What are LN Statistics?
Ln Statistics are a way of describing how noise levels vary over time.
What do L10, L50, and L90 actually mean? Ln Statistics are a way of describing how noise levels vary over time.
The “n” stands for the percentage of time a certain level is exceeded. So, L10 means the sound level that was exceeded for 10% of the measurement period, while L90 shows what was exceeded for 90%, often used as an indicator of background noise. These values are incredibly useful in environmental noise surveys, construction site monitoring, and any application where understanding noise variability is key.
- L10: captures short bursts or peaks (e.g. passing traffic)
- L50: gives the median noise level
- L90: reflects consistent background sound
In this video, we break down what each of these Ln values tells you, why they matter, and how they’re applied in real-world acoustic assessments.
Want to learn more about sound measurement terms? Visit the AcSoft Knowledge Hub, full of FAQs, how-tos, and practical insight into noise and vibration monitoring.
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