EU Environmental Noise Directive

Calculate a person's cumulative 24-hour exposure to sound (L_den) using the EU Environmental Noise Directive formula for road, rail, and air traffic noise.

Calculate L_den

Day Exposure L_d (dBA)

Day Hours

Evening Exposure L_e (dBA)

Evening Hours

Night Exposure L_n (dBA)

Night Hours

Note: Evening exposure is penalized by +5 dB, and Night exposure by +10 dB automatically in the formula.

Cumulative Exposure (L_den)

dBA

Permissible Cumulative Exposure (L_den) Values

Area	Day (dBA)	Night (dBA)
Purely industrial	70	70
Predominant commercial and industrial	65	50
Mixed areas	60	45
Predominant residential	55	40
Purely residential	50	35
Hospitals etc.	45	35