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  2. Template:Sound Level Label Examples - Wikipedia

    en.wikipedia.org/wiki/Template:Sound_Level_Label...

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  3. Node (physics) - Wikipedia

    en.wikipedia.org/wiki/Node_(physics)

    Fixed boundary: Examples of this type of boundary are the attachment point of a guitar string, the closed end of an open pipe like an organ pipe, or a woodwind pipe, the periphery of a drumhead, a transmission line with the end short circuited, or the mirrors at the ends of a laser cavity. In this type, the amplitude of the wave is forced to ...

  4. Speech interference level - Wikipedia

    en.wikipedia.org/wiki/Speech_Interference_Level

    Speech Interference Level (SIL) is an acoustical parameter calculated from sound pressure levels measured in octave bands.It is used to characterize a noise signal in the frequency range where the human ear has its highest sensitivity.

  5. Audio system measurements - Wikipedia

    en.wikipedia.org/wiki/Audio_system_measurements

    Example: A 16-bit system has 2 16 different possibilities, from 0 – 65,535. The smallest signal without dithering is 1, so the number of different levels is one less, 2 16 − 1. So for a 16-bit digital system, the Dynamic Range is 20·log(2 16 − 1) ≈ 96 dB. Sample accuracy/synchronisation Not as much a specification as an ability.

  6. Earth–ionosphere waveguide - Wikipedia

    en.wikipedia.org/wiki/Earth–ionosphere_waveguide

    Therefore, essentially only the first two modes are involved in the wave propagation The first interference minimum between these two modes is at the same distance as that of the last interference minimum of ray theory indicating the equivalence of both theories [7] As seen in Figure 3, the spacing between the mode interference minima is ...

  7. Beat (acoustics) - Wikipedia

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

    If a graph is drawn to show the function corresponding to the total sound of two strings, it can be seen that maxima and minima are no longer constant (as when a pure note is played), but change over time: when the two waves are nearly 180 degrees out of phase the maxima of one wave cancel the minima of the other, whereas when they are nearly ...

  8. Template:Sound measurements - Wikipedia

    en.wikipedia.org/wiki/Template:Sound_measurements

    Sound pressure p, SPL, L PA Particle velocity v, SVL Particle displacement δ Sound intensity I, SIL Sound power P, SWL, L WA Sound energy W Sound energy density w Sound exposure E, SEL Acoustic impedance Z Audio frequency AF Transmission loss TL

  9. Wikipedia : Manual of Style/Chemistry/Structure drawing

    en.wikipedia.org/.../Chemistry/Structure_drawing

    The program can read and write many file formats, other than its proprietary sketch file format (.skc) and can export PNG files. If SVG files are required, it is recommended that structure diagrams be exported as enhanced metafiles (.emf) which can be read by Inkscape and other image editors..