Abstract: The Noise Suppressor II provides procedures and add-on units, which are attached to standard analog or digital ultrasonic flaw detector instruments for either suppressing noise spikes that clutter the flaw detector screens, or other undesired signals, or enhancing weak, barely detectable signals. The add-on units may do both simultaneously as well. Each unit includes an adjustable filter so that a user may tune the filter bandwidth to a specific range within the overall transducer band that coincides with the signal to be either suppressed or enhanced.