Acoustic checks on office fit-out drawings before the ceilings go up
TL;DR Reverbline checks office fit-out drawings for noise problems before anything is built. It models how speech and sound travel across the planned floor, marks the zones that will fail, and proposes cheaper fixes in the drawings. Design-and-build firms pay per project, and a handover test proves the result.
India leased a record 82.6 million sq ft of office space in 2025[1], and almost every lease ends in a new fit-out. Most of those floors are open plan, with hard ceilings, glass cabins and a pantry right next to the quiet zone.
Research on open and activity-based offices links them to lower productivity than single offices[2], and one field study found face-to-face interaction fell by about 70% after a move to open space[3]. So much for open plans bringing people together.
The fix usually comes late. Staff complain after move-in, and the tenant then pays for panels, booths and white-noise systems on top of a finished ceiling. India has no published study of office acoustic complaints, which is itself a gap a vendor could fill.
Reverbline works at the design stage, when a change costs a line on a drawing. The fit-out firm uploads the layout, ceiling plan and finishes schedule. Reverbline builds a room-acoustic model of the floor and shows, zone by zone, how far a normal speaking voice carries, where reverberation runs too long and which cabins leak speech into the open area.
It then suggests changes ranked by cost - move the collaboration zone away from focus desks, swap a gypsum ceiling strip for an absorptive one, extend a partition to the slab, or add a screen. The designer accepts or rejects each change, and Reverbline re-runs the model.
At handover, a technician measures the built floor with a calibrated kit and compares it with the prediction. That report is what the tenant's facilities team keeps.
The seed called for AI spatial-audio analysis. Standard acoustic simulation plus a real measurement does the job, so I kept the goal and narrowed the buyer.
The user is the fit-out designer. The payer is the design-and-build firm, which can pass the fee into the project cost or use the report to win bids from occupiers who have been burned before. Large tenants with in-house workplace teams are a second buyer. There's no public price for this service in India, and the closest simulation software publishes no price list[4], so pricing has to be tested.
Occupiers are back in the office. One big consultancy's 2025 survey found 94% prefer at least three office days a week, and 73% plan to use workplace design as a key lever for the office experience[5]. Leasing set a record in 2025[1]. More people on more newly fitted floors means more noise complaints, unless someone checks the plan first.
There is no public figure for India's office acoustic consulting market. The firmest proxy is volume - 82.6 million sq ft leased in 2025, with Bengaluru, Mumbai and Delhi-NCR taking about 61%[1]. If even a small share of those fit-outs bought a design check then you'd have more projects than one team can run.
Indian makers of acoustic partitions and ceilings supply design specs with its products and one says it complements acoustic consultants rather than replacing them[6]. A European software firm sells physics-based acoustic simulation and lists building design as one use[4]. Independent acoustic consultants serve auditoriums and studios more than ordinary office floors. The gap is a fast, priced, per-project check that fit-out firms can buy without hiring a consultant.
| Difficulty | Moderate (35/100) |
| Starting capital | ₹40–75 L |
| Time to launch | 4–6 months |
The modelling tools exist. Speed is the hard part, because a fit-out firm won't wait two weeks for a report and the model has to turn drawings around in two or three days. Trust is the other one. The first handover test that badly misses the prediction will travel fast through a small industry.
No licence is needed to give acoustic design advice in India. Liability comes from your contract, so carry professional indemnity insurance.
Building this outside India? The categories above usually have a local equivalent, so check with your own regulator.
Don't let AI replace the calibrated handover measurement. That test is what the client is paying for.
Want to work out the AI layer for Reverbline? Talk to Yash →
I'd back a founder with acoustics or building-services training who can sell to fit-out firms. A pure software founder will struggle, because the handover measurement is what makes it credible. Prove one thing first - that five fit-out firms will pay for a check on a live project, and that the handover test lands close to the model.
Plan for roughly ₹40–75 L, mostly for acoustic engineers, simulation software and a calibrated measurement kit. Starting with one fit-out firm helps.
No licence is needed for acoustic advice. Carry professional indemnity insurance and register for GST once turnover requires it.
Yes. Check which indoor acoustic guidance local clients expect, since the outdoor noise rules won't cover it.
The free Reverbline validation kit has the line-by-line capital breakdown, the effort scoring, the rules checklist, a 14-day validation sprint with pass/fail targets, a 90-day launch plan, 10 interview questions for fit-out firms and tenants, and 5 assumptions to test. Download the kit →
Thinking about building Reverbline or something close to it? The make-or-break work is getting fit-out firms to put a paid acoustic check into their bids, and I'm glad to work through that with you. If you need a hand, you know where to find me. Talk to Yash →
For illustration only. Names are fictional and ideas hypothetical; sourced facts are real but may be out of date. Nothing here is legal, financial or professional advice, and Yash Khatri is not personally liable for any use of it. Read the full disclaimer.