The pH electrode is an active transducer
requiring energy for its operation.
In its AntiSubmarine Warfare (ASW) role the RMMV tows an active transducer
and a multi-function receive array, transmitting submarine contact data via data links to the host ship.
Three active transducer
ports allow clinicians to have three transducers ready for use at the touch of a button.
For instance, four active transducer
ports enable the user to have four transducers instantly available during exams with only the touch of a key.
By incorporating four active transducers
and two visible JBL Bass Radiators, the JBL Xtreme produces sound you can feel," according to a statement.
Currently being reviewed by the Innovative Design Association for the best design of 1997, the wand illuminates in a "light show" that reflects the positions of the active transducers