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NASA-TM-X-71627 - INTERIM PREDICTION METHOD FOR LOW FREQUENCY CORE ENGINE NOISE Organization: NASA
Date: 1974-01-01
Description: A literature survey on low-frequency core engine noise is presented. Possible sources of low frequency internally generated noise in core engines are discussed with emphasis on combustion and component scrubbing noise.
ESDU 02020 - AN INTRODUCTION TO AIRCRAFT NOISE Organization: ESDU
Date: 2013-08-01
Description: These contributions are further broken down, for the jet into jet mixing and shock noise and for the fan and compressor into blade passing frequency tones (including rotor-stator interaction effects), shaft-order tones and broad-band noise. Propeller and rotor noise are then discussed, followed by airframe noise including sonic boom.
ESDU 12001 - PREDICTION OF TURBINE NOISE FROM AERO-ENGINES Organization: ESDU
Date: 2012-03-01
Description: ESDU 12001 provides a means of estimating the noise levels in one-third octave bands emanating from the turbine within a gas turbine engine which may be either static or flying.
ICAO 9943 - REPORT TO CAEP BY THE CAEP NOISE TECHNOLOGY INDEPENDENT EXPERT PANEL AIRCRAFT NOISE TECHNOLOGY REVIEW AND MEDIUM AND LONG TERM NOISE REDUCTION GOALS Organization: ICAO
Date: 2010-01-01
Description: For the engine, component noise reduction technology status presentations were given for fan noise, jet noise, core noise, and nacelle/liner suppression.
ISUZU ISC-C93-004 - POLYESTER FIBER AND POLYESTER NON-WOVEN FABRIC FOR NOISE INSULATION - JAPANESE/ENGLISH VERSION; REPLACES ISC-5SFAS02552-WITHOUT REVISION; ISUZU RESTRICTED/CONFIDENTIAL STANDARD - TO PURCHASE CALL 1-800-854-7179 USA/CANADA, 3030-397-7956 WORLDWIDE OR CONTACT NEAREST IHS SALES REP. Organization: ISUZU
Date: 2008-12-19
Description: This standard covers the noise insulating material moldings (hereafter called "insulation"), composed of PET felt core combined with fluorinated non-woven fabric surface material, mainly used for exterior noise reduction.
NBN - EN 1265 - NOISE TEST CODE FOR FOUNDRY MACHINES AND EQUIPMENT Organization: NBN
Date: 2009-02-27
Description: The use of this standard ensures the reproducibility of the determination of the noise emission characteristics within specified limits determined by the grade of accuracy of the basic noise measurement method used. Noise measurement methods allowed by this standard are engineering methods (grade 2) and survey methods (grade 3).
NBN - EN 1265 - NOISE TEST CODE FOR FOUNDRY MACHINES AND EQUIPMENT Organization: NBN
Date: 2009-02-27
Description: The use of this standard ensures the reproducibility of the determination of the noise emission characteristics within specified limits determined by the grade of accuracy of the basic noise measurement method used. Noise measurement methods allowed by this standard are engineering methods (grade 2) and survey methods (grade 3).
ESDU - 05001 - PREDICTION OF COMBUSTOR NOISE FROM GAS TURBINE ENGINES Organization: ESDU
Date: 2011-03-01
Description: ESDU 05001 provides a means of estimating the noise levels in one-third octave bands resulting from the combustion process within a gas turbine engine which may be either static or flying.
ESDU 05001 - PREDICTION OF COMBUSTOR NOISE FROM GAS TURBINE ENGINES Organization: ESDU
Date: 2016-08-01
Description: ESDU 05001 provides a means of estimating the noise levels in one-third octave bands resulting from the combustion process within a gas turbine engine which may be either static or flying.
VDI 3757 - CHARACTERISTIC NOISE EMISSION VALUES OF TECHNICAL SOUND SOURCES - FOUNDRY MACHINES Organization: VDI
Date: 1996-05-01
Description: It applies to all grids independent of the grid deck dimensions and the excitation mechanism; — dry blasting equipment used for desanding, descaling or other surface treatment procedures of the object to be blasted: centrifugal wheel blast equipment (blasting abrasive media is accelerated by means of centrifugal wheels) air blasting equipment (blasting abrasive media is accelerated by means of pressurized air) Purpose This Guideline includes a description by means of examples of the noise emitted by the machines mentioned in the above scope with the noise emission having been determined by means of standardized measurement methods (see clause 3 and 4.3).
DS/EN 1265 + A1 - SAFETY OF MACHINERY - NOISE TEST CODE FOR FOUNDRY MACHINES AND EQUIPMENT Organization: DS
Date: 2008-12-11
Description: noise emission values"" within specified limits determined by the grade of accuracy of the basic noise measurement method used. Noise measurement methods allowed by this standard are engineering methods (grade 2) and survey methods (grade 3).
ISUZU ISC-C93-009 - PARFORMANCE REQUIREMENTS OF ACOUSTIC MATERIAL;GLASS WOOL AND SURFACE MATERIAL (MADE OF ALUMINUM FOIL , GLASS YARN AND POLYETHYLENE FILM) - JAPANESE/ENGLISH VERSION; ISUZU RESTRICTED/CONFIDENTIAL STANDARD - TO PURCHASE CALL 1-800-854-7179 USA/CANADA, 303-397-7956 WORLDWIDE OR CONTACT NEAREST IHS SALES REP. Organization: ISUZU
Date: 2016-06-01
Description: This standard covers the noise insulating material moldings(hereafter called “insulation”), composed of Glass wool core combined with surface material made of aluminum foil , glass yarn and polyethylene film(hereafter called “ALY”), mainly used for exterior noise reduction.
NBN - EN 1265 - CODE D'ESSAI ACOUSTIQUE POUR MACHINES ET ÉQUIPEMENTS DE FONDERIE Organization: NBN
Date: 2009-02-27
Description: The use of this standard ensures the reproducibility of the determination of the noise emission characteristics within specified limits determined by the grade of accuracy of the basic noise measurement method used. Noise measurement methods allowed by this standard are engineering methods (grade 2) and survey methods (grade 3).
IEEE 1415 - INDUCTION MACHINERY MAINTENANCE TESTING AND FAILURE ANALYSIS Organization: IEEE
Date: 2006-12-06
Description: The guide addresses the following machine systems: — Stator (winding and wore) — Rotor (winding and core) — Vibration and noise — Bearings and shafts — Structure, frame — Ventilation — Accessories Purpose This document is intended for the following purposes: — To provide guidance concerning the appropriateness of various maintenance tests and interpreting the results of those tests with respect to failure analysis and to routine predictive maintenance activities — To provide a methodology by which the most probable cause of any particular machine failure may be determined — To encourage the establishment of routine and uniform data collection so valuable facts of the failure are not destroyed — To facilitate cooperative efforts by users and manufacturers during failure analysis
NASA-CR-121016 - PROPULSION SYSTEM STUDIES FOR AN ADVANCED HIGH SUBSONIC, LONG RANGE JET COMMERCIAL TRANSPORT AIRCRAFT Organization: NASA
Date: 1972-01-01
Description: The economic penalties of environmental constraints - noise and exhaust emissions - are assessed. The highest specific thrust engine (lowest bypass ratio for a given core technology) achievable with a single-stage fan yields the best economics for a Mach 0.95 - 0.98 aircraft and can meet the noise objectives specified, but with significant economic penalties.
NR - BR 1848 - THE SUPPLY OF LONGITUDINAL INDUCTORS FOR RAILWAY TELECOMMUNICATIONS Organization: NR
Date: 1981-11-01
Description: GENERAL This specification covers the supply of longitudinal induotors for Insertion between the cable line and the equipment to improve the signal to noise ratio. This longitudinal choke is a double wound ferite cored inductor, the two coils being identical.
DS/EN 1520 - PREFABRICATED REINFORCED COMPONENTS OF LIGHTWEIGHT AGGREGATE CONCRETE WITH OPEN STRUCTURE WITH STRUCTURAL OR NON-STRUCTURAL REINFORCEMENT Organization: DS
Date: 2011-09-21
Description: This European Standard is for prefabricated components of lightweight aggregate concrete (LAC) with open structure and with structural or non-structural reinforcement intended to be used in building construction a) for structural elements: - loadbearing wall components (solid, hollow core or multilayer); - retaining wall components (solid) with or without surcharge loading; - roof components (solid, hollow core or multilayer); - floor components (solid, hollow core or multilayer); - linear components (beams or piers). b) for non-structural elements: - non-loadbearing wall components (e.g. for partition walls); - cladding components (without fixtures) intended to be used for external facades of buildings; - small box culverts used to form channels for the enclosure of services; - components for noise barriers.
ASA - ANSI/ASA S12.60 PART 2 - AMERICAN NATIONAL STANDARD ACOUSTICAL PERFORMANCE CRITERIA, DESIGN REQUIREMENTS, AND GUIDELINES FOR SCHOOLS, PART 2: RELOCATABLE CLASSROOM FACTORS Organization: ASA
Date: 2009-09-02
Description: The control of background noise levels in this standard is achieved, in part, by specifying the minimum outdoor-to-indoor level reduction for noise that intrudes into the classroom or learning space from sources outside of the school building envelope, and noise isolation for school building elements for noise that originates within the school building and intrudes into the classroom through classroom walls and partitions, floor-ceiling assemblies, and ventilation systems. This standard does not apply to noise generated within a classroom by its occupants.
NBN - EN 1520 - PREFABRICATED REINFORCED COMPONENTS OF LIGHTWEIGHT AGGREGATE CONCRETE WITH OPEN STRUCTURE WITH STRUCTURAL OR NON-STRUCTURAL REINFORCEMENT Organization: NBN
Date: 2011-05-20
Description: This European Standard is for prefabricated components of lightweight aggregate concrete (LAC) with open structure and with structural or non-structural reinforcement intended to be used in building constructiona) for structural elements:- loadbearing wall components (solid, hollow core or multilayer);- retaining wall components (solid) with or without surcharge loading;- roof components (solid, hollow core or multilayer);- floor components (solid, hollow core or multilayer);- linear components (beams or piers).
NBN - EN 1520 - COMPOSANTS PRÉFABRIQUÉS EN BÉTON DE GRANULATS LÉGERS À STRUCTURE OUVERTE ARMÉES AVEC DES ARMATURES STRUCTURALES ET NON-STRUCTURALES Organization: NBN
Date: 2011-05-20
Description: This European Standard is for prefabricated components of lightweight aggregate concrete (LAC) with open structure and with structural or non-structural reinforcement intended to be used in building constructiona) for structural elements:- loadbearing wall components (solid, hollow core or multilayer);- retaining wall components (solid) with or without surcharge loading;- roof components (solid, hollow core or multilayer);- floor components (solid, hollow core or multilayer);- linear components (beams or piers).

1 - 20 of 43 results