Sound Level Tools

Noise mapping / sound level modelling

Create complex sound level models for free in your browser.  Add point sources, barriers, buildings and receiver points with frequency information. See the sound paths and how these are affecting the levels.  Interact with your model, modifying positions and parameters and see the calculation results instantly. 

Learn through exprimentation how the calculations of ISO 9613 parts 1 and 2 are implemented and how they affect predicted levels.  Built into your browser, your model is stored in the location bar making it easy to save and share your interactive models with other people.

Start noise mapping - works in any modern web browser

The tool is still in development and we welcome your feedback

You can also access the tool by visiting

Interactive sound level calculator

A decibel sound level calculator with interactive diagram for combining reduction due to propagation over a distance, insertion of a barrier, ground effect and air absorption using ISO 9613 methods of calculation.
Use the calculator - requires flash

Multiple noise sources calculator

Original noise calculator - up to 3 independent point sources of noise at different distances and durations.
Use the calculator - requires javascript


Mike Stigwood
& Terri Stigwood


01223 441671
or 01223 510430

Business Address

14 South Road,
Cambs, CB24 9PB

Map of areas we cover