Online Loudness Meter – by Youlean
Professional loudness meter on palm of your hand.
Does this online meter transfer data to the server?
No, all audio data is being used locally.
What standard does this meter uses?
It uses ITU-R BS.1770-4 standard.
How accurate is this meter compared to other professional SPL meters?
Analyzing from microphone will not give you accurate SPL-Loudness values since it is limited to the hardware on which is being used. If you want to know exact SPL-Loudness level please use professional hardware made for that use. However, if you want to compare perceived loudness of two different sounds this meter will do a great job.
Analyzing from file will give you accurate results comparable to results from other professional analyzers.