Tracer Products has introduced the Tracerline Marksman ulltrasonic diagnostic tool, an instrument that converts and amplifies inaudible ultrasonic sound into audible “natural” sound. The Marksman uses a two-tiered process to ensure accurate diagnosis. First, the receiver unit converts inaudible sound into audible sound using a process known as heterodyning. Then, the receiver’s Sound Signal Technology fine-tunes the audible sound into the natural sound emitted by the defect itself.