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2. Portable partition - Wikipedia

   en.wikipedia.org/wiki/Portable_partition

   Operable partitions or folding partition walls involve a series of interlocking panels suspended from an overhead track. When extended they utilize seals at the floor, wall, and ceiling to provide acoustical separation. When retracted they stack against a wall, ceiling, closet, or ceiling pocket. [2] [3] [4]

3. Room divider - Wikipedia

   en.wikipedia.org/wiki/Room_divider

   There are a number of different types of room dividers such as cubicle partitions, pipe and drape screens, shoji screens, and walls. Room dividers can be made from many materials, including wood, fabric, plexiglass, framed cotton canvas, pleated fabric or mirrors. Plants, shelves or railings might also be used as dividers.

4. Wall - Wikipedia

   en.wikipedia.org/wiki/Wall

   A partition wall is a usually thin wall that is used to separate or divide a room, primarily a pre-existing one. Partition walls are usually not load-bearing , and can be constructed out of many materials, including steel panels, bricks, cloth, plastic , plasterboard , wood , blocks of clay, terracotta , concrete , and glass.

5. Architectural acoustics - Wikipedia

   en.wikipedia.org/wiki/Architectural_acoustics

   Architectural acoustics can be about achieving good speech intelligibility in a theatre, restaurant or railway station, enhancing the quality of music in a concert hall or recording studio, or suppressing noise to make offices and homes more productive and pleasant places to work and live in. [3] Architectural acoustic design is usually done by ...

6. Acoustic panel - Wikipedia

   en.wikipedia.org/wiki/Acoustic_panel

   An acoustic board is a board made from sound absorbing materials, designed to provide sound insulation. [3] [4] Between two outer walls sound absorbing material is inserted and the wall is porous. Thus, when sound passes through an acoustic board, the intensity of sound is decreased. The loss of sound energy is balanced by producing heat energy.

7. Sound transmission class - Wikipedia

   en.wikipedia.org/wiki/Sound_transmission_class

   In the US, it is widely used to rate interior partitions, ceilings, floors, doors, windows and exterior wall configurations. Outside the US, the ISO Sound Reduction Index (SRI) is used. The STC rating very roughly reflects the decibel reduction of noise that a partition can provide. The STC is useful for evaluating annoyance due to speech ...