6 SOUND Flashcards
SOUND CONCEPT AIM
- to bolster occupant health and well-being
through the identification and mitigation of acoustical comfort parameters that shape
occupant experiences in the built environment.
-to provide a
comprehensive and holistic approach
to addressing the concerns of acoustical comfort through research-based design considerations
that buildings can accommodate for the purposes of improving occupant health and well-being
Health issues of external noise
3+1
exterior noise from transportation or industrial sources: sleep disturbance, hypertension and the reduction of mental arithmetic skills
risk for myocardial infarction - night road traffic men/air traffic women
Health issues of internally generated noise +sources
5
Dissatisfaction
HVAC- hinder productivity, focus, memory retention and mental arithmetic
create stress and disrupt performance on more complex cognitive tasks (e.g., the memory of prose, mental arithmetic)
Lack of privacy
Inappropriate reverberation times and background noise levels in a space can impede speech intelligibility and cause strain
How many and which preconditions?
1 Sound Mapping
Incorporate strategic planning required to prevent issues of acoustic disturbance from various sources of noise.
P S01 Sound Mapping
2 parts
Part 1
Label Acoustic Zones
Part 2
Provide Acoustic Design Plan
P S01 Sound Mapping
Part 1
Label Acoustic Zones
TD
- An annotated document is submitted and made available to occupants showing labeled zones throughout the project floor plan or similar schematic document as follows:Loud zones: includes areas intended for loud equipment or activities (e.g., mechanical rooms, kitchens, fitness rooms, social spaces, recreational rooms, music rooms)Quiet zones: includes areas intended for concentration, wellness, rest, study and/or privacy (e.g., restorative spaces, lactation rooms, nap rooms).Mixed zones: includes areas intended for learning, collaboration and/or presentation (e.g., auditoriums, classrooms, breakout spaces).Circulation zones: includes occupiable areas not intended for regular occupancy (e.g., hallways, egress, atria, stairs, lobbies).
- If Loud zones directly border Quiet zones, projects provide a plan for reprogramming or mitigating sound transmission between Loud zones and Quiet zones.
P S01 Sound Mapping
Part 2
Provide Acoustic Design Plan
A plan developed by the project team and/or project owner
OR
A detailed report from a professional in acoustics (conditions/solutions/measure) that outlines acoustical solutions and a timeline for implementation with a focus on (5)
PN
managing acoustical comfort, background noise, speech privacy, reverberation time and/or impact noise within the project boundary.
A detailed report from a professional in acoustics that describes existing conditions,
recommended solutions and
measurement results with a focus on managing background noise, speech privacy, reverberation time and/or impact noise within the project boundary. These measurements are not required to adhere to the Performance Verification Guidebook requirements for on-site testing.
How many and which optimizations
5
Feature S02
Maximum Noise Levels
Feature S03
Sound Barriers
Feature S04
Reverberation Time
Feature S05
Sound Reducing Surfaces
Feature S06
Minimum Background Sound
How many and which Beta features
3
Feature S07 Optimization
β Impact Noise Management
Feature S08 Optimization
β Enhanced Audio Devices
Feature S09 Optimization
β Hearing Health Conservation
Feature S02 Maximum Noise Levels
Achieve desired ambient noise levels such that HVAC, exterior noise intrusion or other noise sources do not impact occupant health and well-being.
1 part
measurement & tresholds
PT
Part 1 Limit Background Noise Levels
Background noise levels are measured over a period of five minutes and average sound pressure levels do not exceed the following thresholds, as applicable:
Note: Tier-1 pts/3pts
Category 1 Areas for conferencing, learning or speaking Average SPL (Leq) dBA 40 (35) Max SPL (LMax) dBA 50 (45) dBC +20
Category 2 Enclosed areas for concentration Average SPL (Leq) dBA 45 (40) Max SPL (LMax) dBA 55 (50) dBC +20
Category 3
Open areas for concentration, areas with regularly used PA systems, and areas for dining
core: lobbies, hallways and corridors within non-leased spaces
Average SPL (Leq) dBA 50 (45)
Max SPL (LMax) dBA 60 (55)
dBC +20
Category 4 Areas with machinery and appliances used by occupants (e.g., baggage handling areas, security, commercial kitchens, labs where spoken lectures do not take place) Average SPL (Leq) dBA 55 (50) Max SPL (LMax) dBA 65 (60) dBC +20
Feature S02 Maximum Noise Levels
Part 1
Limit Background Noise Levels (Max: 3 points)
For Dwelling Units
PT
Average background noise levels in bedrooms, when measured over a 12-hour minimum time period (which must include the hours of 10 pm to 7 am), do not exceed 35 dBA (Leq).
dBA
Leq
Noise level is measured in decibels (dB). A-weighted sound levels) . Il livello sonoro
Equivalent Continuous Level.
Sound exposure over an elapsed period of time.
dbA vs dbC sound level meter
The dBA sound level meter applies to the mid-range frequencies as opposed to the dBC sound level meter that measures low and high frequencies/ decibels relative to the carrier
Sound pressure level (SPL)
is the pressure level of a sound, measured in decibels (dB)
acoustic pressure level
Feature S03 Optimization
Sound Barriers
Increase the level of sound isolation and speech privacy between enclosed spaces.
2 parts
Part 1
Design for Sound Isolation at Walls and Doors (1 point)
Part 2
Achieve Sound Isolation at Walls (2 points)