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  2. 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 ...

  3. Noise reduction coefficient - Wikipedia

    en.wikipedia.org/wiki/Noise_reduction_coefficient

    Absorption coefficients used to calculate NRC are commonly determined in reverberation rooms of qualified acoustical laboratory test facilities using samples of the particular materials of specified size (typically 72 square feet [6.7 m 2] in an 8 ft × 9 ft [2.4 m × 2.7 m] configuration) and appropriate mounting.

  4. Noise control - Wikipedia

    en.wikipedia.org/wiki/Noise_control

    Acoustical wall and ceiling panels are a common commercial and residential solution for noise control in already-constructed buildings. Acoustic panels may be constructed of a variety of materials, though commercial acoustic applications will frequently be composed of fiberglass or mineral wool-based acoustic substrates.

  5. 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.

  6. 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 ...

  7. Acoustical engineering - Wikipedia

    en.wikipedia.org/wiki/Acoustical_engineering

    Acoustical engineering (also known as acoustic engineering) is the branch of engineering dealing with sound and vibration. It includes the application of acoustics , the science of sound and vibration, in technology.

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