To install click the Add extension button. That's it.

The source code for the WIKI 2 extension is being checked by specialists of the Mozilla Foundation, Google, and Apple. You could also do it yourself at any point in time.

4,5
Kelly Slayton
Congratulations on this excellent venture… what a great idea!
Alexander Grigorievskiy
I use WIKI 2 every day and almost forgot how the original Wikipedia looks like.
Live Statistics
English Articles
Improved in 24 Hours
Added in 24 Hours
What we do. Every page goes through several hundred of perfecting techniques; in live mode. Quite the same Wikipedia. Just better.
.
Leo
Newton
Brights
Milds

Day-night average sound level

From Wikipedia, the free encyclopedia

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 10pm and 7am are artificially increased by 10 dB before averaging. This noise is weighted to take into account the decrease in community background noise of 10 dB during this period. There is a similar metric called day-evening-night average sound level (DENL) commonly used in Europe or community noise exposure level (CNEL) used in California legislation; that is, the DNL with the addition of an evening period from 7 PM to 10 PM when noise level measurements are boosted 5 dB to account for the approximate decrease in background community noise by 5 dB during this period.

In the US, the Federal Aviation Administration has established this measure as a community noise exposure metric to aid airport noise analyses under Federal Aviation Regulation Part 150.[1] The FAA says that a maximum day-night average sound level of higher than 65 dB is incompatible with residential communities.[2] Communities in affected areas may be eligible for mitigation such as soundproofing.

YouTube Encyclopedic

  • 1/3
    Views:
    11 479
    835 727
    1 364 190
  • ✪ Calculating Sound Exposure (Sound Dose)
  • ✪ Day at Work: ER Nurse
  • ✪ Learn American Sign Language: Beginner conversational words and phrases in ASL

Transcription

See also

References

  1. ^ Airport Noise Compatibility Planning (14 CFR Part 150). October 19, 2018. Federal Aviation Administration.
  2. ^ "Noise Monitoring". Massport. Archived from the original on 1 February 2014. Retrieved 31 January 2014.
This page was last edited on 2 October 2019, at 10:30
Basis of this page is in Wikipedia. Text is available under the CC BY-SA 3.0 Unported License. Non-text media are available under their specified licenses. Wikipedia® is a registered trademark of the Wikimedia Foundation, Inc. WIKI 2 is an independent company and has no affiliation with Wikimedia Foundation.