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9 lut 2023 · A description of the various background noise criteria for buildings and rooms, including a table of acceptable noise levels for a number of space types.
13 wrz 2022 · Locate teaming spaces and open office environments away from reception areas and other high traffic areas not associated with these spaces. Specify acoustical ceilings with a noise reduction coefficient (NRC) of 0.75.
External sound sources covered by the guidelines include the following, typically time-varying sources: • Road traffic • Underground, overground railways and light rail systems
Acceptable noise - <i>dB<sub>A</sub></i> - level at typical common locations.
1202.1 General. Buildings shall be provided with natural ventilation in accordance with Section 1202.5, or mechanical ventilation in accordance with the International Mechanical Code.
Noise Criterion - NC - level is a standard uesd to describe the relative loudness of a space within a range of frequencies. Noise Criterion - NC - were established in the U.S. to rate indoor noise like noise from air-conditioning equipment and similar. In Europe it is common to use the alternative Noise Rating Curve - NR.
band sound levels below 250 Hz be greater than the criteria a potential “rumble” problem is indicated. As a check on the relative rumble potential, the following procedure is recommended: • Sum the sound pressure levels in the octave bands from 31.5 through 250 Hz on an energy basis.
