Evidence Domain

Acoustics

What it studies

Sound in built environments: levels, reverberation, transmission, speech intelligibility and privacy. Workplace acoustics centres on a specific problem — intelligible speech as the dominant disruptor of knowledge work — and its measurement, prediction and control.

Why it matters

Acoustic dissatisfaction is the most consistent complaint in open workplace research, and its cognitive mechanism is well established: intelligible irrelevant speech disrupts verbal working memory. Acoustics is where the focus-provision evidence chain becomes physics — speech privacy classes, absorption strategies, sound masking — and where value engineering does its most measurable damage.

Questions it answers
  • What acoustic performance does each setting class require, in measurable terms?
  • Why is speech privacy, not sound level, the critical metric for focus settings?
  • Which treatments actually deliver which acoustic outcomes?
  • How is acoustic performance verified at handover?
Evidence sources
  • Room acoustics standards (ISO 3382-3 for open plan, speech privacy metrics)
  • The irrelevant-speech-effect literature
  • Field measurement and commissioning data
  • Post-occupancy acoustic satisfaction research
Design and policy implications

Setting requirement profiles carrying acoustic classes with verification methods; the absorb-block-cover toolkit applied per setting purpose; enclosure specified for speech privacy where focus and confidentiality demand it; acoustic commissioning at handover as contractual verification.

Related methods
Common misuse

Treating acoustics as a finishes problem — carpet and ceiling tiles — while ignoring speech transmission paths, or specifying 'quiet zones' with no acoustic specification at all. The avoided quiet floor is the discipline's recurring monument to unspecified intentions.

Further research

Sound masking effectiveness across contexts, and the acoustics of hybrid work (video-call sound as the new dominant disruptor) are the live edges of the field.