||Laboratories Sought for Sound Absorption Round Robin
ASTM C 423, Standard Test Method for Sound Absorption and Sound Absorption
Coefficients by the Reverberation Room Method, is one of the most
widely-used acoustical measuring standards in North America according
to Richard Peppin, a sound-vibration measuring engineer with Scantak,
Inc., Silver Spring, Md., and member of Committee E33. Developed by ASTM Committee E33 on Environmental Acoustics,
the standard has been the basis of numerous laboratory and field
acoustical standards, Peppin said.
Laboratory participation, and comments on a suitable reference
specimen, are sought for an extensive round robin being organized
by a task group of ASTM Sound Absorption Subcommittee E33.01.
The study, initiated by the task group chair, Ron Moulder, chief
acoustical scientist, Certainteed, Blue Bell, Pa., will determine
the precision of ASTM C 423, and compare the test results from
Moulder, who conducted the last ASTM-sponsored round robin for
C 423 in the 80s, said the new precision statement will reflect
substantial revisions to the standard and changing instrumentation
in the lab over the last 20 years.
To participate, contact Ron Moulder, Chief Acoustical Scientist, Certainteed, Blue Bell, Pa. (phone:
610/341-6305). Committee E33 meets April 9-10 in W. Conshohocken,
Pa. For meeting or membership details, contact Staff Manager Steve Mawn (phone: 610/832-9726). //
Copyright 2001, ASTM