Comfort COPY Flashcards
The sound pressure limits of the octave band spectra ranging from 63 Hz to 8000 Hz.
Noise criteria (NC)
An independent, non-governmental international organization that develops consensus-based, market-relevant standards for worldwide use.
International Organization for Standardization (ISO)
The pressure variation associated with sound waves, usually measured in decibels (dB). Also known as acoustic pressure.
Sound pressure level
A laboratory method for determining sound transmission through a wall.
Sound transmission class (STC)
The average value that determines the absorptive properties of materials.
Noise reduction coefficient (NRC)
Desk Height Flexibility of Feature 73 requires that at least ___% of workstations have the ability to alternate between sitting and standing positions.
30
The second part of Feature 83, Radiant Thermal Comfort, requires that at least 50% of the floor area in all offices and other regularly occupied spaces meet the requirements of ___.
ASHRAE Standard 55-2013
Leading source of dissatisfaction with office conditions?
acoustic problems
How many people worldwide have Lower back pain?
7% of population
Total # of days of work missed due to MSDs (musculoskeletal disorders) - back pain, neck pain, osteoarthritis, carpal tunnel etc.
380,600 days makes up 1/3 of total days absent
Thermal comfort - only ___% of buildings met occupant satisfaction
11%
73 - Ergonomics; chair height and seat depth are adjustable and compliant with ____.
30% HFES 100 or BIFMA G1
74 - Exterior Noise Intrusion Within 1 hour of normal business hours sound intrusion does not exceed ___dBA
50 dBA
75 - Internally Generated Noise Accoustic Plan identifies ___ and ___.
loud and quiet zones and noisy equipment
Noise Criteria - max noise from HVAC in spaces: Teleconference rooms___ Conference Rooms___ Enclosed Offices___ Open Offices ____
Noise Criteria - max noise in spaces: Teleconference rooms - 20 NC Conference Rooms - 30 NC Enclosed Offices - 35 NC Open Offices - 40 NC
76 - Thermal Comfort Part 1 Mechanically ventilated projects must meet criteria under ____.
ASHRAE 55-2013
What is Homeothermy?
balancing of heat gain and loss to regulate core temp between 97-100
77 - Olfactory Comfort - Source separation - all restrooms, janitorial closets, kitchens, cafeterias and pantries use these 5 methods to keep odors from migrating:
negative pressurization
interstitial rooms
vestibules
hallways
self-closing doors
- Reverberation time - RT60 is ___. What is it for conference rooms and open office spaces?
the time it takes for sound level to decrease 60 dB
.6 sec
.5 sec
79 - sound masking (white noise) speakers emit low-level background noise so sounds is measured at ____dBA in open workspaces and ___ dBA in enclosed offices
45-48 dBA in open workspaces
40-42 dBA in enclosed offices
80 - Sound Reducing Surfaces (acoustical panels - Ceilings) ____NRC in open workspaces and ___ NRC in enclosed offices
- 9+ NRC on 25% surfaces
- 8+ NRC on 25% surfaces
What is NRC? Is a higher or lower number better?
Noise Reduction Coefficient - measures absorptive properties - the higher the number the better it can absorb sound
81 - Sound Barriers part 1 - wall specs ___ NIC
Enclosed offices: w/ or w/o sound masking
Confernce room:
40 STC with
45 STC without
53 STC
82 - Individual Thermal Comfort (free address) projects over ___ SF allow ___% free address, which provides for __ degree gradient across space
2,150 SF at least 50% free address 5 degrees
