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  2. Impedance matching - Wikipedia

    en.wikipedia.org/wiki/Impedance_matching

    In electrical engineering, impedance matching is the practice of designing or adjusting the input impedance or output impedance of an electrical device for a desired value. Often, the desired value is selected to maximize power transfer or minimize signal reflection .

  3. Immittance - Wikipedia

    en.wikipedia.org/wiki/Immittance

    In electronics, an immittance Smith chart can be created by overlaying both the impedance and admittance grids, which is useful for cascading series-connected with parallel-connected electric circuits. This allows for the visualization of changes in impedance or admittance in the system caused by components of either the series or parallel circuit.

  4. Audio system measurements - Wikipedia

    en.wikipedia.org/wiki/Audio_system_measurements

    The measurement is given in % and a lower number is better. Rumble The measure of the low frequency (many tens of Hz) noise contributed by the turntable of an analogue playback system. It is caused by imperfect bearings, uneven motor windings, vibrations in driving bands in some turntables, room vibrations (e.g., from traffic) that is ...

  5. Middle ear - Wikipedia

    en.wikipedia.org/wiki/Middle_ear

    The middle ear matches mechanical impedance, like a lever. Ordinarily, when sound waves in air strike liquid, most of the energy is reflected off the surface of the liquid. The middle ear allows the impedance matching of sound traveling in air to acoustic waves traveling in a system of fluids and membranes in the inner ear. This system should ...

  6. Acoustic waveguide - Wikipedia

    en.wikipedia.org/wiki/Acoustic_waveguide

    A high impedance load (e.g. by plugging the end of the line) will cause a reflected wave in which the direction of the pressure wave is reversed but the sign of the pressure remains the same. Since a transmission line behaves like a four terminal model, one cannot really define or measure the impedance of a transmission line component.

  7. Valerie Bertinelli Shares Bikini Mirror Selfie and Hints at ...

    www.aol.com/lifestyle/valerie-bertinelli-shares...

    Valerie Bertinelli is embracing her body.. The Food Network alum, 64, posted a mirror selfie on Instagram while opening up about the acceptance she felt for her body despite the tough things it ...

  8. Hearing - Wikipedia

    en.wikipedia.org/wiki/Hearing

    The purpose of the middle ear ossicles is to overcome the impedance mismatch between air waves and cochlear waves, by providing impedance matching. Also located in the middle ear are the stapedius muscle and tensor tympani muscle , which protect the hearing mechanism through a stiffening reflex.

  9. Commonwealth leaders say 'time has come' for discussion on ...

    www.aol.com/news/king-charles-queen-camilla...

    APIA, Samoa (Reuters) -Commonwealth leaders, ending a week-long summit in Samoa, said on Saturday the time had come for a discussion on whether Britain should commit to reparations for its role in ...

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