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  2. Noise pollution - Wikipedia

    en.wikipedia.org/wiki/Noise_pollution

    The L90 is the sound level that exceeds 90% of the time period; this is commonly referred to as background noise. [12] Researchers with the US National Park Service found that human activity doubles the background-noise levels in 63 percent of protected spaces like national parks, and increases them tenfold in 21 percent.

  3. Noise generator - Wikipedia

    en.wikipedia.org/wiki/Noise_generator

    Zener diode based noise source. A noise generator is a circuit that produces electrical noise (i.e., a random signal). Noise generators are used to test signals for measuring noise figure, frequency response, and other parameters. Noise generators are also used for generating random numbers. [1]

  4. New York City Office of Technology and Innovation - Wikipedia

    en.wikipedia.org/wiki/New_York_City_Office_of...

    Outside of New York City, NYC's 311 service can be accessed by calling (212) NEW-YORK (212-639-9675) (dialing 3-1-1 outside of New York City may contact the local municipality's 311 service). There is also a website and a mobile app to access the 311 service. [12] Between 2003 and 2006 NYC311 received more than 30 million calls.

  5. List of New York City manhole cover abbreviations - Wikipedia

    en.wikipedia.org/wiki/List_of_New_York_City...

    NY&NJTCo. = New York & New Jersey Telephone Company; NY&QEL&PCo = New York & Queens Electric Light & Power Company; NYCTA = New York City Transit Authority; NYCTS = New York City Transit System; NYC & HRRR = New York Central & Hudson River Railroad; NYM = New York Municipal Railway Corporation; NYRT = New York Rapid Transit Corporation

  6. New York City Administrative Code - Wikipedia

    en.wikipedia.org/wiki/New_York_City...

    The Administrative Code of the City of New York contains the codified local laws of New York City as enacted by the New York City Council and Mayor. [1] As of February 2023, it contains 37 titles, numbered 1 through 16, 16-A, 16-B, 17 through 20, 20-A, 21, 21-A, and 22 through 33. [2]

  7. NYC Council bill would double fines for excessive noise ... - AOL

    www.aol.com/news/nyc-council-bill-double-fines...

    The new legislation, which is sponsored by Councilman Eric Bottcher (D-Manhattan) would double fines for such violations, potentially raising the penalties from a maximum fine of $3,000 to $6,000.

  8. Civil defense siren - Wikipedia

    en.wikipedia.org/wiki/Civil_defense_siren

    A non-audible test was performed every day, and the last test occurred on 4 October 2018. [31] Afterwards, the network was decommissioned. The sirens remain around nuclear facilities, but no tests are performed. [32] The official recommendation is that people subscribe to BE-Alert, [33] a system where information is provided via SMS, e-mail or ...

  9. Atmospheric noise - Wikipedia

    en.wikipedia.org/wiki/Atmospheric_noise

    Atmospheric noise is radio noise, or "static", caused by natural atmospheric processes, primarily lightning discharges in thunderstorms. On a worldwide scale, there are about 40 lightning flashes per second, or ≈ 3.5 million lightning discharges per day.