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2. Sound attenuator - Wikipedia

   en.wikipedia.org/wiki/Sound_attenuator

   An inner perforated layer of light gauge sheet metal (baffle) The baffle is then filled with sound-absorptive insulation In high velocity systems, or when there is a concern for particulate matter in the air stream, a bagged or mylar-faced insulation is used. Packless sound attenuators do not include sound-absorptive insulation.

3. Sound transmission class - Wikipedia

   en.wikipedia.org/wiki/Sound_transmission_class

   Interior walls with 1 sheet of 1 ⁄ 2-inch (13 mm) gypsum wallboard on either side of 2x4 (1 + 1 ⁄ 2 in × 3 + 1 ⁄ 2 in or 38 mm × 89 mm) wood studs spaced 16 inches (410 mm) on-center with no fiberglass insulation filling each stud cavity have an STC of about 33. [14]

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. Baffle (heat transfer) - Wikipedia

   en.wikipedia.org/wiki/Baffle_(heat_transfer)

   In this case the baffle helps increase the efficiency of the stove as more heat leaves the gas before it exits. The baffles prevent the rotational flow without affecting radial or longitudinal flow. The tank is provided with baffles which prevent swirling and vortex formation. Except in very large tanks, four(4) baffles are placed.

6. Sound baffle - Wikipedia

   en.wikipedia.org/wiki/Sound_baffle

   Sound baffles are also used in speaker cabinets to absorb energy from the pressure created by the speakers, thus reducing cabinet resonance. In 1973, Pearl P. Randolph, a school bus driver in Virginia, won a new school bus in a national contest held by Wayne Corporation for the suggestion that sound baffles be installed in the ceiling of school ...

7. Minnesota Parents Who Locked Their Kids in Cages for ‘Their ...

   www.aol.com/lifestyle/minnesota-parents-locked...

   A Minnesota couple has reportedly been sentenced to four years after they locked their children in cages for "their safety." Benjamin and Christina Cotton from Red Wing, were sentenced by a ...