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2. Amaurosis fugax - Wikipedia

   en.wikipedia.org/wiki/Amaurosis_fugax

   Amaurosis fugax. The arteries of the choroid and iris. The greater part of the sclera has been removed. Amaurosis fugax (Greek: ἀμαύρωσις, amaurosis meaning 'darkening', 'dark', or 'obscure', Latin: fugax meaning 'fleeting') is a painless temporary loss of vision in one or both eyes. [3]

3. Sound transmission class - Wikipedia

   en.wikipedia.org/wiki/Sound_transmission_class

   A 0.1% open area will reduce the transmission loss from 40 dB to 30 dB, which is typical of walls where caulking has not been applied effectively [26] Partitions that are inadequately sealed and contain back-to-back electrical boxes, untreated recessed lighting and unsealed pipes offer flanking paths for sound and significant leakage.

4. Radiation effects on optical fibers - Wikipedia

   en.wikipedia.org/wiki/Radiation_effects_on...

   In the professional literature, the effect is often named Radiation Induced Attenuation (RIA), or Radiation-induced darkening. The loss of power or 'darkening' occurs because the chemical bonds forming the optical fiber core are disrupted by the impinging high energy resulting in the appearance of new electronic transition states giving rise to additional absorption in the wavelength regions ...

5. Prairie-Masker - Wikipedia

   en.wikipedia.org/wiki/Prairie-Masker

   Prairie-Masker is a radiated noise reduction system fitted to some [clarification needed] western warships, including the Oliver Hazard Perry -class frigates, Spruance and Arleigh Burke -class destroyers, and the Ticonderoga -class cruisers of the US Navy. The system was also installed during the 1960s on a limited number of post WWII Guppy III ...

6. Sound reduction index - Wikipedia

   en.wikipedia.org/wiki/Sound_Reduction_Index

   The Sound Reduction Index is expressed in decibels (dB). It is the weighted sound reduction index for a partition or single component only. This is a laboratory-only measurement, which uses knowledge of the relative sizes of the rooms in the test suite, and the reverberation time in the receiving room, and the known level of noise which can pass between the rooms in the suite by other routes ...

7. Soundproofing - Wikipedia

   en.wikipedia.org/wiki/Soundproofing

   A pair of headphones being tested inside an anechoic chamber for soundproofing. Soundproofing is any means of impeding sound propagation.There are several methods employed including increasing the distance between the source and receiver, decoupling, using noise barriers to reflect or absorb the energy of the sound waves, using damping structures such as sound baffles for absorption, or using ...