European Union Agency for Railways

A-weighted equivalent continuous sound pressure level
LpAeq,T

See ISO Standard formula where LpAeq,T is the A-weighted equivalent continuous sound pressure level in dB; T is the measurement time interval in s; pA(t) is the A-weighted instantaneous sound pressure at running time t in Pa; p0 is the reference sound pressure; p0 = 20 μPa. Note 1 to entry: Adapted from ISO 1996‑1:2003.
Document
ISO
Context
International Standard
Origin document

ISO 3095:2013(en) Acoustics — Railway applications — Measurement of noise emitted by railbound vehicles

Reference Link
https://www.iso.org/obp/ui/en/
Release