1.1This test method covers the measurement of the interzone attenuation for three components of open-plan spaces:
1.1.1Ceiling systems when used in conjunction with partial-height space dividers. This arrangement is commonly used in offices to achieve speech privacy between work zones in the absence of full-height partitions. This test method is applicable to any ceiling configuration, including, for example, a pattern of sound-reflective panels in an otherwise sound-absorptive ceiling. This test method generally requires use of a fixed space divider height of 1.50 m [5 ft]. In recognition of trends toward alternate divider heights in open office environments, measurements with an alternate divider height may be conducted in accordance with this standard.
1.1.2Furniture panels used as acoustical barriers in open-plan spaces to provide speech privacy or sound isolation between working positions.
1.1.3Vertical panels, including wall finishes such as sound-absorbent panels, and furniture panels or screens which may reflect sound. It may not be applicable to such items as window finishes or furniture other than panels if these differ significantly from flat wall panels.
1.1.4The combination of results from the various components of an open-plan office is beyond the scope of this standard.
1.2The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard.
1.3Unless otherwise qualified, all dimensions specified in this test method shall be understood to have a tolerance of ±6 mm (±1/4in.) The values stated in SI units are to be regarded as the standard. The values given in parentheses are provided for information only.
1.4This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.