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Meredith Willson
Performing Arts Center |
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Mechanical Noise Control
& Vibration Analysis
Mechanical noise in the
built environment is introduced by a
number of sources, including airborne
sound from HVAC systems, elevator machinery,
fans, plumbing systems, emergency/standby
generators, pumps, and even lighting
systems (e.g. buzzing from dimmers). When
these sources are in contact with structural
elements they can also produce vibration
and structure-borne noise.
Another
common noise problem associated
with HVAC ducting is "cross
talk," which is the transmission
of sound (e.g. conversation)
from one space to another through HVAC
ducting which serves both spaces.
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Design issues related
to mechanical noise control typically
include:
- Development of criteria
to identify acceptable noise levels
from HVAC equipment in occupied spaces.
- Selection and location
of mechanical equipment to meet interior
sound level design criteria.
- Resilient isolation
mounts to de-couple mechanical equipment
and plumbing systems from structure
to reduce vibration and structure-borne
noise.
- Appropriate placement
of concrete curbs and pads under rooftop
equipment to control noise and vibration.
- Sizing and layout of
HVAC ducting to reduce or eliminate
noise caused by turbulent airflow.
- Selection of ancillary
equipment such as silencers, mufflers,
and duct liners to reduce equipment
noise levels.
- Design of equipment
noise mitigation when required to
meet maximum allowable noise levels
at adjacent properties as identified
in the governing noise ordinance or
code.
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Control of mechanical
noise and vibration is critically
important for:
- Hospitals (Operating
Rooms, MRI Installations)
- Medical, Legal,
Social, and Pastoral Counseling Spaces
(cross talk issues)
- Scientific Research
Facilities
- Offices and Conference
Facilities
- Performing Arts
Venues & Theaters
- Schools &
Universities
- Multi-Family
Residential & Hotels
- Public Utilities
Sites
- Mixed-Use Projects
(e.g. Commercial & Residential
spaces in the same building)
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