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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.
Vinyl microgroove phonograph records typically yield 55-65 dB, though the first play of the higher-fidelity outer rings can achieve a dynamic range of 70 dB. [25] German magnetic tape in 1941 was reported to have had a dynamic range of 60 dB, [26] though modern-day restoration experts of such tapes note 45-50 dB as the observed dynamic range. [27]
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The decibel originates from methods used to quantify signal loss in telegraph and telephone circuits. Until the mid-1920s, the unit for loss was miles of standard cable (MSC). 1 MSC corresponded to the loss of power over one mile (approximately 1.6 km) of standard telephone cable at a frequency of 5000 radians per second (795.8 Hz), and matched closely the smallest attenuation detectable to a ...
Reading the great Elijah Wald book that was a source for your movie (“Dylan Goes Electric!: Seeger, Dylan, and the Night That Split the Sixties”), you get caught up in the different dynamics ...
The commercial use of Movietone began when William Fox of the Fox Film Corporation purchased the entire system, including the patents, in July 1926. Despite Fox owning the Case patents, the work of Freeman Harrison Owens, and the American rights to the German Tri-Ergon patents, the Movietone sound film system utilized only the inventions of Case Research Lab.
Ladies and gentlemen: footage of a critical moment of Saturday Night Live history just dropped.. In the third episode of the documentary series SNL50: Beyond Saturday Night, Dave Grohl discussed ...
BRAAAM is a loud, low sound typically produced using real or synthesized brass instruments.One of the best-known examples also involved a prepared piano.Seth Abramovitch of The Hollywood Reporter described the sound as "like a foghorn on steroids" which is "meant to impart a sense of apocalyptic momentousness". [3]