Acoustic multi-mode wide-band logging device

A receiver sonde adapted for detecting within a liquid containing borehole at least one wide-band composite signal over a selected operating bandwidth, the wide-band composite signal providing a faithful representation of a selected acoustic wave within the borehole, the receiver sonde comprising:

• a receiver array, the receiver array including at least one receiver station;
• each said receiver station being disposed longitudinally within the receiver array with each said receiver station having a chassis with transducers attached thereon;
• each transducer of the transducers having a frequency response characteristic to an input acoustic signal that includes a lowest resonant response region which is above the highest frequency within the selected operating bandwidth, wherein the transducers are functional to provide an approximately constant ratio in amplitude and substantially little phase difference between an output response signal from each said transducer and the acoustic input signal to each said transducer, wherein the transducer is capable of producing the output response signal to be a faithful representation of the input acoustic signal;
• and
• a composite signal means for selectively combining the output response signals of each said receiver station to provide a composite signal for each said receiver station which is representative of the selected acoustic wave within the borehole.

A receiver sonde for obtaining wide-band output response signals representative of borehole acoustic signals in a liquid containing borehole, the wide-band output response signals being obtained over a selected bandwidth and providing a faithful representation of acoustic signals within the borehole, the receiver sonde comprising:

• a receiver array, the receiver array including at least one receiver station;
• each said receiver station being disposed longitudinally within the receiver array with each said receiver station having a chassis with transducers attached thereon;
• and
• each transducer of the transducers having a frequency response characteristic to an input acoustic signal that includes a lowest resonant response region which is above the highest frequency within the selected operating bandwidth, wherein the transducers are functional to provide an approximately constant ratio in amplitude and substantially little phase difference between an output response signal from each said transducer and the acoustic input signal to each said transducer, wherein the transducer is capable of producing the output response signal to be a faithful representation of the input acoustic signal.