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Architectural acoustics
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== Mechanical equipment noise == Building services noise control is the science of controlling noise produced by: *[[HVAC]] (heating, ventilation, air conditioning) systems *[[Elevator]]s *[[Electrical generator]]s positioned within or attached to a building *Any other building service infrastructure component that emits sound. Inadequate control may lead to elevated [[Sound intensity level|sound level]]s within the space which can be annoying and reduce speech intelligibility. Typical improvements are [[vibration isolation]] of mechanical equipment, and [[Sound Attenuators|sound attenuators]] in ductwork. [[Sound masking]] can also be created by adjusting HVAC noise to a predetermined level.
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