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2. Garage door - Wikipedia

   en.wikipedia.org/wiki/Garage_door

   Garage doors can be made of many materials, but steel, aluminum, wood, copper, glass, and vinyl (polyethylene) are the most popular materials. Some manufacturers incorporate foamed-in-place polyurethane insulation within the monolithic panel and sectional garage doors. The side sliding sectional door [5] A lot of space under the garage ceiling ...

3. Roller shutter - Wikipedia

   en.wikipedia.org/wiki/Roller_shutter

   A roller shutter, security shutter, coiling door, roller door or sectional overhead door is a specialized type of door or window shutter consisting of multiple horizontal slats, bars, or web systems interconnected through hinges. The mechanism involves lifting the door to open it and lowering it to close.

4. 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 ...

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. Room acoustics - Wikipedia

   en.wikipedia.org/wiki/Room_acoustics

   Room acoustics is a subfield of acoustics dealing with the behaviour of sound in enclosed or partially-enclosed spaces. The architectural details of a room influences the behaviour of sound waves within it, with the effects varying by frequency.

7. Anechoic chamber - Wikipedia

   en.wikipedia.org/wiki/Anechoic_chamber

   360-degree image of an acoustic anechoic chamber 360-degree image of an electromagnetic anechoic chamber. An anechoic chamber (an-echoic meaning "non-reflective" or "without echoes") is a room designed to stop reflections or echoes of either sound or electromagnetic waves. They are also often isolated from energy entering from their surroundings.