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June 2020 Version 1. 0 MEASUREMENT OF SOUND LEVELS IN BUILDINGS ANC . . . Foreword Introduction These guidelines cover the measurement of sound pressure levels in buildings from all sources; they supersede both Part 1[1] and Part 2[2] of the ANC Guidelines for measuring noise in buildings, which are withdrawn Since the ANC guidelines were first written in 1997 and 1998, International Standards and other guidance have been published that cover measurement of sound
Noise - GOV. UK Above this level the noise causes a material change in behaviour such as keeping windows closed for most of the time or avoiding certain activities during periods when the noise is present
CCOHS: Noise - Measurement of Workplace Noise Why measure noise in the workplace? Measuring noise levels and workers' noise exposures is the most important part of a workplace hearing conservation and noise control program
NR - the Noise Rating Curve - The Engineering ToolBox The noise rating graphs for different sound pressure levels are plotted at acceptable sound pressure levels at different frequencies Acceptable sound pressure level vary with the room and the use of it Different curves are obtained for each type of use Each curve is obtained by a NR number Note! Noise Rating - NR - is commonly used in Europe
Control rooms - HSE Designers should be following this standard for new control rooms, and it can usefully be referred to for upgrades and modifications to existing ones especially where there are known problems Process plant control desks utilising human-computer interface: a guide to design, operational and human interface issues
Noise Rating (NR) INFO SHEET - Acoustic Comfort The NR standard Noise Rating curves were developed by the International Organization for Standardization (ISO) to determine the acceptable indoor environment for hearing preservation, speech communication and annoyance These curves range from NR 0 to NR 130 – a simplified version can be seen as a table in figure 1 and as a graph in figure 2
CHAPTER 48. NOISE AND VIBRATION CONTROL - ASHRAE System analysis for noise control uses the source-path-receiver concept The source of the sound is the noise-generating mechanism The sound travels from the source via a path, which can be through the air (airborne) or through the structure (structureborne), or a combination of both paths, until it reaches the receiver (building occupant or outdoor neighbor)
H VAC AC O U S T I C A L A P P L I C AT I O N G U I D E L I N E S - Carrier The procedure for determining the maximum acceptable discharge sound power levels requires the addition of the space effect, end reflection, duct insertion, flow division (or branch power division), and elbow and tees, or some combination of these, to the maximum acceptable room sound pressure levels