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    <title>Transport Research International Documentation (TRID)</title>
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    <copyright>Copyright © 2026. National Academy of Sciences. All rights reserved.</copyright>
    <docs>http://blogs.law.harvard.edu/tech/rss</docs>
    <managingEditor>tris-trb@nas.edu (Bill McLeod)</managingEditor>
    <webMaster>tris-trb@nas.edu (Bill McLeod)</webMaster>
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      <title>Transport Research International Documentation (TRID)</title>
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      <title>Numerical Assessment of Underwater Noise Radiated by a Cruise Ship</title>
      <link>https://trid.trb.org/View/1498820</link>
      <description><![CDATA[The present paper deals with a methodology for the prediction of propeller-induced acoustic pressures and associated ship response, having considered propellers as the main acoustic source onboard ships. Semi-empirical and numerical approaches have been coupled for the characterisation of the propeller and the determination of the radiated acoustic field, respectively. The boundary element method has been used for numerical analyses, and a commercial solver has been adopted. The procedure has been applied to a cruise ship, and numerical results have been compared to the available experimental measurements. Other two different ships have been taken into account in order to test the methodology. Results show that the influence of the structural finite element mesh of the ship on the computation is comparable to acoustic characterisation of the propeller. Furthermore, it is found that the reliability of semi-empirical methods is not completely satisfactory; nevertheless, they are currently used at an early design stage as common practice.]]></description>
      <pubDate>Fri, 22 Jun 2018 16:40:44 GMT</pubDate>
      <guid>https://trid.trb.org/View/1498820</guid>
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    <item>
      <title>USE OF DAMPING MATERIALS FOR NOISE REDUCTION ON PASSENGER SHIP</title>
      <link>https://trid.trb.org/View/2623</link>
      <description><![CDATA[Survey of noise and vibration levels in car-carrying passenger ship indicates that an important contribution to noise in some of passenger cabins is due to reverberation of large areas of metal forming the walls and floor in adjacent store area.  Trials are described in which approximately 800 sq ft of viscoelastic damping material is applied to these surfaces.  A small but significant reduction in cabin noise level is obtained.  It is argued that large scale use of damping materials at the time of building could result in appreciably quieter ships.]]></description>
      <pubDate>Sat, 08 Nov 2003 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/2623</guid>
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      <title>TEST AND EVALUATION OF THE BELL-HALTER 110-FOOT SURFACE EFFECT SHIP DEMONSTRATION CRAFT</title>
      <link>https://trid.trb.org/View/169279</link>
      <description><![CDATA[Comparative seaworthiness and towing tests were performed with an 82-foot USCG WPB. Other major test categories yielded speed, range, fuel consumption, directional stability, turning, acceleration, and noise characteristics. Limited maintainability and reliability information was compiled and manning and human factors considerations were studied. The SES craft was operated in sea state 2 at speeds of 29 knots with significant vertical acceleration peaks in the passenger compartment of 0.6 g and in sea state 4 at 26 knots with peaks of 0.5 g. Maximum vertical acceleration peaks under these conditions were 0.9 and 1.5 g's, respectively. The SES craft towed the 82-foot USCG WPB at speeds to 11 knots. The maximum measured calm water speed of the SES was 33 knots at a displacement of 121 long tons and a fuel consumption of 6.9 gallons per nautical mile yielding a top speed maximum range of 672 nautical miles. Turing performance and directional control were maintained during simulated combinations of propulsion and lift engine impairment.]]></description>
      <pubDate>Fri, 15 Aug 2003 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/169279</guid>
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    <item>
      <title>METHOD OF MOUNTING A SPOOL MOUNT IN AN OPENING IN THE HULL OF A VESSEL; PATENT</title>
      <link>https://trid.trb.org/View/406016</link>
      <description><![CDATA[A method for replacing a spool mount or other noise reducing device which is located in a confined area. The tool for practicing the method includes both extraction elements and installation elements. The extraction elements include an extraction guide, an extraction stud, and an extraction rider. The installation elements include an extension guide, a compression guide, and an installation rider. The tool drastically reduces the time required for replacement of a spool mount and does not require any cutting or welding.]]></description>
      <pubDate>Mon, 03 Oct 1994 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/406016</guid>
    </item>
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      <title>HYDRODYNAMIC HULL DAMPING (PHASE 1); FINAL REPT</title>
      <link>https://trid.trb.org/View/406172</link>
      <description><![CDATA[Hull girder vibrations are a major concern for ship designers and operators and are a priority in the ship design process. Significant efforts are made to decrease vibrations levels and to reduce damage and noise attributed to vibrations. Attenuation of ship vibration is an important aspect of ship design. The report contains a research plan for ship vibration damping, including analytical calculations, model testing, and full scale measurements. The major elements of this effort included: (1) collection and analysis of vibration damping information, (2) preparation of a model testing and data analysis plan, and (3) preparation of a full-scale testing and data analysis plan. Discussions of specific techniques and recommended procedures are presented in summary form with appropriate references cited. Recommendations represent the state-of-the-art in vibration technology at the time the report was finalized.]]></description>
      <pubDate>Mon, 03 Oct 1994 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/406172</guid>
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    <item>
      <title>APPLICATION OF A LARGE-SCALE SEA MODEL TO A SHIP NOISE PROBLEM</title>
      <link>https://trid.trb.org/View/408349</link>
      <description><![CDATA[In this paper, a Statistical Energy Analysis (SEA) of a ship structure and its spaces is presented in the context of sonar ping noise. The SEA results are compared to experimental results for several different scenarios, and the comparison shows that SEA is capable of producing good predictions of compartment noise as well as important insights regarding noise control. Preliminary testing and analyses conducted at Naval Undersea Warfare Center, Detachment New London, CT on a new, high power active sonar system indicated that sonar ping noise could pose a significant habitability problem. In order to address this, NUWDCNL sought a means to assess the impact of the potential ping noise problem the new system could create on a ship and to determine approaches to minimizing that impact.]]></description>
      <pubDate>Wed, 27 Jul 1994 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/408349</guid>
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    <item>
      <title>NOISE CRITERIA FOR SHIPS AND OFFSHORE PLATFORMS</title>
      <link>https://trid.trb.org/View/408351</link>
      <description><![CDATA[The U.S. has never regulated offshore platform noise levels or exposure to noise. Some governments of European countries have limits for offshore platform noise, but as yet there is no unified strategy by the EEC to limit noise in the work place, including noise on ships and offshore platforms. Any comprehensive plan for limiting ship and offshore platform noise exposure must set noise limits: (1) on exposure such that employees' 24-hour exposures are acceptable; (2) for different compartments or areas; and (3) for emission levels from equipment which is used intermittently in order to prevent these items from being a health hazard. Sufficient incentive must be given to encourage noise control in the design phase.]]></description>
      <pubDate>Wed, 27 Jul 1994 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/408351</guid>
    </item>
    <item>
      <title>ACOUSTIC PERFORMANCE OF THE HIGHLY SKEWED PROPELLER OF A RO-RO CONTAINER SHIP</title>
      <link>https://trid.trb.org/View/402530</link>
      <description><![CDATA[A description is given of experiments that were performed on board a ro/ro ship to determine the acoustic performance of a highly skewed propeller. The main objective was to ascertain the acoustic source strength and frequency spectrum of the fluctuating volume of propeller cavitation. It was found that the substitution of a highly skewed propeller reduced the acoustic source strength of the propeller cavitation. This lower source strength leads to a substantial reduction of the low frequency components of hull pressures and hull plate vibrations. A corresponding reduction of vibrations in the afterbody of the ship and of noise in accommodation and work spaces is suggested by the data.]]></description>
      <pubDate>Thu, 21 Jul 1994 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/402530</guid>
    </item>
    <item>
      <title>RUBBER-MOUNTED SUPERSTRUCTURE REDUCES NOISE IN NEW ESSO PRODUCTS CARRIER</title>
      <link>https://trid.trb.org/View/165684</link>
      <description><![CDATA[A 2,190 tonne d.w. ESSO products carrier, recently delivered by Cochrane Shipbuilders Ltd. of Yorkshire, England, is believed to be the first British-owned ship to incorporate a noise reduction system (developed, manufactured and patented by Grunsweig and Hartmann of Hamburg) which involves mounting the entire deckhouse structure on flexible rubber mountings.  The mountings are designed to prevent noise from the machinery being transmitted into the accommodation spaces, and to achieve this as effectively as possible there are no rigid links between the main hull and the deckhouse.  The mountings themselves consist of rubber strips sandwiched between two halves of a channel-section arrangement fixed longitudinally along the ship.  Rubber mountings are positioned at either end of the deckhouse to prevent fore and aft movement of the deckhouse by acting as buffers in the event of a collision.]]></description>
      <pubDate>Thu, 12 Mar 1981 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/165684</guid>
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      <title>A SIMPLE METHOD FOR PREDICTING SUBJECTIVE RESPONSE TO NOISE ON NAVY SHIPS</title>
      <link>https://trid.trb.org/View/155429</link>
      <description><![CDATA[A graphical method of data analysis is presented for predicting response of shipboard personnel to airborne noise when compartment type and sound level are specified. To illustrate application of the method, the author used the subjective responses of personnel rate stateroom noise aboard eight U.S. Naval ships on a 5-point scale ranging from satisfactory to unsatisfactory. These ratings were then plotted as a function of A-weighted sound level and three parameters were estimated. Graphs for predicting subjective ratings from level were then constructed. (Author)]]></description>
      <pubDate>Tue, 22 Jul 1980 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/155429</guid>
    </item>
    <item>
      <title>AIRBORNE NOISE LEVELS ON MERCHANT SHIPS. A COMPILATION OF DATA</title>
      <link>https://trid.trb.org/View/150564</link>
      <description><![CDATA[This document provides general guidance in the development of noise standards for US merchant ships. It is one of several dealing with various aspects of noise as related to the safety of personnel and habitability aboard merchant ships. It summarizes selected A- and C-weighted sound pressure level data for each type of space aboard merchant ships of US flag and non-US flag. The data were extracted or derived from available literature and from recent NOSC measurements. (Author)]]></description>
      <pubDate>Thu, 26 Jun 1980 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/150564</guid>
    </item>
    <item>
      <title>ACOUSTICS--MEASUREMENT OF NOISE EMITTED BY VESSELS ON INLAND WATERWAYS AND HARBORS</title>
      <link>https://trid.trb.org/View/144243</link>
      <description><![CDATA[This International Standard specifies the conditions for obtaining reproducible and comparable measurements of the noise level and the noise spectrum emitted by vessels of all kinds on inland water-ways and harbours.  This International Standard can also be applied to small sea-going vessels, harbour vessels and dredgers.  In the annex, specifications for intake or exhaust noise measurement and measurements with stationary vessels are given.]]></description>
      <pubDate>Mon, 11 Feb 1980 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/144243</guid>
    </item>
    <item>
      <title>CODE OF PRACTICE FOR NOISE LEVELS IN SHIPS</title>
      <link>https://trid.trb.org/View/144412</link>
      <description><![CDATA[The code of practice deals with means of measurement of noise level, recommendations for acceptable maximum noise levels, means of protecting seafarers from the risk of noise-included hearing loss, and noise abatement measures generally applicable on board ships.  Formats for presentation of ship noise survey results are presented in some detail, and methods of calculating equivalent continuous sound level and of converting octave band sound pressure levels to "A-weighted" sound levels are included in the appendix, which also contains a section on ear protectors.  Order from NSFI as No. 18611.]]></description>
      <pubDate>Mon, 11 Feb 1980 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/144412</guid>
    </item>
    <item>
      <title>NOISE LEVELS AND CREW NOISE EXPOSURE ABOARD US MERCHANT VESSELS. DATA MEASURED ON SEVEN SHIPS DURING NORMAL CRUISING</title>
      <link>https://trid.trb.org/View/143817</link>
      <description><![CDATA[To establish a data base for a US position on allowable noise on merchant vessels, NOSC was tasked by the US Coast Guard to obtain up-to-date data on noise levels on a small sample of US merchant vessels. This was done on seven vessels selected from representative types of the US merchant fleet available during the period September to December 1978. Data from the seven vessels measured are presented in this report. (Author)]]></description>
      <pubDate>Mon, 11 Feb 1980 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/143817</guid>
    </item>
    <item>
      <title>AIRBORNE NOISE LIMITS FOR MERCHANT SHIPS. RECOMMENDED ACOUSTICAL CRITERIA TO INSURE ACCEPTABLE FUNCTIONAL AND HABITABLE ENVIRONMENTS IN CREW QUARTERS AND WORK STATIONS</title>
      <link>https://trid.trb.org/View/143815</link>
      <description><![CDATA[Noise criteria are recommended for US merchant ships, based on: (1) known noise effects on personnel, (2) existing noise criteria and standards, and (3) a data base of existing shipboard noise levels, augmented by recent measurements aboard seven ships. The recommended criteria are well within the state of the art, assuming the wearing of ear protectors in machinery spaces, additions of enclosed engine control rooms, or both. A set of criteria with an even lower risk of hearing damage and somewhat better habitability is proposed for new ships. (Author)]]></description>
      <pubDate>Mon, 11 Feb 1980 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/143815</guid>
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