NFPA 72 Mass Notification Regulations November 10, 2011.
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Transcript of NFPA 72 Mass Notification Regulations November 10, 2011.
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NFPA 72 Mass Notification Regulations
November 10, 2011
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Acentech Incorporated is a Registered Provider with The American Institute of Architects Continuing Education Systems. Credit earned on completion of this program will be reported to CES Records for AIA members. Certificates of Completion for non-AIA members are available on request.
This program is registered with the AIA/CES for continuing professional education. As such, it does not include content that may be deemed or construed to be an approval or endorsement by the AIA of any material of construction or any method or manner of handling, using, distributing, or dealing in any material or product. Questions related to specific materials, methods, and services will be addressed at the conclusion of this presentation.
November 10, 2011
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NFPA
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Background
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• Mass Notification Systems• Provide “real-time information and instructions to
people in a building, area, site, or installation using intelligible voice communications along with visible signals, text, and graphics, and possibly including tactile or other communication methods”
DoD UFC 4-021-01
NFPA 72, 2007
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• Approved by ANSI in 2009• Chapter 24– Emergency Communications Systems (ECS)
• ECS = EVACS + MNS
NFPA 72, 2010
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• Chapter 24 establishes “Minimum required levels of performance, reliability, and quality of installation for ECS but does not establish the only methods by which these requirements are to be achieved.”– Ex: Controls, Ancillary Functions, Pathway Survivability, and…– Voice Evacuation Messages:
• Sound System Requirements
NFPA 72, 2010
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• Intelligible Voice Messages
“Emergency communications systems shall be capable of the reproduction of prerecorded, synthesized, or live messages with voice intelligibility”
NFPA 72, 2010
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• Intelligible Voice Messages• “Intelligible”• Metrics:
• Common Intelligibility Scale (CIS)• Speech Transmission Index (STI)• Speech Transmission Index for Public Address (STI-PA)• RApid Speech Transmission Index (RASTI)• Articulation Index (AI)• AlCons (Percent Articulation of Consonants)
Speech Intelligibility
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• Speech Transmission Index & Common Intelligibility Scale Commonly used metrics 0.50 STI = 0.70 CIS
Speech Intelligibility
Example: STI
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“The intelligibility of an emergency communication system is considered acceptable if at least 90 percent of the measurement locations within each ADS (acoustically distinguishable space) have a measured STI of not less than 0.45 (0.65 CIS) and an average STI of not less than 0.50 STI (0.70 CIS).”
-NFPA 2010 Annex DExample: STI
Speech Intelligibility
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Acoustically Distinguishable Spaces “distinguished from other spaces due to acoustical,
environmental or use characteristics, such as reverberation time and ambient sound pressure level”
Acoustically Distinguishable Spaces
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Acoustically Distinguishable Spaces
MIT Sloan School of Management, Bruner/Cott Architects and Planners
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Acoustically Distinguishable Spaces
Logan Airport, Terminal A, HOK
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Acoustically Distinguishable Spaces
Phillips Academy, Paresky Commons, Schwartz/Silver Architects
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3-Legged Approach
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Room Acoustics
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Room Acoustics
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Room Acoustics
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Room Acoustics
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HVAC Noise Control
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HVAC Noise Control
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HVAC Noise Control
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HVAC Noise Control
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Loudspeakers
Sound Systems
Miami International Airport: Terminal H Improvements, Rodriguez and Quiroga Architects; South Terminal Expansion, Borrelli + Partners
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Sound Systems
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Sound Systems
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Sound Systems
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Sound Systems
Understanding the Tools
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Sound Systems
Loudspeakers
• Specifications• Types
– Horns– Full-range “Box” Enclosures
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Sound Systems
• Types (cont.)
– Steerable Column Loudspeakers
– Line Arrays
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Sound Systems
Mixers
Digital Signal Processing (DSP)
Amplifiers
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Sound Systems
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Speech Intelligibility Prediction
Speech Intelligibility Prediction
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Speech Intelligibility Prediction
3D Computer Modeling
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Speech Intelligibility Prediction
3D Computer Modeling
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Speech Intelligibility Prediction
3D Computer Applications• EASE• Bose Modeler• CATT-Acoustic• Odeon
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Speech Intelligibility Prediction
Results/Calculated metrics:• Direct SPL• STI (Speech Transmission Index) • Total SPL• D/R Ratio• RASTI• Privacy Index• Loudspeaker Overlap
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Speech Intelligibility Prediction
Case Study:
Rodriguez and Quiroga Architects, Homestead City Hall (unbuilt)
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Speech Intelligibility Prediction
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Speech Intelligibility Prediction
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Speech Intelligibility Prediction
Identifying Potential Problem Areas
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Speech Intelligibility Prediction
Creating Solutions
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Speech Intelligibility Prediction
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Intelligibility Measurement
Speech Intelligibility Measurement
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Intelligibility Measurement
Plymouth State Ice Arena, Sasaki Associates
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Questions?
Thank you for your time.
November 10, 2011