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2. Soundproofing - Wikipedia

   en.wikipedia.org/wiki/Soundproofing

   The main focus of a residential sound program in existing structures is the windows and doors. Solid wood doors are a better sound barrier than hollow doors. [9] Curtains can be used to dampen sound, either through use of heavy materials or through the use of air chambers known as honeycombs. Single-, double- and triple-honeycomb designs ...

3. Noise control - Wikipedia

   en.wikipedia.org/wiki/Noise_control

   An effective model for noise control is the source, path, and receiver model by Bolt and Ingard. [9] Hazardous noise can be controlled by reducing the noise output at its source, minimizing the noise as it travels along a path to the listener, and providing equipment to the listener or receiver to attenuate the noise.

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. You can find huge savings in Amazon's secret overstock ... - AOL

   www.aol.com/lifestyle/you-can-find-huge-savings...

   They offer up to 60 hours of listening time and were designed with noise cancellation in mind to keep disrupting sounds from affecting your listening experience. Save $40 with coupon $40 at Amazon

6. 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 ...

7. 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.