Ground surfaces: Determination of the acoustic impedance (NT ACOU 104)

Size: 240.88 KB
Print
  • Report #: NT ACOU 104
  • Approved: November 1999
  • Hits: 0

Abstract

This NORDTEST method specifies a procedure for the determination of the normalised specific acoustic impedance of flat outdoor ground surfaces in situ. It yields one or several flow resistivity classes the values of which can be translated into the real and imaginary part of the specific acoustic impedance to use for outdoor sound propagation calculations. This NORDTEST method is not suitable for the evaluation of ground impedances below 200 Hz or above 2500 Hz.

Categories

Acoustic | NT Methods

Nordtest

Nordtest is a trademark of Nordic cooperation in conformity assessment. The emphasis of Nordtest is to develop, promote and innovate Nordic test methods and pre-normative activity. Nordtest endeavours to remove technical barriers to trade and promotes the concept: “Approved once, accepted everywhere”.