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About This Item


Full Description

Provides an economical method for rapid and absolute measurement of the normal incidence sound absorption coefficient and the specific normal acoustic impedance of a sound absorbing system, e.g. a material with a rigid backing or with air space and rigid plate backing.

Document History

  1. AS/NZS 1935.1:1998

    Acoustics - Determination of sound absorption coefficient and impedance in impedance tubes, Part 1: Method using standing wave ratio

    • Most Recent
  2. AS 1935-1976


    Method for measurement of normal incidence sound absorption coefficient and specific normal acoustic impedance of acoustic materials by the tube method

    • Historical Version