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  2. Noise control - Wikipedia

    en.wikipedia.org/wiki/Noise_control

    Industrial noise control is a subset of interior architectural control of noise, with emphasis on specific methods of sound isolation from industrial machinery and for protection of workers at their task stations. Sound masking is the active addition of noise to reduce the annoyance of certain sounds, the opposite of soundproofing.

  3. How to Reduce Noise Pollution in Your Yard

    www.aol.com/news/2010-05-27-how-to-reduce-noise...

    Several "green" solutions exist that, when combined, can reduce the perception of noise. Here are some things you can do. Show comments. Advertisement. Advertisement. Holiday Shopping Guides.

  4. Noise pollution - Wikipedia

    en.wikipedia.org/wiki/Noise_pollution

    The CityLink sound tube in Flemington, Melbourne, Australia, is designed to reduce roadway noise without detracting from the area's aesthetics. A man inserting an earplug in his ear to reduce the noise exposure. The Hierarchy of Controls concept is often used to reduce noise in the environment or the workplace. Engineering noise controls can be ...

  5. Noise temperature - Wikipedia

    en.wikipedia.org/wiki/Noise_temperature

    For instance, assume an amplifier has a noise temperature 870 K and thus a noise figure of 6 dB. If that amplifier is used to amplify a source having a noise temperature of about room temperature (290 K), as many sources do, then the insertion of that amplifier would reduce the SNR of a signal by 6 dB.

  6. 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 ...

  7. File:20230609 Average noise levels outside US homes.svg

    en.wikipedia.org/wiki/File:20230609_Average...

    Suggested caption: More than a quarter of US residences have average outside noise levels exceeding the maximum nighttime outside noise level recommended by the World Health Organization. Technical note: most SVG code was automatically generated by the "Pie charts" spreadsheet linked at User:RCraig09/Excel to XML for SVG. Minor additions and ...

  8. Sound transmission class - Wikipedia

    en.wikipedia.org/wiki/Sound_transmission_class

    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 sounds, but not music or machinery noise as these sources contain more low frequency energy than speech. [1]

  9. Noise floor - Wikipedia

    en.wikipedia.org/wiki/Noise_floor

    The noise floor limits the smallest measurement that can be taken with certainty since any measured amplitude can on average be no less than the noise floor. A common way to lower the noise floor in electronics systems is to cool the system to reduce thermal noise, when this is the major noise source.

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