Free-Field Sound Distance Change

How to use this tool

1. Estimate level change as listening distance changes from a reference point.
2. Set reference sound level, reference distance, new distance in the indicated units.
3. Calculate and compare predicted level, level change.

Try this example

{
  "level": 90,
  "r1": 1,
  "r2": 2
}

Accuracy and scope

Point source in a free field. Walls, atmospheric absorption, arrays and near-field behavior are excluded.

Is my data uploaded?

This tool runs locally in your browser. Input and output are not sent to a processing server. Copy or download your result before leaving the page.