Comfort

Detailed requirement

Part 1: Sound Pressure Level

Each regularly occupied space meets the following sound pressure level as measured when the space and adjacent spaces are unoccupied, but within 1 hour of normal business hours:

• Average sound pressure level from outside noise intrusion does not exceed 50 dBA.

Part 2: Sound Pressure Level in Residences

Each regularly occupied space meets the following sound pressure level when the space and adjacent spaces are unoccupied:

• The sound pressure level from outside noise intrusion is less than or equal to 40 dBA based on the peak hour Leq.

Part 3: Acoustical Narrative

The project team provides a narrative describing:

• The sources of external and internal noise considered in design.
• The strategies undertaken to manage these sources.

Part 4: Sound Pressure Level in Schools

Each regularly occupied space meets the following sound pressure level when the space and adjacent spaces are unoccupied:

• Spaces equal to or less than 6,000 m² [20,000 ft²]: average sound pressure level from outside noise intrusion is less than or equal to 35 dBA.
• Spaces greater than 6,000 m³ [20,000 ft³]: average sound pressure level from outside noise intrusion is less than or equal to 40 dBA.

See detailed requirement for Exterior noise intrusion