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2. Loudspeaker enclosure - Wikipedia

   en.wikipedia.org/wiki/Loudspeaker_enclosure

   In a closed-box loudspeaker, the air inside the box acts as a spring, returning the cone to the zero position in the absence of a signal. A significant increase in the effective volume of a closed-box loudspeaker can be achieved by a filling of fibrous material, typically fiberglass, bonded acetate fiber (BAF) or long-fiber wool.

3. Sound reinforcement system - Wikipedia

   en.wikipedia.org/wiki/Sound_reinforcement_system

   During the installation phase, audio engineers ensure that high-power electrical components are safely installed and connected and that ceiling or wall-mounted speakers are properly mounted (or "flown") onto rigging. When the sound reinforcement components are installed, the audio engineers test and calibrate the system so that its sound ...

4. Sound baffle - Wikipedia

   en.wikipedia.org/wiki/Sound_baffle

   Sound baffles are also used in speaker cabinets to absorb energy from the pressure created by the speakers, thus reducing cabinet resonance. In 1973, Pearl P. Randolph, a school bus driver in Virginia, won a new school bus in a national contest held by Wayne Corporation for the suggestion that sound baffles be installed in the ceiling of school ...

5. SpeakerCraft - Wikipedia

   en.wikipedia.org/wiki/SpeakerCraft

   SpeakerCraft is an American [1] manufacturer of custom-installed audio/video and home theater products based in Petaluma, California.Founded in 1976 by Edward Haase, Ken Humphreys, and Eugene Humphreys, the company evolved from a retail stereo store and original equipment manufacturer to a designer and installer of custom audio systems.

6. Dropped ceiling - Wikipedia

   en.wikipedia.org/wiki/Dropped_ceiling

   An older, less common type of dropped ceiling is the concealed grid system, which uses a method of interlocking panels into one another and the grid with the use of small strips of metal called 'splines', thus making it difficult to remove panels to gain access above the ceiling without damaging the installation or the panels. Normally, they ...

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8. Passive radiator (speaker) - Wikipedia

   en.wikipedia.org/wiki/Passive_radiator_(speaker)

   The middle speaker is a real loudspeaker. The top and bottom cones are passive radiators. In the same way as a ported loudspeaker, a passive radiator system uses the sound pressure otherwise trapped in the enclosure to excite a resonance that makes it easier for the speaker system to create the deepest pitches (e.g., basslines). The passive ...

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