Noise Criteria definition

Noise Criteria or “NC” means noise criteria as set out in ASHRAE Applications Handbook, Chapter 48. NC is a single number rating that is sensitive to the relative loudness within a given space at different frequencies;
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Noise Criteria offices: NC-35 Noise criteria: offices adjacent to or below fan rooms, toilets, retail areas: NC-40.
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Examples of Noise Criteria in a sentence

  • Design in accordance with good practice to achieve conventional ambient noise levels qualified in Noise Criteria (NC) defined in current ASHRAE Applications Volume, Chapter 42 and ANSI S1.8 Reference Quantities for Acoustical Levels – ASA 84.

  • As the decision-making body for the Project, the City Council has reviewed and considered the facts and information contained in the Application and supporting documentation against the ALUCP compatibility factors, including [1] Safety Criteria (ALUCP Table 2-2) and Safety Zones (ALUCP Map 2-2), [2] Noise Criteria (ALUCP Table 2-3) and Noise Impact Zones (ALUCP Map 2-3), [3] Airspace protection Zones (ALUCP Map 2-4), and [4] Overflight Notification Zones (ALUCP Map 2-5).

  • Facility Dynamics maintains sound level testing equipment and will provide sound level surveys with octave band data plotted on NC (Noise Criteria) curves.

  • The HVAC systems shall perform to the following Noise Criteria: Executive Offices NC35 Conference Rooms ▇▇▇▇ ▇▇▇▇▇▇▇ ▇▇▇▇▇▇ ▇▇▇▇▇ ▇▇▇▇ Restrooms NC45 Manufacturing NC45 HVAC equipment shall be located next to columns of structural steel system to minimize vibration on occupied floors.

  • The background noise target shall be Noise Criteria (NC) 25-30 with no pure tones.

  • Ambient noise from mechanical equipment shall not exceed Noise Criteria curve (NC) 35 in accordance with the ASHRAE Handbook in offices and conference rooms; NC 40 in corridors, cafeterias, lobbies, and toilets; NC 50 in other spaces.

  • However, the predicted noise level at noise sensitive receivers including the Union Square and the Richwealth Mansion exceeds the Noise Criteria at night time (2300 to 0700 hours) for dredging works to be carried out close to the landfall sites.

  • Doors: Solid core finished doors, complete with frame, trim and hardware, installed on washrooms, stairwells, and electrical, mechanical and telephone rooms, and as specified in the Outline Specification Noise Criteria: Criteria specified in Outline Specification.

  • Uses Noise Criteria (L10(1 hour)), dB(A) Predicted Maximum Noise Levels (L10(1 hour)), dB(A) Place for Worship 65 74 After implementing direct noise mitigation measures, the predicted overall noise levels of some of the NSRs still exceed the noise criteria, which are not directly affected by the Project.

  • The Lessor shall provide a Preferred Noise Criteria (PNC) level of 35 to 45, including noise infiltration through opened windows, if windows that open are provided.