Sailing Yachts J & A Enterprises, Inc. Noise and Vibration Control Engineers 16 Broadway Salem, MA 01970 01 + 978-741-1551 SAILING YACHTS To keep sailing the yacht, pictured above..., within J-class racing limits, J&A Enterprises designed noise controls optimized for lightweight. To reduce exhaust system noise, custom exhaust silencers were designed and built... by J&A's affiliate, Soundown. Special silencers were developed for the engine room ducts, designed to meet fire protection requirements and meet noise attenuation goals...

Fast Ferries J & A Enterprises, Inc. Noise and Vibration Control Engineers 16 Broadway Salem, MA 01970 01 + 978-741-1551 FAST FERRIES Turbine Fast Ferry J&A did the acoustic... proofing that was light weight enough to minimally impact the high speed capabilities of the ferry. The vessel met the acoustic design predictions from J&A. (Noise level at 48 knots... - 73M J&A is the acoustic designer for a 73 meter fast ferry, diesel. The boat is only a 33 knot vessel, but there are severe weight penalties and weight savings rewards which are reflected in J&A's insulation design. ...

Power Boats J & A Enterprises, Inc. Noise and Vibration Control Engineers 16 Broadway Salem, MA 01970 01 + 978-741-1551 POWER BOATS Classic Picnic Boat This classic picnic boat... carries a J&A invented waterdrop exhaust silencer. It is a 44 foot waterjet powered Hinkley class picnic boat. It has the design of a no-nonsense, functional New England lobster boat..., easy handling and a safe, quiet ride. J&A's innovative design was able to deliver a quiet cruise for its owners. ...

Military Vessels J & A Enterprises, Inc. Noise and Vibration Control Engineers 16 Broadway Salem, MA 01970 01 + 978-741-1551 MILITARY VESSELS Navy RAC Quieting a boat may... detection of noises off the vessel. These sound levels exceeded the current requirements for the Navy Small Unit Riverine Craft (SURC). J&A determined that solutions could... be implemented with minimal impact on vessel weight or performance. J&A recommended modifying the existing exhaust box with its patented "Dual Lift" outlet pipe. The total package of noise...

Motor Yachts J & A Enterprises, Inc. Noise and Vibration Control Engineers 16 Broadway Salem, MA 01970 01 + 978-741-1551 MOTOR YACHTS J&A was the acoustical designer for aluminum... motoryacht, over 500 tons MCA. The boat grew in gross tonnage to be over 500 tons in the course of design, and J&A had to redo the insulation package to meet the more restrictive... motoryacht's built in Australia. As such, the shipyard sought the expertise of J&A's engineering team to devise innovative, fire-rated insulation systems which would meet the latest MCA...