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Related to Ambient noise: background noise
ambient noise[′am·bē·ənt ′nȯiz]
The pervasive noise associated with a given environment, being usually a composite of sounds from sources both near and distant.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
The background noise level in a space, which is not identifiable as being from a specific source, such as a nearby piece of equipment.
Illustrated Dictionary of Architecture Copyright © 2012, 2002, 1998 by The McGraw-Hill Companies, Inc. All rights reserved
The all-encompassing, average background noise associated with a given environment, often a composite of sounds from many sources near and far, of many different types, e.g., the general background noise in a neighborhood or in an auditorium.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.