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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 07:00 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.
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The day–evening–night noise level or L den is a 2002 European standard to express noise level over an entire day. It imposes a penalty on sound levels during evening and night [1] and it is primarily used for noise assessments of airports, busy main roads, main railway lines and in cities over 100,000 residents.
Seattle, WA {Section 25.08.501} considers the sound emitted to be in violation if the sound is plainly audible within a dwelling from 10 pm to 7am; the need for a sound level meter is avoided. Chicago, IL {Section 11-4-2805} limits received sound levels to 55 dB(A) inside a residential dwelling unit but if the ambient is greater, the limit is ...
In 2014 Al Jazeera America and producer Reed Lindsay won a Gracie Award in the “Outstanding Hard News Feature” category from the Alliance for Women in Media Foundation for the story “Fists of Fury,” which aired on America Tonight. [5] The award was the first award ever for the channel.
10.2 is the surround sound format developed by THX creator Tomlinson Holman of TMH Labs and the University of Southern California (schools of Cinematic Arts and Engineering). Developed along with Chris Kyriakakis of the USC Viterbi School of Engineering , 10.2 refers to the format's slogan: "Twice as good as 5.1".
The following television stations in the United States brand as channel 2 (though neither using virtual channel 2 nor broadcasting on physical RF channel 2): KALB-DT2 in Alexandria, Louisiana; KMBH-LD in McAllen, Texas; KPSP-CD in Cathedral City, California; KYUU-LD in Boise, Idaho; WBBH-TV in Fort Myers, Florida; WENY-DT3 in Elmira, New York
Some matrix encoding surround sound systems use a single back center channel surround (Dolby Digital EX, Dolby Pro Logic IIx 6.1) or a back left and back right (Dolby Pro Logic IIx 7.1) speaker configuration. Often the standard surround channels are misconceived to be "rear channels" when they are in fact meant to be placed at 90-120 degrees.