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2. Acoustic quieting - Wikipedia

   en.wikipedia.org/wiki/Acoustic_quieting

   Sound reflections: by limiting the reflection using many methods, e.g. by using acoustic absorption (deadening) materials, trapping the sound, opening a "window" to let sound out, etc. By analyzing the entire sequence of events, from the source to the observer, an acoustic engineer can provide many ways to quieten the machine.

3. 6 Home Depot Products Under $50 That Will Reduce Your ... - AOL

   www.aol.com/finance/6-home-depot-products-under...

   Here are six products from Home Depot that will help you reduce your utility bills this winter. Orbit Programmable Thermostat. ... Frost King Window Insulation Kit. Price: $4.98.

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. 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 ...

6. Best $25 To Spend at Home Depot on Cyber Monday - AOL

   www.aol.com/best-25-spend-home-depot-170227451.html

   Home Depot is proving that the dollar still has legs this holiday season with deep Cyber Monday discounts that will make those DIY home improvement projects more affordable than ever -- and just in...

7. Noise-cancelling headphones - Wikipedia

   en.wikipedia.org/wiki/Noise-cancelling_headphones

   The opposite sound waves collide and are eliminated or "cancelled" (destructive interference). Most noise-cancelling headsets in the consumer market generate the noise-cancelling waveform in real time with analog technology. In contrast, other active noise and vibration control products use soft real-time digital processing. According to an ...