Hull Shield ultrasonic systems work by emitting pulses of low power signals. These signals are transmitted directly to the hull through transducers attached within the bilge. Antifouling transducers are similar to the transducers you already have installed for sonar & depth finding equipment. In fact, ultrasonic antifouling was first discovered by the US Navy when it was observed that no fouling occurred within a distance of sonar domes found on submarine and ship hulls.
Since that discovery, specific frequencies have been determined to disrupt the growth of marine fouling. For example, barnacle attachment is deterred by frequencies between 20KHz – 25KHz, while the cellular structure and reproductive cycle of algae is disrupted with frequencies between 40KHz – 60KHz.
The Hull Shied system works by created pulses targeting specific frequency bands to effectively reduce and stop marine fouling from attaching to your hull bottom.