Acoustic Design and Assessment for Offices and Institutions in Montreal
Offices, schools, clinics, and libraries depend on the quality of their acoustic environment, which allows conversations to stay private, meetings to be intelligible, and occupants to concentrate. These qualities are the result of design decisions on room layout, finishes, partitions, and mechanical systems, made before construction. An acoustic design sets the performance each room requires and specifies the construction that will achieve it. Where the acoustic conditions of an existing space fall short, an acoustic assessment identifies the cause and the correction.
Acoustic performance also counts toward building certification. LEED and WELL are voluntary rating systems that recognize buildings designed for environmental performance and occupant health; owners pursue them to attract tenants and to demonstrate the quality of the building. Both award points for acoustics: LEED for background noise, sound insulation, and reverberation; WELL for an acoustic plan at the design stage and verification of the completed space.
Acoustic Quality in Offices and Institutional Buildings
Acoustic quality is defined by four properties of a room: how far speech carries across an open area, how long sound persists in the room, the background noise from building systems, and the sound insulation between rooms. Professional standards set target values for each property by type of space, and each property is determined by specific design choices. In existing spaces, problems arise in the same four properties, and occupants describe the failures in recognizable ways.
| What occupants report | Physical cause |
|---|---|
| Conversations carry across the open plan; hard to concentrate | Speech propagates too far: too little absorption, low partitions, or a background too quiet to mask speech |
| Meeting rooms echo; remote participants cannot follow | Reverberation from hard, reflective surfaces |
| Ventilation hums; meetings held with the system off | Mechanical background noise from diffusers, ducts, or rooftop equipment |
| Conversations heard from the corridor or the next room | Sound transmission between rooms: partitions stopping at the ceiling, undercut doors, shared plenums, duct crosstalk |
Acoustic Assessment and Design for Offices and Institutions
For a new fit-out or institutional building, the design typically includes:
- Acoustic criteria — a criteria sheet per room type, agreed with the architect and the owner at concept stage
- Construction specifications — partition, door, glazing, and ceiling performance, with the details that determine the result in the field, and the noise criteria handed to the mechanical engineer
- Verification — measurements at occupancy, compared with the criteria sheet
For an existing space, the assessment typically includes the following work:
- Occupant survey and walk-through — Sonvera requests the floor plans and the mechanical drawings, and reviews the complaints with the facility contact room by room
- Measurements — background noise, reverberation time, sound insulation between rooms, and speech propagation across open areas are measured as the complaints dictate, and each complaint is attributed to its physical cause
- Corrective measures — Sonvera identifies the most appropriate measures, from changes in layout and equipment settings to ceiling absorption, sound masking, partition upgrades, and duct silencing, selected for what can realistically be implemented in the occupied building, with the expected gain of each
The result is a report that tells the owner or the design team what the space needs, what each measure will achieve, and in what order to proceed.
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