ASTM E1050-10

Заменен

Standard Test Method for Impedance and Absorption of Acoustical Materials Using A Tube, Two Microphones and A Digital Frequency Analysis System — 12 стр.

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На этот документ ссылаются

DIN ISO 13472-2:2010-12

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ASTM E1050-12

Заменен

Standard Test Method for Impedance and Absorption of Acoustical Materials Using a Tube, Two Microphones and a Digital Frequency Analysis System — 12 стр.

ASTM E1050-08

Заменен

Standard Test Method for Impedance and Absorption of Acoustical Materials Using A Tube, Two Microphones and A Digital Frequency Analysis System — 11 стр.