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From page 105... ... 105 This chapter cross-references key tables and figures provided in the guidelines. Application examples are included here to illustrate how problems can be minimized at various steps of the design process. Read the entire page →
From page 106... ... 106 Improving Intelligibility of airport terminal public address Systems 30 seconds to walk the space, for example, there are 30 curves in that ADS plot. For each example in this section, a range of values illustrating the "PA System Target Uniformity" is included. Read the entire page →
From page 107... ... Example 1 Design Overcomes Very Challenging Conditions to Achieve STI 0.49 Description: Large Concessions Space Year commissioned: 2005 (Upgrade to digital system in 2015) TechnicAl DATA Daytime ambient noise level 64 dBA Leq Announcement SPL 72 dBA Leq Nighttime ambient noise level 59 dBA Leq STI range 0.46 to 0.49 Uniformity ± 4 dBA Reverberation time (RT60) Read the entire page →
From page 108... ... 108 Improving Intelligibility of airport terminal public address Systems (a) Large concessions space. Read the entire page →
From page 109... ... Decision tools and examples 109 Example 2 High-Performance Ceiling Treatment Provides STI 0.65 in High Ceiling Space Description: Concessions, Food Court Year commissioned: 2011 TechnicAl DATA Daytime ambient noise level 62 dBA Leq Announcement SPL 73 dBA Leq Nighttime ambient noise level 52 dBA Leq STI range 0.62 to 0.69 Uniformity ± 1 dBA Reverberation time (RT60) 1.1 sec at 500 Hz 1.1 sec at 2,000 Hz ArchiTecTurAl/AcouSTicAl DeTAilS Ceiling height 30–38 feet Finishes Terrazzo floor, acoustical ceiling tile, gypsum board interior finishes PA SySTem DeTAilS PA system type Digital Paging microphone type Omnidirectional push talk Loudspeaker type Ceiling-mounted loudspeakers Loudspeaker spacing 28–36 feet (ceiling-mounted loudspeaker spacing) Read the entire page →
From page 110... ... (a) Concessions area. Read the entire page →
From page 111... ... Decision tools and examples 111 Example 3 Average Performing ADS with Room for Improvement Achieves STC 0.49 Description: Ticketing Year commissioned: 2011 TechnicAl DATA Daytime ambient noise level 62 dBA Leq Announcement SPL 70 dBA Leq Nighttime ambient noise level 52 dBA Leq STI range 0.47–0.52 Uniformity ± 1 dBA Reverberation Time (RT60) 1.0 sec at 500 Hz 0.9 sec at 2,000 Hz ArchiTecTurAl/AcouSTicAl DeTAilS Ceiling height 18–20 feet Finishes Carpeting in cue area, terrazzo floor adjacent; angled ceiling of microperforated metal panel with faux wood finish; glass exterior wall; gypsum board and metal panel interior; and ventilation diffusor walls. Read the entire page →
From page 112... ... (a) Ticketing area. Read the entire page →
From page 113... ... Decision tools and examples 113 Example 4 Low-Ceiling Space Underperforms at STI 0.32 Description: Baggage claim area Year commissioned: unavailable TechnicAl DATA Daytime ambient noise level 62 dBA Leq Announcement SPL 70 dBA Leq Nighttime ambient noise level 62 dBA Leq STI range 0.32 Uniformity ± 1 dBA Reverberation Time (RT60) 2.9 sec at 500 Hz 2.8 sec at 2,000 Hz ArchiTecTurAl/AcouSTicAl DeTAilS Ceiling height 8–13 feet Finishes Arched plaster ceiling, terrazzo floor. Read the entire page →
From page 114... ... (a) Baggage claim area. Read the entire page →
From page 115... ... Decision tools and examples 115 Example 5 Quiet Ambient and Basic Good Design Achieves STI 0.73 (dry) Read the entire page →
From page 116... ... Photo credit: Wilson Ihrig (a) Baggage claim. Read the entire page →
From page 117... ... Decision tools and examples 117 Example 6 Challenging Conditions for Large Space Achieves STI 0.56 Description: Large concessions space Year commissioned: 1953/1998 TechnicAl DATA Daytime ambient noise level 68 dBA Leq Announcement SPL 69 dBA Leq Nighttime ambient noise level 64 dBA Leq STI range 0.61 (low ceiling area at counters) 0.51 (high ceiling area at tables) Read the entire page →
From page 118... ... (a) Concessions area. Read the entire page →
From page 119... ... Decision tools and examples 119 Example 7 Moderately Challenging Space With Room for Improvement, STI 0.46 Description: TSA Screening Area Year commissioned: 2009 TechnicAl DATA Daytime ambient noise level 58–60 dBA Leq Announcement SPL 63 dBA Leq Nighttime ambient noise level 51 dBA Leq STI range 0.46 Uniformity ± 2 dBA Reverberation Time (RT60) 1.3 sec at 500 Hz 1.2 sec at 2,000 Hz ArchiTecTurAl/AcouSTicAl DeTAilS Ceiling height 28 feet Finishes Carpeted floor; hard panel ceiling; gypsum walls with large glass doors on one end. Read the entire page →
From page 120... ... (a) Small TSA screening area. Read the entire page →
From page 121... ... Decision tools and examples 121 Example 8 Highly Challenging Space With Room for Improvement, STI 0.36 Description: Lower Level of Gate Area Year commissioned: 2000 TechnicAl DATA Daytime ambient noise level 64–69 dBA Leq Announcement SPL 74 dBA Leq Nighttime ambient noise level 58 dBA Leq STI range 0.29–0.39 Uniformity ± 1 dBA Reverberation Time (RT60) 2.9 sec at 500 Hz 3.5 sec at 2,000 Hz ArchiTecTurAl/AcouSTicAl DeTAilS Ceiling height 31 to 42.5 feet Finishes Terrazzo floor, gypsum board, partial coverage with perforated metal ceiling tiles. Read the entire page →
From page 122... ... (a) Lower level gate area. Read the entire page →
From page 123... ... Decision tools and examples 123 Example 9 Satisfactory Ticketing Area, STI 0.61 Description: Ticketing near TSA Year commissioned: 2004/2008 TechnicAl DATA Daytime ambient noise level 63 dBA Leq Announcement SPL 67 dBA Leq Nighttime ambient noise level 51 dBA Leq STI range 0.55–0.64 Uniformity ± 2 dBA Reverberation Time (RT60) 0.9 sec at 500 Hz 1.0 sec at 2,000 Hz ArchiTecTurAl/AcouSTicAl DeTAilS Ceiling height 24 feet Finishes Terrazzo floor, suspended slat ceiling, glass exterior wall, gypsum board interior walls with acoustically reflective wood panels above ticketing counter and acoustical tile above ticketing agents. Read the entire page →
From page 124... ... (a) Ticketing area. Read the entire page →

From page 105...

... 105 This chapter cross-references key tables and figures provided in the guidelines. Application examples are included here to illustrate how problems can be minimized at various steps of the design process.