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2. Ambient noise level - Wikipedia

   en.wikipedia.org/wiki/Ambient_noise_level

   Ambient noise level is measured with a sound level meter. [4] It is usually measured in dB relative to a reference pressure of 0.00002 Pa, i.e., 20 μPa (micropascals) in SI units. [5] This is because 20 μPa is the faintest sound the human ear can detect. [5] A pascal is a newton per square meter. The centimeter-gram-second system of units ...

3. Noise curve - Wikipedia

   en.wikipedia.org/wiki/Noise_curve

   Noise curves are a common way to characterise background noise in unoccupied buildings and spaces. [1] Their purpose is to produce a single-value representation of a complete sound spectrum. International standards organizations ( ISO , [ 2 ] ANSI [ 3 ] and ASA ) recognize the need to objectify judgements on the amount of ambient noise in ...

4. Noise regulation - Wikipedia

   en.wikipedia.org/wiki/Noise_regulation

   Noise regulation includes statutes or guidelines relating to sound transmission established by national, state or provincial and municipal levels of government. After the watershed passage of the United States Noise Control Act of 1972, [2] other local and state governments passed further regulations.

5. How to Tell if Your Home Is in a Good Neighborhood - AOL

   www.aol.com/tell-home-good-neighborhood...

   1. An Acceptable Noise Level. The amount of ambient noise can have a huge influence on your quality of life in a new home. Make sure you visit a prospective area at different times, and on ...

6. What is the penalty for violating Charlotte’s noise ordinance ...

   www.aol.com/news/penalty-violating-charlotte...

   According to the noise ordinance, acceptable noise levels are: Sunday-Thursday: 8 a.m.-9 p.m. at 85 decibels and 9 p.m.-2 a.m. (the following day) at 60 decibels

7. Sound pressure - Wikipedia

   en.wikipedia.org/wiki/Sound_pressure

   In other media, such as underwater, a reference level of 1 μPa is used. [9] These references are defined in ANSI S1.1-2013. [10] The main instrument for measuring sound levels in the environment is the sound level meter. Most sound level meters provide readings in A, C, and Z-weighted decibels and must meet international standards such as IEC ...