On your sound level meter or noise meter, you will often see references to frequency weightings, but what does this mean?
What are A, C & Z Frequency Weightings?
![](https://www.cirrusresearch.co.uk/blog/wp-content/uploads/2020/03/FREQUENCY-BLOG.png)
On your sound level meter or noise meter, you will often see references to frequency weightings, but what does this mean?