Kevin VanDam runs his Hydrowave at all times when bass fishing. Most observers of bass, divers included, have witnessed the power of sound and its ability to stimulate curiosity and feeding behavior in underwater environments.
Instead of a diver attracting fish by clicking rocks together, the Hydrowave H2 comes preloaded with several sound recordings that imitate audible underwater sounds of baitfish and fish-feeding activities.
Kevin discusses how he employs different sounds, sound patterns and delays based on the situation. More isn't always more when it comes to sound projection; Kevin recommends matching your sound pattern to the conditions. If fish are active, run a more aggressive sound profile. If fish are neutral to negative (most of the time), consider using delays of various durations and lowering the volume.