The Vibrosels Method for Physical Modelling Systems

Physical modelling systems are used in several institutions to record data over complex geological models. The dynamic range is limited due to the high frequencies involved. If the dynamic range were improved, physical modelling could be applied to a wider range of studies, e.g. deeper models, or use smaller transducers. The Vibroseis method offers a substantial improvement in signal to noise ratio (of the order of 24 dB) over the conventional method of driving transducers with a pulse. Such an improvement would be difficult to achieve by other means. Furthermore, the sweep signal may be convolved with a filter to correct for the ringy transducer response and obtain a result close to zero-phase Klauder wavelets