27-10-2012, 11:19 AM
An Acoustic Ground Impedance Measurement
ABSTRACT
A measurement of the acoustic ground impedance was made on soil composed of sand and clay covered by splotchy
amounts of long grass. A sound pressure-volume velocity device was used to make the measurement. The real part of the
ground impedance ranged from 46,662 Pa.s/cu m at 20Hz to 3,076 Pa.s/cu m at 260Hz. The magnitude of the imaginary part
of the ground impedance ranged from 66,974 Pa.s/ cu m at 20Hz to 4,005 Pa.s/cu m at 260Hz. These data are available to
any interested research in the field of sound propagation.