Jastram Noise Reduction
The Active Jastram Noise reduction is a patented innovation to minimize the noise of the bowthruster unit on any type of vessel. All thrusters create noise by propeller cavitation. Instead of damping the noise, this active device reduces noise at the source by injecting a specific volume of air at carefully chosen locations. An overall noise reduction of up to 15dB can be achieved without losses in thrust efficiency. In addition damping systems are available reducing the structure-born issue.
The Jastram Active Noise Reduction consists of the following parts: