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  2. Acoustic foam - Wikipedia

    en.wikipedia.org/wiki/Acoustic_foam

    The objective of acoustic foam is to improve or change a room's sound qualities by controlling residual sound through absorption. [6] This purpose requires strategic placement of acoustic foam panels on walls, ceilings, floors and other surfaces.

  3. Absorption (acoustics) - Wikipedia

    en.wikipedia.org/wiki/Absorption_(acoustics)

    In acoustics, absorption refers to the process by which a material, structure, or object takes in sound energy when sound waves are encountered, as opposed to reflecting the energy. Part of the absorbed energy is transformed into heat and part is transmitted through the absorbing body.

  4. Soundproofing - Wikipedia

    en.wikipedia.org/wiki/Soundproofing

    A pair of headphones being tested inside an anechoic chamber for soundproofing. Soundproofing is any means of impeding sound propagation.There are several methods employed including increasing the distance between the source and receiver, decoupling, using noise barriers to reflect or absorb the energy of the sound waves, using damping structures such as sound baffles for absorption, or using ...

  5. 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.

  6. Sound transmission class - Wikipedia

    en.wikipedia.org/wiki/Sound_transmission_class

    Sound Transmission Class (or STC) is an integer rating of how well a building partition attenuates airborne sound. 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.

  7. Acoustic plaster - Wikipedia

    en.wikipedia.org/wiki/Acoustic_plaster

    A second finishing layer may also be added to create a second system of sound attenuation. [4] If the second density if less than or equal to that of the first layer, the sound attenuation of the second layer would be greater than the first and vice versa. [4] This allows for the flexibility of changing the acoustic properties of the space.

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