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  2. A simplified guide to buying a dishwasher - AOL

    www.aol.com/news/simplified-guide-buying...

    Most manufacturers measure noise in adjusted decibels — I recommend looking for a model clocking in at 45 dBA or lower, if you can. ... look for an Energy Star rating before you buy. Dishwasher ...

  3. Noise curve - Wikipedia

    en.wikipedia.org/wiki/Noise_curve

    Noise can be an annoyance that creates fatigue and negatively affects productivity, safety and the ability to communicate. Therefore, standard methodologies for quantifying noise have been developed. Noise curves reflect different standardized means of creating a single number rating for the background noise spectrum in a space.

  4. Sound transmission class - Wikipedia

    en.wikipedia.org/wiki/Sound_transmission_class

    The STC or sound transmission class is a single number method of rating how well wall partitions reduce sound transmission. [3] The STC provides a standardized way to compare products such as doors and windows made by competing manufacturers. A higher number indicates more effective sound insulation than a lower number.

  5. GoodGuide's Dishwasher Ratings: Miele Trumps Maytag - AOL

    www.aol.com/news/2011-03-22-goodguides...

    The Miele G2732SCI outscores more than 450 dishwashers rated by GoodGuide, while Maytag's Built-In Drawer Dishwasher ranks last. Consumer Ally has teamed up with GoodGuide, whose experts have ...

  6. Noise reduction coefficient - Wikipedia

    en.wikipedia.org/wiki/Noise_reduction_coefficient

    The noise reduction coefficient (commonly abbreviated NRC) is a single number value ranging from 0.0 to 1.0 that describes the average sound absorption performance of a material. An NRC of 0.0 indicates the object does not attenuate mid-frequency sounds, but rather reflects sound energy.

  7. Sound reduction index - Wikipedia

    en.wikipedia.org/wiki/Sound_Reduction_Index

    The Sound Reduction Index is expressed in decibels (dB). It is the weighted sound reduction index for a partition or single component only. This is a laboratory-only measurement, which uses knowledge of the relative sizes of the rooms in the test suite, and the reverberation time in the receiving room, and the known level of noise which can pass between the rooms in the suite by other routes ...

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