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2. Dropped ceiling - Wikipedia

   en.wikipedia.org/wiki/Dropped_ceiling

   A dropped ceiling is a secondary ceiling, hung below the main (structural) ceiling. It may also be referred to as a drop ceiling, T-bar ceiling, false ceiling, suspended ceiling, grid ceiling, drop in ceiling, drop out ceiling, or ceiling tiles and is a staple of modern construction and architecture in both residential and commercial applications.

3. Room acoustics - Wikipedia

   en.wikipedia.org/wiki/Room_acoustics

   The architectural details of a room influences the behaviour of sound waves within it, with the effects varying by frequency. Acoustic reflection , diffraction , and diffusion can combine to create audible phenomena such as room modes and standing waves at specific frequencies and locations, echos , and unique reverberation patterns.

4. Architectural acoustics - Wikipedia

   en.wikipedia.org/wiki/Architectural_acoustics

   The typical sound paths are ceilings, room partitions, acoustic ceiling panels (such as wood dropped ceiling panels), doors, windows, flanking, ducting and other penetrations. Technical solutions depend on the source of the noise and the path of acoustic transmission , for example noise by steps or noise by (air, water) flow vibrations.

5. Acoustical ceiling - Wikipedia

   en.wikipedia.org/?title=Acoustical_ceiling&...

   This page was last edited on 6 April 2012, at 05:25 (UTC).; Text is available under the Creative Commons Attribution-ShareAlike 4.0 License; additional terms may ...

6. Line array - Wikipedia

   en.wikipedia.org/wiki/Line_array

   Sound intensity is the acoustic power per unit area, and it decreases as the surface area increases since the acoustic power is spread over a greater area. The ratio between two acoustic pressures in deciBels is expressed by the equation dB = 20log(p1/p2), so for every doubling of distance from the point source p1 = 1 and p2 = 2, thus there is ...

7. Popcorn ceiling - Wikipedia

   en.wikipedia.org/wiki/Popcorn_ceiling

   Popcorn ceiling texture. A popcorn ceiling, also known as a stipple ceiling or acoustic ceiling, is a ceiling with one of a variety of spray-on or paint-on treatments. [1] The bumpy surface is created by tiny particles of vermiculite or polystyrene, which gives the ceiling sound-deadening properties. Mixtures are available in fine, medium, and ...