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2. Jecklin disk - Wikipedia

   en.wikipedia.org/wiki/Jecklin_disk

   Jecklin Disk. A Jecklin disk is a sound-absorbing disk placed between two microphones to create an acoustic "shadow" from one microphone to the other. The resulting two signals can produce a pleasing stereo effect on headphones and loudspeakers but are usually not mono-compatible.

3. Micro perforated plate - Wikipedia

   en.wikipedia.org/wiki/Micro_perforated_plate

   Traditional sound absorbers are porous materials such as mineral wool, glass or polyester fibres. It is not possible to use these materials in harsh environments such as engine compartments. Traditional absorbers have many drawbacks, including pollution, the risk of fire, and problems with the useful lifetime of the absorbing material.

4. Sabin (unit) - Wikipedia

   en.wikipedia.org/wiki/Sabin_(unit)

   In acoustics, the sabin (or more precisely the square foot sabin) is a unit of sound absorption, used for expressing the total effective absorption for the interior of a room. Sound absorption can be expressed in terms of the percentage of energy absorbed compared with the percentage reflected. It can also be expressed as a coefficient, with a ...

5. Gobo (recording) - Wikipedia

   en.wikipedia.org/wiki/Gobo_(recording)

   Gobo is a sound recording term for a movable acoustic isolation panel. In typical use, a recording engineer might put a gobo between two musicians to increase the isolation of their microphones from each other. The origin of the term "gobo" is obscure, but is most likely short for "go-between".

6. Acoustic quieting - Wikipedia

   en.wikipedia.org/wiki/Acoustic_quieting

   A sound proof room, showing acoustic damping tiles used for noise absorption and soundproofing. Noise absorption: In architectural acoustics, unwanted sounds can be absorbed rather than reflected inside the room of an observer. This is useful for noises with no point source and when a listener needs to hear sounds only from a point source and ...

7. Sound transmission class - Wikipedia

   en.wikipedia.org/wiki/Sound_transmission_class

   Sound absorption entails turning acoustical energy into some other form of energy, usually heat. [18] Adding absorptive materials to the interior surfaces of rooms, for example fabric-faced fiberglass panels and thick curtains, will result in a decrease of reverberated sound energy within the room.