Low frequency acoustic ground impedance
β
Mark W. Sprague; Richard Raspet; Henry E. Bass; James M. Sabatier
π
Article
π
1993
π
Elsevier Science
π
English
β 1004 KB
## ABSTRA CT The low frequency (below 150 Hz) acoustic ground impedance was determined on a large uncultivated field using an impedance meter, the probe microphone method, a modified Biot-Stoll type calculation, and the phase gradient method. The impedance measured with the impedance meter has low