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  2. Campbell diagram - Wikipedia

    en.wikipedia.org/wiki/Campbell_diagram

    In acoustical engineering, the Campbell diagram would represent the pressure spectrum waterfall plot vs the machine's shaft rotation speed (sometimes also called 3D noise map). References [ edit ]

  3. Interferometric visibility - Wikipedia

    en.wikipedia.org/wiki/Interferometric_visibility

    The interferometric visibility (also known as interference visibility and fringe visibility, or just visibility when in context) is a measure of the contrast of interference in any system subject to wave superposition. Examples include as optics, quantum mechanics, water waves, sound waves, or electrical signals.

  4. Wave interference - Wikipedia

    en.wikipedia.org/wiki/Wave_interference

    In physics, interference is a phenomenon in which two coherent waves are combined by adding their intensities or displacements with due consideration for their phase difference. The resultant wave may have greater intensity ( constructive interference ) or lower amplitude ( destructive interference ) if the two waves are in phase or out of ...

  5. Air-wedge shearing interferometer - Wikipedia

    en.wikipedia.org/wiki/Air-wedge_shearing...

    To minimize image aberrations the angle plane of the glass wedges has to be placed orthogonal to the angle plane of the air-wedge. Because intensity of Fresnel reflections from a glass surface are polarization and angle dependent, it is necessary to keep the air-wedge plane nearly perpendicular to the incident beam (±5deg) to minimize instrumentally induced intensity variation.

  6. Coherence (physics) - Wikipedia

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

    As the delay is changed by half a period, the interference switches between constructive and destructive. The black lines indicate the interference envelope, which gives the degree of coherence. Although the waves in Figures 2 and 3 have different time durations, they have the same coherence time.

  7. Electromagnetic compatibility - Wikipedia

    en.wikipedia.org/wiki/Electromagnetic_compatibility

    Interference mitigation and hence electromagnetic compatibility may be achieved by addressing any or all of these issues, i.e., quieting the sources of interference, inhibiting coupling paths and/or hardening the potential victims. In practice, many of the engineering techniques used, such as grounding and shielding, apply to all three issues.

  8. Michelson interferometer - Wikipedia

    en.wikipedia.org/wiki/Michelson_interferometer

    At every point on the interference pattern, the power that is not directed to the detector at E is rather present in a beam (not shown) returning in the direction of the source. Figure 3. Formation of fringes in a Michelson interferometer This photo shows the fringe pattern formed by the Michelson interferometer, using monochromatic light ...

  9. Coherence length - Wikipedia

    en.wikipedia.org/wiki/Coherence_length

    In physics, coherence length is the propagation distance over which a coherent wave (e.g. an electromagnetic wave) maintains a specified degree of coherence. Wave interference is strong when the paths taken by all of the interfering waves differ by less than the coherence length. A wave with a longer coherence length is closer to a perfect ...