Day-evening-night level. It is a descriptor of noise level based on energy equivalent noise level (Leq) over a whole day with a penalty of 10 dB(A) for night time noise (23.00-7.00) and an additional penalty of 5 dB(A) for evening noise (i.e. 19.00-23.00).
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Day–evening–night noise level
The day–evening–night noise level or Lden is a 2002 European standard to express noise level over an entire day. It imposes a penalty on sound levels during evening and night and it is primarily used for noise assessments of airports, busy main... Wikipedia
The day–evening–night noise level or Lden is a 2002 European standard to express noise level over an entire day.
The day-night average sound level (Ldn or DNL) is the average noise level over a 24-hour period. The noise level measurements between the hours of 22:00 and ...
The Lden (Day Evening Night Sound Level) or CNEL (Community Noise Equivalent Level) is the average sound level over a 24 hour period, with a penalty of 5 dB ...
Day-Night Sound Level - L ... is the A-weighted equivalent sound level for a 24 hour period with an additional 10 dB imposed on the equivalent sound levels for ...
Exterior noise levels – Proposed HUD-assisted projects with a day-night average sound level of below 65 decibels are acceptable (see Standards in 24 CFR Part ...
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Research problem. The long-term day–evening–night noise level L den is a logarithmic weighted mean of the day noise level L d , evening noise level L e and ...
Lden is calculated using Lday, Levening and Lnight, however, to take into account the annoyance induced by the noise during the sleeping and the evening periods ...
Lday Levening and Lnight are the A-weighted long-term average sound level as defined in ISO 1996- 2:1987, determined over all the day, evening and night ...