90.93 Standard confirmed Mar 21, 2022
ISO/TC 43/SC 2 Building acoustics
17.140.01 Acoustic measurements and noise abatement in general
Specifies a method for the determination of the sound absorption coefficient, reflection factor, surface impedance or admittance of materials and objects. The values are determined by evaluation of the standing wave pattern of a plane wave in a tube, which is generated by the superposition of an incident sinusiodal plane wave with the plane wave reflected from the test object.
90.93 Standard confirmed
Mar 21, 2022