Standard Test Method for
Impedance and Absorption of Acoustical Materials Using A
Tube, Two Microphones and A Digital Frequency Analysis
This preferred is issued below the fixed designation e 1050; the wide variety right now following the designation suggests the yr of
unique adoption or, in the case of revision, the 12 months of closing revision. a variety of in parentheses suggests the year of remaining reapproval. a
superscript epsilon (e) shows a piece of writing change since the ultimate revision or reapproval.
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click here to download Astm E 1049 – 85 (Reapproved 1997) pdf free