Abstract
In 1985, the ASA Technical Committee S1: Acoustics, drafted the amendment ANSI S1.4A to the current sound level meter standard ANSI S1.4-1983. The aim was to provide A-weighting tolerances to frequencies above 16 kHz for measurement of short-duration transient signals. Dr. Young gave a lot of support during the preparation of that amendment. The current international sound level meter standard IEC 61672-1 (2002): Specifications, has A-weighting tolerances that allow less capable microphones to be used in Class 1 instruments. Under the above IEC standard, microphones that are not capable of measuring sound beyond 16 kHz can be used in IEC Class 1 sound level meters. Some pros and cons will be discussed.
Published Version
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