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  2. Wikipedia:Free sound resources - Wikipedia

    en.wikipedia.org/wiki/Wikipedia:Free_sound_resources

    There are a number of free sound effects resources of public domain or free content sound recordings appropriate for Wikipedia use available online, and as well as in other contexts. All files should be converted to ogg , Wikipedia's patent-free format of choice.

  3. File:Cause-effect diagram for acoustics.svg - Wikipedia

    en.wikipedia.org/wiki/File:Cause-effect_diagram...

    This work is ineligible for copyright and therefore in the public domain because it consists entirely of information that is common property and contains no original authorship. Captions English

  4. Heart sounds - Wikipedia

    en.wikipedia.org/wiki/Heart_sounds

    Using electronic stethoscopes, it is possible to record heart sounds via direct output to an external recording device, such as a laptop or MP3 recorder. The same connection can be used to listen to the previously recorded auscultation through the stethoscope headphones, allowing for a more detailed study of murmurs and other heart sounds, for ...

  5. Egophony - Wikipedia

    en.wikipedia.org/wiki/Egophony

    Egophony (British English, aegophony) is an increased resonance of voice sounds [1] heard when auscultating the lungs, often caused by lung consolidation and fibrosis.It is due to enhanced transmission of high-frequency sound across fluid, such as in abnormal lung tissue, with lower frequencies filtered out.

  6. Stethoscope - Wikipedia

    en.wikipedia.org/wiki/Stethoscope

    Parts of a binaural stethoscope Acoustic stethoscope, with the bell upwards. Acoustic stethoscopes operate on the transmission of sound from the chest piece, via air-filled hollow tubes, to the listener's ears. The chestpiece usually consists of two sides that can be placed against the patient for sensing sound: a diaphragm (plastic disc) or ...

  7. Tonnetz - Wikipedia

    en.wikipedia.org/wiki/Tonnetz

    Euler's Tonnetz. The Tonnetz originally appeared in Leonhard Euler's 1739 Tentamen novae theoriae musicae ex certissismis harmoniae principiis dilucide expositae.Euler's Tonnetz, pictured at left, shows the triadic relationships of the perfect fifth and the major third: at the top of the image is the note F, and to the left underneath is C (a perfect fifth above F), and to the right is A (a ...