J & A Enterprises, Inc.
Noise and Vibration Control Engineers

16 Broadway
Salem, MA 01970
01 + 978-741-1551
home button link
services button link
sounds button link
what's new button link
staff button link
site map button link


turbine fast ferry picture Turbine Fast Ferry
J&A did the acoustic design for the turbine-powered, fast catamaran ferry delivered by Derecktor Shipyard in 1998. The challenge was to design ferry that was comfortably quiet for its customers with sound 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 in the main deck passenger compartment averaged 71 dB(A).) Click here to read an account written in the Maritime Reporter and Engineering News, September 1999, pg. 83.

Fast Ferry - 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.