Air borne noise

Air borne noise simulations take into account:

• topography
• building heights
• acoustic emission spectra of rolling stock
• vehicle speed profiles
• drawings of track alignment

Noise levels generated in the environment, are calculated using the environmental noise calculation software IMMI.This software integrates all existing algorithms for environmental noise calculations, including (but not restricted to)NMPB - XP S 31-133, ISO 9613-2, RLS-90, DIN 18005, StL-86, VDI 2571/VDI 2714/VDI 2720, Schall 03, Transrapid, Semibel, CRN, CRTN, SRM II, TemaNord 1996:524 & 525, ÖAL 28, Ö-Norm S5011, RVS 3.02.

 Our scope of works include but are not limited to:

• production of noise maps without considering mitigation measures
• comparison between calculated noise levels and noise criteria
• selection of the mitigation measures if required
• production of noise maps with consideration of the selected mitigation measures.

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