Pediatric Research Facility Noise and Vibration Design ... · PDF filePediatric Research...
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Pediatric Research Facility Noise and Vibration Design Case Study Jack B. Evans, PE Austin, TX USA Evans<at>JEAcoustics.com Seminar 36, 1/26/09, 2:15 pm, Dr. Lily Wang, PhD, PE, Chair Noise and Vibration Effects on Staff Performance and Patient Welfare in Healthcare Facilities
Transcript of Pediatric Research Facility Noise and Vibration Design ... · PDF filePediatric Research...
2009 ASHRAE Winter Conference
Pediatric Research Facility Noiseand Vibration Design Case Study
Jack B. Evans, PE
Austin, TX USA
Evans<at>JEAcoustics.comSeminar 36, 1/26/09, 2:15 pm, Dr. Lily Wang, PhD, PE, Chair
Noise and Vibration Effects on Staff Performance and Patient Welfare in Healthcare Facilities
Seminar 36: Noise and Vibration Effects
on Staff Performance and Patient WelfareSlide #12009 ASHRAE Winter Conference
Noise and Vibration Design for a Pediatric Research Facility- A Case Study
• ABSTRACT - A case-study regarding vibration and noise control design for aPediatric Research Institute research building will be presented. The facilityincorporates a small mammal vivarium with animal holding rooms, procedure rooms,cage-rack wash and other support facilities. Two floors of research laboratory andlaboratory support spaces are above the vivarium that accommodate microscopy andother vibration sensitive research instruments. Each floor has research andadministrative office and meeting spaces.
• Small animal feeding and reproduction rates are reduced when the populations arestressed by noise and vibration. Scientific instruments are disturbed by lowfrequency noise and vibration. Design criteria for permissible building vibration andcontinuous background noise will be presented with their sources and bases.
• Measurement evaluation results on the building site will be contrasted with criteria onspectral analysis charts. The measures incorporated in design to mitigate vibrationand noise from external sources will be discussed, along with design measures tocontrol interior building noise and vibration from occupants and building systems.Examples of conventional structural vibration control and building equipment vibrationisolation will be compared with novel methods of reducing floor-to-floor vibrationtransmission.
• Building layout plans will be shown with photos of the building under construction.Overall success of the design and construction effort will be presented. Post-construction spectral analysis measurements of building vibration are presented.
Seminar 36: Noise and Vibration Effects
on Staff Performance and Patient WelfareSlide #22009 ASHRAE Winter Conference
Pediatric Research FacilityNoise & Vibration Control - Introduction
• Research facility with a vivarium and two floors of laboratory space
• Noise and vibration control critical to animal populations, sensitiveinstruments and research staff communication and comfort
• Institution mandated basic acoustical & vibration criteria
• Building architects and engineers implemented consultant’srecommendations to meet criteria
• Final results achieved criteria.
Seminar 36: Noise and Vibration Effects
on Staff Performance and Patient WelfareSlide #32009 ASHRAE Winter Conference
Pediatric Research FacilityNoise & Vibration Control - Problem Description
• Small animal feeding and reproduction rates arereduced when the populations are stressed bynoise and vibration– Possibly related to survival instinctual reactions
– Predator paw impacts, wing air noise
• Scientific instruments are disturbed by lowfrequency noise and vibration– Microscope and Imaging visual resolution
• Design stiff building structure to mitigate floorvibration and low noise building HVAC systemsto minimize low frequency noise
Seminar 36: Noise and Vibration Effects
on Staff Performance and Patient WelfareSlide #42009 ASHRAE Winter Conference
Pediatric Research FacilityNoise & Vibration Control - Design Criteria
Seminar 36: Noise and Vibration Effects
on Staff Performance and Patient WelfareSlide #52009 ASHRAE Winter Conference
Pediatric Research FacilityNoise & Vibration Control - Facility Description
Level 1Slab-on-Grade:
Entry, Vivarium, Dock,
Pump Room, Exec.
Office & Conf. Space
Levels 2 & 3Pan-Joist Slabs:
Lab Support, Labs
and Research Offices
Level 4 PenthousePan-Joists Slabs:
AHU, Exhaust &
Mechanical Systems
Seminar 36: Noise and Vibration Effects
on Staff Performance and Patient WelfareSlide #62009 ASHRAE Winter Conference
Pediatric Research FacilityNoise & Vibration Control - Site Evaluation
• Ambient Airborne Noise and Ground Borne VibrationMeasurements On-Site Near 3 of 4 Boring Locations– Airborne Sound (Lp & Ln) - LDL 824
– Ground Borne Vibration - LDL 2900-2 Ch (X, Y & Z)
Seminar 36: Noise and Vibration Effects
on Staff Performance and Patient WelfareSlide #72009 ASHRAE Winter Conference
Pediatric Research FacilityNoise & Vibration Control - Site Evaluation
• Ambient Pre-construction Airborne Noise and Ground Borne Vibration
– Near boring locations, B-1, B-3 & B-4
– Ambient Airborne Sound 1/3 Octave - Stats (Ln) + A & C Wtg.
– Ground Borne 1/3 Octave: Leq & Lmax , X, Y & Z
– Ground Borne 3/2 Hz Narrow Band: Leq & Lmax, X, Y & Z
Ambient Sound (Ln) Ground Borne Vibrn (OB/3) Ground Borne Vibrn (3/4 Hz)
Seminar 36: Noise and Vibration Effects
on Staff Performance and Patient WelfareSlide #82009 ASHRAE Winter Conference
Pediatric Research FacilityNoise & Vibration Control - Issues
• Vivarium Animal Holding & Procedure Rooms
– High Frequency Noise, continuous and transient
– Floor Impacts & Vibration affecting animals
– Floor Impacts & Vibration affecting Mics & MRI
• Laboratory (outer bays)
– Ambient noise affecting staff communication,
fatigue and annoyance
• Laboratory Support (inner bays)
– Floor vibration affecting microscopes & sensitive
instruments and/or research apparata
– Low Frequency Noise capable of inducing vibrationinto lightweight structures and lab equipment
• Corridors & Traffic Aisles
– Footfall and Rolling Cart vibration inputs to structure
• Office & Conference Acoustics & Privacy
Seminar 36: Noise and Vibration Effects
on Staff Performance and Patient WelfareSlide #92009 ASHRAE Winter Conference
Pediatric Research FacilityNoise & Vibration Control - Recommendations
• Vivarium Animal Holding & Procedure Rooms
– Slab-on-grade on deep highly compacted fill with perimeter isolation joint
• Flexible connections or vibration isolation support for rigid items crossing isolation
– Noise Barrier demising partition and floor-ceiling assemblies
• Special detailing to separate cage rack wash from holding
– Exhaust inlet and supply discharge attenuation for (tonal) Venturi air valves
• Laboratory, Laboratory Support & Floor-to-Floor Transmissions
– All risers vibration isolated > 1m (3’) radius from building columns
• Includes conduits, “static” and gravity flow pipes as well as pumped fluids
– Attenuation for (tonal) Venturi air valves
– HVAC and Exhaust fan and trunk duct attenuation for low frequency noise
• Corridors & Traffic Aisles
– Short, stiff structural bay for inner lab support corridor
• Office & Conference Acoustics & Privacy
– Demising partition and floor-ceiling assembly noise barriers
– Acoustical seals for penetrations, doors, window mullion/partition junctions
– HVAC supply and return duct attenuation for privacy/cross-talk
Seminar 36: Noise and Vibration Effects
on Staff Performance and Patient WelfareSlide #102009 ASHRAE Winter Conference
Pediatric Research FacilityNoise & Vibration Control - Examples
Seminar 36: Noise and Vibration Effects
on Staff Performance and Patient WelfareSlide #112009 ASHRAE Winter Conference
Pediatric Research FacilityVibration Control - Results & Conclusions
• 3-Axis floor vibration at substantial completion (prior to occupancy)
• X, Y & Z spectra demonstrate conformance with 2000 �in/sec rms criteria
• Isolated slab-on-grade floor is “quieter” than undamped suspended floor
– Ground floor post-occupancy amplitudes are anticipated to increase (~8-12 dB).
– Suspended floor post-occupancy amplitudes may increase more (~12-20 dB).
Seminar 36: Noise and Vibration Effects
on Staff Performance and Patient WelfareSlide #122009 ASHRAE Winter Conference
Pediatric Research FacilityNoise Control - Results & Conclusions
• Ambient Equivalent Levels at substantial completion (prior to occupancy)
• Continuous background levels generally conform with Room Criteria (RC)
• Exhaust hood levels in Labs vary with on/off and open/closed sash.
• 31, 63 Hz octaves confirm with “B” region limits of RCs for induced vibration
• 4,000 Hz octave complies with RC spectrum without tonal increase, re:rodent hearing sensitivity.
Seminar 36: Noise and Vibration Effects
on Staff Performance and Patient WelfareSlide #132009 ASHRAE Winter Conference
Pediatric Research Facility Case Study
• Acknowledgments
– Owner: University of Texas System OFPC
– Design & Construction Partners:
• HOK Architects & Engineers, Houston
• HenselPhelps Construction Services
• Thank you for your attention
• Any Questions?
