Abstract
Two speech privacy measurements, Articulation Index (AI) standardized by the American National Standard Institute in 1969 and Speech Privacy Noise Isolation Class (NIC, Noise Isolation Class Prime) adapted from the Noise Isolation Class (NIC) by U. S. General Services Administration (GSA) in 1979, have been claimed as objective tools to measure speech privacy in open offices. To evaluate which of them is a better tool in terms of speech privacy in a dynamic open office environment, the measurements were taken in the field. AIs and NICs in the current workplace settings as well as in the modifications of partition heights and workplace configurations have been measured following ASTM E1130 (Standard Test Method for Objective Measurement of Speech Privacy in Open Offices Using Articulation Index) and GSA test PBS-C.2, respectively.
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