AcoustaPLOT Echo

A university seminar room taken from 0.95s to 0.58s, matching BB93's classroom target by analogy -- with one wall left untouched.

An illustrative worked example: a 7.5 x 6 x 3m seminar room (135m3) at 0.95 seconds reverberation, checked against BB93 Table 6's 0.6-second primary new-build limit by analogy (a university room, not a school, so treated as a reference point rather than a direct requirement).

A full-height glass corridor wall was untouchable (fire strategy and listed-building constraints), so the fix concentrated on the other three surfaces: about 38m2 of ceiling rafts, 22m2 of fabric wall panels opposite the glass, and 45m2 of full carpet tiling. Result: 0.58 seconds -- inside the reference target despite the one wall left untreated.

A listed Georgian hotel lobby and bar brought from 1.4s to 0.8s reverberation -- with every fix freestanding, since the stone and marble were protected.

An illustrative worked example: a 12 x 9 x 4.5m combined lobby/bar (486m3) in a converted, listed Georgian townhouse -- stone, marble, plaster ceiling and sash windows, all hard surfaces, at 1.4 seconds reverberation with no statutory limit (target set by guest experience, roughly 0.7-0.9s).

Listed status ruled out wall panels entirely, so every treatment was freestanding or removable: 22m2 of lined sash-window drapes, banquette seating for 14, and a 30m2 wool rug (the entrance marble left untouched). Result: 0.8 seconds.

A community hall's reverberation cut from 1.3s to 0.85s using nothing but curtains, a carpet runner and seat pads -- fittable by volunteers from a stepladder.

An illustrative worked example: a 16 x 10 x 6.5m single-storey community hall (1,040m3) -- brick walls, parquet floor, exposed roof trusses -- at 1.3 seconds reverberation against a brief-set target of 0.8-0.9s.

No budget for scaffolding or a contractor lift meant every fix had to be installable by volunteers from a stepladder, ruling out wall panels. Treated with 18m2 of curtains at the tall side windows, a 24m2 carpet runner down the central aisle, and seat pads on 60 stacking chairs. Result: 0.85 seconds.

An open-kitchen restaurant taken from roughly 4.3s to about 0.8s reverberation, with the open kitchen pass and street-facing glazing both left completely untouched.

An illustrative worked example: a 16 x 8 x 3.8m open-kitchen dining room (486m3) -- polished concrete, painted brick, exposed steel trusses, full-height street glazing -- at roughly 4.3 seconds against a comfort target of 0.8s or below (no statutory regulation applies).

The open kitchen pass couldn't be covered and the street glazing ruled out curtains, so the fix used about 82m2 of suspended ceiling baffles (roughly two-thirds of the ceiling) positioned clear of the pass, banquette seating for 22, and 14m2 of felt wall panels on the one wall without glazing or kitchen frontage. Result: about 0.8 seconds.

A GP waiting room's reception-privacy problem solved within strict infection-control rules -- no fabric screen allowed anywhere near the desk.

An illustrative worked example: an 11 x 6 x 2.6m GP reception and waiting area (about 172m3) at 0.75 seconds reverberation, where reception conversations were carrying across the whole room.

The practice's infection-control policy ruled out any soft, uncleanable fabric surface below 1.2 metres -- eliminating the obvious floor-standing screen fix. Treated instead with about 66m2 of wipeable Class-A ceiling tiles (a straight grid swap), a 4m2 suspended acoustic screen above the counter, and curtains mounted above seating height. Result: 0.75s down to 0.45s, and reception conversations no longer audible past the first row.

A minimalist fashion boutique fixed from 1.15s to 0.75s without a single surface that reads as an acoustic panel.

An illustrative worked example: an 18 x 10 x 4m boutique sales floor (720m3) -- polished concrete, painted brick, a full-height mirror wall -- at 1.15 seconds reverberation, causing till-point speech-clarity problems.

The brief ruled out the mirror wall and anything that looked like a conventional acoustic panel. Treated with framed fabric panels disguised as artwork (about 16m2, Class-A absorptive), an 18m2 wool rug in the fitting-room seating area, and ceiling baffles tucked into the existing exposed services (about 8m2). Result: 0.75 seconds, target range 0.7-0.8s.

A leased co-working floor fixed entirely with freestanding treatment, since the lease required the shell returned bare at the end of the term.

An illustrative worked example: a 19 x 14 x 3.4m open-plan co-working floor (904m3) in a converted warehouse -- polished concrete, exposed brick and services -- at 0.95 seconds reverberation, causing call-clarity and concentration complaints.

The head lease's dilapidations clause required the floor returned to bare shell, ruling out any fixed ceiling or drilled panel. Treated with freestanding acoustic screens between desk clusters (about 45m2 of screen face, also solving a visual-privacy complaint), a modular rug system across the floor (about 140m2, no gluing), and three freestanding acoustic phone booths. Result: 0.6 seconds, every component liftable at lease end.

A Quaker meeting house's weekday hire room fixed with treatment that packs away entirely for Sunday worship.

An illustrative worked example: a 9 x 9 x 4.2m meeting room (about 340m3) with a reverberation time of roughly 1.4 seconds -- fine for silent worship, but hard to hear across for the weekday hire bookings (antenatal classes, a bereavement support group) the building's upkeep depends on.

No statutory target applied; the brief set 0.8-0.9s from the hire use itself. Treated entirely reversibly to protect the worship character: 40 stored chair pads brought out only for weekday use, and one small fixed felt panel (about 4m2) behind the usual facilitator's seat. Result: about 0.85 seconds with the treatment deployed, back to the untreated 1.4s for worship when it's put away.

A spin studio's instructor-cueing problem fixed while keeping every inch of the brand's exposed steel-and-concrete look visible.

An illustrative worked example: a 12 x 9 x 5m spin studio (540m3) in a converted warehouse -- painted concrete block, polished concrete floor, exposed steel-deck ceiling -- at 1.6 seconds reverberation, a safety-relevant problem since instructor cueing was getting lost during fast classes.

The brand's exposed steel-and-concrete look across every studio location couldn't be covered, ruling out a solid suspended ceiling. Treated with suspended vertical baffles below the steel deck (about 60m2 equivalent absorption, deck still visible), backlit branded wall panels at head height (about 20m2), and a full-height curtain across the entrance lobby glazing. Result: 0.9 seconds -- roughly half the starting figure.

A dental practice reception fixed for two complaints at once -- overheard treatment costs, and constant repeat-backs on card payments.

An illustrative worked example: a 6 x 4.5 x 2.9m combined dental reception and waiting area (about 78m3) -- plasterboard walls and ceiling, ceramic tile floor -- at 0.8 seconds reverberation, where a patient had overheard another patient's treatment cost from across the room.

Non-negotiable shopfront glazing limited what curtains could contribute. Treated with a low glazed screen with an acoustic core at one desk position (angled to break the direct sightline), about 27m2 of acoustic ceiling tiles, and about 6m2 of wall paneling along the seating run. Result: 0.5 seconds -- the overheard-conversation complaint resolved directly, and card-payment repeat-backs dropped within the first week.