Mr. Boroditsky has over thirty years
experience in the various areas of acoustics. He has
an advanced degree in Mechanical Engineering from
the Research Institute of Shipbuilding Technology.
His early work was conducted at the St. Petersburg
Research Institute of Shipbuilding Technology. During
his tenure there, Mr. Boroditsky was responsible for
predictions and noise control for many types of ships:
frigates, speed boats, hydrofoils, ice breakers, bulk
carriers, and tugboats.
He also has experience in industrial
acoustics, including noise mitigation projects for
plants, road machines, and ventilation systems. In
the 1970's, Mr. Boroditsky was involved in developing
an algorithm and computer program used to predict
noise levels in ships' compartments. At the end of
the 1970's, he began to research the noise and vibration
induced in ship compartments by propellers.
B.S. (Mech. Engineering)
Marine University, St. Petersburg, Russia
Engineering) Research Institute of Shipbuilding
Technology, St. Petersburg, Russia.
Marine Sound Control
Research Institute of Shipbuilding, 1992-1994
Research Institute of Shipbuilding, 1975-1992
Member – Institute of Noise Control
Responsibilities and Projects
Mr. Boroditsky’s first professional
effort was devoted to the determination of ship structural
non-uniformities on vibro-isolation properties. This
project considered the connections of structural elements,
i.e., decks and bulkheads, hull-linings, and girder-shell
connections. As a practical result, coupling loss
factors for these connections were determined and
recommendations were made to improve their isolation
effectiveness. A novel angle connections was developed
and installed on a hydrofoil ship (BELARUS) and on
a bulk carrier (MURGUB). In the late 1960’s he developed
the first Russian ship floating floors and cabins.
These cabins were mounted in serial tankers (SOFIA)
and in nuclear ice breakers (ARCTICA & ROSSIJA).
In the 1970’s, Leo was involved
in developing an algorithm and computer program to
predict noise level in ship compartments. His responsibility
in this project was to predict element vibration levels.
This problem was solved on the basis of an algebraic
equation system that described the energy balance
of a large array of structural elements formed by
the ship’s hull. As part of this task, he developed
formulas for connection coupling loss factors (diffuse
incidence) and for damping loss factors (standard
structural and special coatings).
Following the research and development
on this project, a computer program was developed
and issued as a Guide for all Design Offices. Soon
this calculation became an obligatory part of any
naval ship design. The input data for this computer
program took in consideration all critical factors
influencing the noise onboard ship: source acoustical
characteristics, structural element materials and
geometry, lining properties, types of hull lining
connections (rigid or elastic), opening through machinery
rooms, etc. Airborne and structureborne sound are
calculated separately. It is possible to evaluate
the contribution of every source and every structural
path in addition to the overall noise in any compartment
of interest. This guide and computer program was used
for many naval and civil ship designs demonstrating
the accuracy between the measured and predicted noise
In the 1980’s, this program, under
Mr. Boroditsky’s direction, was converted for the
personal computer and used by the majority of Russian
naval design offices.
Publication (In Russian)
- “Research of Vibroisolating Properties and Characteristics
of Ship Floating Structures,” Collection of papers
“Noise Control in Ships,” Sudostroenie, 1967, p.54-70.
- “Hydrofoil Propellers Effects on Ship Compartment’s
Noise Levels,” Collection of papers, Collection of
papers “Noise Control in Ships,” Sudostroenie, 1974.
- “Estimating of the Hull Structureborne Vibration
Reduction by Air Sheets,” Journal “Sudostroenie”,
1978, N.8, P7-9.
- “On the Sound Vibration of Speed Boats Bow Outer
Plating,” Journal “Sudostroenie”, 1981, N.11, p11-13.
- “Water Contacting Plates Vibration Reduction by
Air Sheets,” Rumb. Ser. “Acoustics,” 1984, Iss. 19.
- “Acoustic Vibration of Ice Breaker Shell Plating,”
Journal “Sudostroenie”, 1985 N.5, p. 9-11.
- “Algorithm and Computer Program for Ship Compartment
Acoustic Field Calculation in Low Frequencies,” Transaction
of Symposium “Transportation Noise-92”, p.71.
Publication (In English)
“Final Report: Advanced Ship Acoustic
Program, SBIR Topic98-092” (with R Fischer) NCE
Report 98-005, Dec. 1998.
“Noise and Vibration Trials:87’
Coast Guard Patrol Boat,” (with M. Bathiarian &
Ray Fischer) NCE Report 98-002, March 1998.
“AMHS Ferry Vibration Impact Tests,”
(with M. Bathiarian & Ray Fischer) NCE Report
98-001, Feb. 1998.
“Grinder Blower Diagnostic Tests
& Noise Control Recommendations,” (with R. Fischer
& Mike Bathiarian) NCE TM 97-020, July 1997.
Army Corps of Engineers Gatelifter
INVCTIA,” (with M. Bathiarian & Ray fischer)
NCE TM 97-022, Sept. 1997.
DELEWARE II: Trawler Winch Diesel Noise Study Follow
Up,” (with Mike Bathiarian) NCE TM 97-013, June
“Tractor Tug Boat Preliminary Noise
Analysis”, (with R. Fischer), NCE job Memo, August
“Alaskan Ferry HVAC system noise
prediction and control”, (with R. Fischer and M.
Bathiarian), NCE Technical Memo 97-015, June 1997.
“Agor-25 Bow Thruster Diagnostic
Test and Treatment Recommendations”, (with R. Fischer
and M. Bathiarian) NCE Technical Memo 97-012, May
“Noise and Vibration Evaluation-87’
CPB”, (with R. Fischer) NCE Technical Memo 97-007,
Thruster Diagnostics,” (with Kenneth Fischer, Ray
Fischer, and Mike Bathiarian), NCE TM 97-006, Jan.
“Nigh Club Noise Analysis and Abatement”,
(with R. Fischer), NCE Memo, April 1997.
“Vibration and Sonar Trials – AGOR-26,”
(with Kenneth Fischer, Ray Fischer and Mike Bathiarian),
NCE Report 97-004, Jan. 1997.
“Vibration and Sonar Trials Report:
AGOR-25 R/V Atlantis,” (with Kenneth Fischer, Ray
Fischer and Mike Bathiarian), NCE Report 97-002,
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