18 Common Noise Control Problems

ProblemSolutionReferences

Limited silencer connection sizes

1. Limited silencer connection sizes

"Fit-the-duct" silencers

"Fit-the-duct" silencers
"Fit-the-AHU" silencers
Baystate Medical Center
Charles Tupper Building
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Low frequency noise

2. Low frequency noise

Low frequency silencers

Low frequency silencers
Waterpark Office Building
Metro Center
Ajax-Pickering Hospital
Gravenhurst Institute
One London Place
CBC Headquarters
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Insufficient straight duct

3. Insufficient straight duct

Elbow silencers

Elbow silencers
Transitional silencers
Baystate Medical Center
Metro Center
Metropolitan Life Building
Motorola Facility
Autoroute Tunnel
Power Station
Gateway Arena
Elbow silencers SS5
Transitional silencers SS6
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Duct breakout noise

4. Duct breakout noise

HTL silencers

HTL silencers
HTL ductwork
Charles Tupper Office Building
One London Place
Gateway Arena
CBC Headquarters
Ajax-Pickering Hospital
HTL silencers SS7
HTL ductwork SS7
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Compounded problems

5. Compounded problems

Various products

Various products
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Rooftop unit noise

6. Rooftop unit noise

Elbow HTL silencers

Elbow silencers
HTL silencers
Film House Studios
Niagara Casino
Nortel Plant Infrastructure
Camden Amphitheater
Elbow silencers SS5
HTL silencers SS7
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High velocity airflow

7. High velocity airflow

"EX" model silencers

"EX" model silencers
Low Pressure Drop silencers
IBM Celestica
Chicago Tribune Office Building
UofT Power Plant
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Excessive pressure drop / energy consumption

8. Excessive pressure drop / energy consumption

"EX” model silencers

"EX" model silencers
Low Pressure Drop silencers
Axial Cone silencers
QueensU Library
Cape Breton Hospital
Man. Cogeneration Plant
Semiconductor Facility
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Insufficient duct length

9. Insufficient duct length

Fan silencers, short silencers, acoustical louvers

Fan silencers
Short silencers
Acoustical Louvers
Texas Power Station
Pickering Community Center
UofT Power Plant
NASA Clean Room
Goderich Ventilation Shaft
Motorola Semiconductor Facility
Fan silencers SS10
Short silencers SS13
Acoustical Louvers SS14
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Acoustical duct lining

10. Acoustical duct lining

All silencers

All silencers
IBM HQ Office Building
Sunnybrook Health Science Center
Green Timbers School
CBC Headquarters
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Exposed glass fiber ducts

11. Exposed glass fiber ducts

Film Lined silencers, No-Media silencers, IAQ silencers

Film Lined silencers
No-Media silencers
IAQ silencers
Bruce Peninsula Health Care
Motorola Semiconductor Facility
Cape Breton Hospital
Motorola Semiconductor Facility 2
Film Lined silencers SS2
No-Media silencers SS3
IAQ silencers SS15
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12. Unreliable ratings

All Vibro-Acoustics’ silencers

NVLAP Lab Code: 100424-0

All Vibro-Acoustics’ silencers

Litton Systems Clean Room
Ajax-Pickering Hospital
Kellogg's Manufacturing
Wyeth-Lederle Vaccines
National Arts Center
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Unacceptable installed performance

13. Unacceptable installed performance

 

All silencers: mock-up testing
Waterpark Office Building
Metropolitan Life Building
Motorola Semiconductor Facility
Lietrim Computer Center
CBC Headquarters
Toronto Skydome
Hawaii NC-20 Studio
Plenum silencers SS12
Short Silencers SS13
Acoustical Louvers SS14
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Environmental noise

14. Environmental noise

Plenum silencers, Short silencers, Acoustical Louvers

Plenum silencers
Short silencers
Acoustical Louvers
Ajax-Pickering Hospital
Niagara Casino
Goderich Ventilation Shaft
403/421 Bloor Office Building
Guggenheim Storage Building
York Admin Center
Plenum silencers SS12
Short silencers SS13
Acoustical Louvers SS14
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15. Severe environmental conditions

 

All silencers: mock-up testing
Texas Power Station
Niagara Casino
Manchester Cogeneration Plant
Goderich Ventilation Shaft
Kellogg's Manufacturing
Armstrong Manufacturing Plant
William Davis Computer Center
Wyeth-Lederle Vaccines
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Very small equipment rooms

16. Very small equipment rooms

All silencers: mock-up testing

All silencers: mock-up testing
Pathology Building, NU
Wyeth-Lederle Vaccines
BCE Place
Shipp Center
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Fans in occupied space

17. Fans in occupied space

All silencers: mock-up testing

All silencers: mock-up testing
Niagara Courthouse Theater
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18. Ultra critical sound criteria

 

All silencers: mock-up testing
Roy Thompson Hall
National Arts Center
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