> For the complete documentation index, see [llms.txt](https://plugins.audacityteam.org/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://plugins.audacityteam.org/additional-resources/eq-curves/weighted-curves.md).

# Weighted curves

## A-weighted curve

A-weighting is a commonly used curve defined in the International standard IEC 61672:2003. It was originally developed for measuring low level noise in audio equipment.

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