Abstract
In the past decade, the increasing use of sound level meters in industry has fully demonstrated their value. However, with this increasing use, there has grown a more critical attitude with respect to their relative performance. A fundamental criticism, particularly in the case of acceptance measurements, has been the frequently observed lack of agreement among sound level meters of different manufacturers though calibrated to the same reference level and fulfilling the performance requirements of the A.S.A. This paper discusses the factors responsible for this condition based on experience in the development of sound level meters and their application to industrial problems. Suggestions are advanced relative to both procedures and standards that should aid materially in clarifying and improving the existing situation.
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