ASA S1.18 – American National Standard Method for Determining the Acoustic Impedance of Ground Surfaces
This Standard describes procedures for obtaining the real and imaginary parts of the normalized acoustic impedance ratio of ground surfaces from in-situ measurements of the sound pressure levels at two vertically separated microphones using specified geometries and the averaged values of the difference between the simultaneous, instantaneous sound-pressure signals at the two microphones. It enables the user to either deduce parameters for a ground impedance model by fitting spectral data to templates or obtain values of the normalized specific acoustic impedance ratio of the ground entirely from measurements andindependently of any model for the acoustic impedance of the ground surface except as a check on the validity of the resulting values.
Product Details
- Published:
- 2018
- ANSI:
- ANSI Approved
- Number of Pages:
- 58
- File Size:
- 1 file , 2 MB
- Note:
- This product is unavailable in Ukraine, Russia, Belarus
Related products
-
ASA S3/SC1.100
$121.00$72.60Add to cartAmerican National Standard Methods to Define and Measure the Residual Sound in Protected Natural and Quiet Residential Areas
Published by Publication Date Number of Pages ASA 12/05/2014 32 -
ASA TR S12.9 Part 6
$35.00$21.00Add to cartASA Technical Report – Rationale for Withdrawing ANSI/ASA S12.9-2008/Part 6
Published by Publication Date Number of Pages ASA 07/22/2018 32 -
ASA S3.45
$132.00$79.20Add to cartAmerican National Standard Procedures for Testing Basic Vestibular Function
Published by Publication Date Number of Pages ASA 01/01/2009 38 -
ASA S3.55 Part 5
$70.00$42.00Add to cartAmerican National Standard Electroacoustics – Simulators of Human Head and Ear – Part 5: 2 cm*2 Coupler for the Measurement of Hearing Aids and Earphones Coupled to the Ear by Means of Ear Inserts (a modified nationally adopted international standard)
Published by Publication Date Number of Pages ASA 07/21/2014 20