A Tidal Generator For Energy And Jobs

EE 34 September 1987 would be displayed by the dis- play units. The transmitted power levels would set a more stringent limit on large distance measure- ments. The power received by Rx would decrease rapidly with the increasing distance. Since heart dimensions of 50-150 mm were measured, power con- siderations were not a limitation on the experiments. The system was in no way comparable to X- Ray tomography, emission tomography or some other ad- vanced ultrasonic devices. These are used for non-invasive clinical applications to man and they are far superior in distance measurements to the system here. The system constructed was solely used in the labora- tory to give some notional data of the heart simply and effi- ciently. It could quite easily be used for any biological sample, once the sound velocity in it was known. A large signal amplitude was always present at the receiver terminals corresponding to the minimum path through the heart. Other reflections from the side walls we...