Before you sign: what the acoustic guarantee actually promises
A turnkey acoustic contract is usually the largest single decision in a noise project, and it is normally signed on commercial terms rather than acoustic ones. That is not a criticism — nobody expects a procurement officer to know the difference between 10 dB and 10 dB(A). But that difference decides whether the work you pay for solves your problem.
What goes wrong in acoustic contracts
- A guarantee stated in decibels without naming the frequency, the weighting, the receptor position or the standard
- A performance figure lifted from the material's laboratory test certificate, rather than a prediction for your building
- No obligation to measure anything after completion, so nothing is ever verified
- Acceptance criteria written by the party being accepted
- Flanking transmission excluded — usually the path that decides the outcome
- No named measurement standard, so almost any method can later be claimed as compliant
What the review gives you
- We read the quotation, the specification and the guarantee wording
- We tell you in plain language what has actually been promised, and what has not
- We rewrite the acoustic clauses so the promise is measurable: the quantity, the weighting, the position, the standard, and who verifies it
- We define an acceptance test a third party can carry out
- Where it applies, we tell you which parts of the scope you probably do not need
Why this is inexpensive
A day of engineering against a commitment that usually runs to seven figures. And if the review finds the contract is sound, you have bought certainty for the price of a day.
We are not trying to replace your supplier
We sell no materials and no installation, and we have no interest in who wins the work. A turnkey supplier with a well-written contract is a perfectly good outcome. The problem is never the supplier — it is a promise nobody can measure.
Standards & method
ISO 16283 · ISO 1996 · ISO 9613-2 · ISO 3382 · IEC 61672-1 · relevant Thai notifications
FAQ
We already have a quotation. Is it too late?
No. Before signature is ideal, before payment is still useful.
Can you review a contract that is already signed?
Yes, although your options narrow. This is often where disputes begin, and it is the point at which we are usually called.
Do you deal with the supplier directly?
Only if you want us to. Most clients prefer to use our wording as their own.
What do you need from us?
The quotation, any specification or drawings, and a clear statement of what you actually need to achieve.