ASTM E492 — Laboratory measurement of impact sound transmission through floor-ceiling assemblies using the tapping machine
The ASTM route to IIC.
At a glance
- Standard
- ASTM E492
- Published by
- ASTM International
- Title
- Laboratory measurement of impact sound transmission through floor-ceiling assemblies using the tapping machine
- Status at ALT
- Traceable — outside the accredited scope
Accreditation status
This standard sits outside ALT’s accredited scope. The measurement is made to the method with traceable reference equipment, and the report says so plainly — it does not carry the accreditation mark. If your specification, regulator or customer requires an accredited result, tell us before you book and we will say whether we can meet it.
Before you commit to this standard
Two things decide whether a result to this standard will be accepted: whether the measurement was made by a laboratory whose scope covers it, and whether the specimen and conditions matched what the standard actually requires. A number produced outside either of those is not wrong, but it is not evidence either.
If you are not certain which standard your specification calls for — and specifications frequently name a superseded edition, or name an ISO standard where the ASTM equivalent is what the market expects — send us the clause and we will tell you what it means in practice before you spend anything.
Standards usually specified alongside it
| Standard | What ALT does with it | Status |
|---|---|---|
| ISO 10140-3 Laboratory measurement of sound insulation of building elements — Impact sound insulation | Impact sound performance of floor coverings and floating floors, rated Ln,w or ΔLw. | Traceable — not in accredited scope |