CONSTRAINTS IN THE APPLICATION OF PERSONAL ACTIVE NOISE REDUCTION SYSTEMS
- Authors
- Corporate Authors
- Defence and Civil Inst of Environmental Medicine, Downsview ONT (CAN)
- Abstract
- Active Noise Reduction (ANR) systems built into personally-worn headsets and helmets, when properly designed and carefully fitted, have shown considerable potential for reducing noise exposure and improving the listening conditions under which auditory tasks are carried out in military operations. Performance limitations have been identified in certain devices, however. Some have a tendency to overload easily or to cease operating under adverse conditions, and others become unstable when the seal around the ear is broken. Recent findings indicate strongly that proper fitting around the ear is a functional necessity for satisfactory ANR operation. This is particularly true of units having a low tolerance to overloading and those which continue to operate in the infrasound frequency range. As a consequence, the function of any ANR system must be understood within the context of its intended operating environment in order to estimate whether the system will perform satisfactorily.
- Report Number
- DCIEM-96-P-56 — Paper
- Date of publication
- 01 Sep 1996
- Number of Pages
- 9
- DSTKIM No
- 99-00090
- CANDIS No
- 510014
- Format(s):
- Hardcopy;Document Image stored on Optical Disk
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