedia.org/wiki/Phonograph

    Phonograph. Illustration of a typical modern turntable: here showing the curved tonearm with a headshell at the end, under which lies the magnetic cartridge and its attached stylus touching down on the grooves of a black record placed on the turntable's platter. A phonograph, later called a gramophone (as a trademark since 1887, as a generic ...

  4. Victor Orthophonic Victrola - Wikipedia

    en.wikipedia.org/wiki/Victor_Orthophonic_Victrola

    The Victor Orthophonic Victrola, first demonstrated publicly in 1925, was the first consumer phonograph designed specifically to play electrically recorded phonograph records. The combination was recognized as a major step forward in sound reproduction. Electrical recording was developed by Western Electric, although a primitive electrical ...

  5. Microsoft Excel - Wikipedia

    en.wikipedia.org/wiki/Microsoft_Excel

    Microsoft Excel is a spreadsheet editor developed by Microsoft for Windows, macOS, Android, iOS and iPadOS. It features calculation or computation capabilities, graphing tools, pivot tables, and a macro programming language called Visual Basic for Applications (VBA). Excel forms part of the Microsoft 365 suite of software.

  6. History of sound recording - Wikipedia

    en.wikipedia.org/wiki/History_of_sound_recording

    The crude tinfoil phonograph proved to be of little use except as a novelty. It was not until the late 1880s that an improved and much more useful form of the phonograph was marketed. The new machines recorded on easily removable hollow wax cylinders and the groove was engraved into the surface rather than indented. The targeted use was ...

  7. Phonograph record - Wikipedia

    en.wikipedia.org/wiki/Phonograph_record

    A phonograph record (also known as a gramophone record, especially in British English) or a vinyl record (for later varieties only) is an analog sound storage medium in the form of a flat disc with an inscribed, modulated spiral groove. The groove usually starts near the outside edge and ends near the center of the disc.

  8. Diaphragm (acoustics) - Wikipedia

    en.wikipedia.org/wiki/Diaphragm_(acoustics)

    In the field of acoustics, a diaphragm is a transducer intended to inter-convert mechanical vibrations to sounds, or vice versa. It is commonly constructed of a thin membrane or sheet of various materials, suspended at its edges. The varying air pressure of sound waves imparts mechanical vibrations to the diaphragm which can then be converted ...

  9. Sound recording and reproduction - Wikipedia

    en.wikipedia.org/wiki/Sound_recording_and...

    Sound recording and reproduction is the electrical, mechanical, electronic, or digital inscription and re-creation of sound waves, such as spoken voice, singing, instrumental music, or sound effects. The two main classes of sound recording technology are analog recording and digital recording. Acoustic analog recording is achieved by a ...