Ln - Strategic Noise Maps of Large Railway Axes of the Valencian Community - 4th phase

Ln of the strategic noise maps of large railway axes of the Valencian Community - 4th phase. Ln or Lnoche is defined as the night noise index, which is the noise index corresponding to sleep disturbance, expressed in decibels (dB) and defined as the A-weighted long-term average sound level defined in ISO 1996-2: 1987, determined throughout all night periods of a year, according to Royal Decree 1513/2005 of BOE 301 of 17/12/2005. Large railway axes, are those that have a number of circulations greater than 30,000 trains / year