A [[well log]] made with a tool designed to correct for unwanted effects associated with the borehole. The [[compensated density log]] uses the signal from a secondary detector to correct for the effect of mud cake and small irregularities in the borehole wall. The borehole compensated sonic log uses a special arrangement of the [[transducer|transducers]] to correct tor irregularities in borehole size and [[sonde]] tilt.