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  2. Sound hole - Wikipedia

    en.wikipedia.org/wiki/Sound_hole

    The sound holes of cellos and other instruments of the violin family are known as F-holes and are located on opposing sides of the bridge. A sound hole is an opening in the body of a stringed musical instrument, usually the upper sound board. Sound holes have different shapes: Round in flat-top guitars and traditional bowl-back mandolins;

  3. Absorption (acoustics) - Wikipedia

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

    When sound from a loudspeaker collides with the walls of a room, part of the sound's energy is reflected back into the room, part is transmitted through the walls, and part is absorbed into the walls. Just as the acoustic energy was transmitted through the air as pressure differentials (or deformations), the acoustic energy travels through the ...

  4. Dehumidifier - Wikipedia

    en.wikipedia.org/wiki/Dehumidifier

    Diagram showing airflow through a heat-recovering dehumidifier. Warm, moist air is drawn into the unit at A in the diagram above. This air passes into a crossflow plate heat exchanger (B) where a substantial proportion of the sensible heat is transferred to a cool supply air stream. This process brings the extracted air close to saturation.

  5. D'Addario (manufacturer) - Wikipedia

    en.wikipedia.org/wiki/D'Addario_(manufacturer)

    D'Addario is the world’s largest musical instrument accessories manufacturer, marketing its products under several brands, including D'Addario Fretted, D'Addario Accessories, Evans Drumheads, ProMark Drumsticks, D'Addario Woodwinds, D’Addario Orchestral, and Puresound Snare Wire.

  6. Tone hole - Wikipedia

    en.wikipedia.org/wiki/Tone_hole

    A tone hole is an opening in the body of a wind instrument which, when alternately closed and opened, changes the pitch of the sound produced. Tone holes may serve specific purposes, such as a trill hole or register hole. A tone hole is, "in wind instruments[,] a hole that may be stopped by the finger, or a key, to change the pitch of the tone ...

  7. Humidifier - Wikipedia

    en.wikipedia.org/wiki/Humidifier

    A humidifier is a household appliance or device designed to increase the moisture level in the air within a room or an enclosed space. It achieves this by emitting water droplets or steam into the surrounding air, thereby raising the humidity.

  8. Physics of whistles - Wikipedia

    en.wikipedia.org/wiki/Physics_of_whistles

    A whistle is a device that makes sound from air blown from one end forced through a small opening at the opposite end. They are shaped in a way that allows air to oscillate inside of a chamber in an unstable way. The physical theory of the sound-making process is an example of the application of fluid dynamics or hydrodynamics and aerodynamics ...

  9. Rosette (music) - Wikipedia

    en.wikipedia.org/wiki/Rosette_(music)

    A rosette (from French, meaning little rose), rose, or knot, [1] in the context of musical instruments, is a form of soundhole decoration. The name originated during the medieval period, as a comparison with church windows which were called rose windows.