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ANSI/ASA S12.10 PART 2 - American National Standard Acoustics - Measurement of Airborne Noise Emitted by Information Technology and Telecommunications Equipment - Part 2: Declaration of Noise Emission Levels
January 1, 2011 - ASA

This Standard applies to information technology and telecommunications equipment. This Standard specifies: - the method of determining the declared noise emission values of a batch of machines, - acoustical and product information to be given in technical documents supplied to users by the...

IEC 60034-9 - Rotating Electrical Machines - Part 9: Noise Limits
July 1, 2007 - IEC

This part of IEC 60034: - specifies test methods for the determination of sound power level of rotating electrical machines; - specifies maximum A-weighted sound power levels for factory acceptance testing of rotating electrical machines in accordance with IEC 60034-1, having methods of cooling...

ATIS T1.TR.74 - Objective Video Quality Measurement Using a Peak- Signal-to-Noise-Ratio (PSNR) Full Reference Technique
October 1, 2001 - ATIS

This technical report specifies the method for measuring the peak-signal-to-noise-ratio (PSNR) of oneway video transmission systems, as shown in Figure 1. The objective PSNR measurement is defined for the end-to-end transmission quality between the two points shown in Figure 1. This report...

AGMA 97FTM15 - Design, Generation, Stress Analysis and Test of Low-Noise, Increased Strength Face - Milled Spiral Bevel Gears
November 1, 1997 - AGMA

A modified geometry of face-milled spiral bevel gears with uniform and tapered teeth that provides a localized bearing contact, reduces the level of noise and increases the strength of the teeth has been developed. The modified geometry is based on application of specially developed machine-tool...

ISO 7029 - Acoustics - Statistical distribution of hearing thresholds related to age and gender
January 1, 2017 - ISO

This document provides descriptive statistics of the hearing threshold deviation for populations of otologically normal persons of various ages under monaural earphone listening conditions. It specifies the following, for populations within the age limits from 18 years to 80 years for the range of...

DSF/FPREN 13487 - Heat exchanger – Forced convection air cooled refrigerant condensers and dry coolers – Sound measurement
DS

1.1 General This European Standard is one of a series of European Standards dedicated to air-cooled heat exchangers. - forced convection air cooled refrigerant condensers as specified in EN 327; - forced convection unit air coolers for refrigeration as specified in EN 328; - air cooled liquid...

HIGH FREQUENCY TECHNIQUES An Introduction to RF and Microwave Engineering
August 1, 2016 - WILEY

This textbook provides a fundamental approach to RF and microwave engineering. It is unusual for the thoroughness with which these areas are presented. The effect is that the reader comes away with a deep insight not only of the design formulation but answers to how and why those formulations work....

MIL-STD-202-308 - TEST METHOD STANDARD METHOD 308, CURRENT-NOISE TEST FOR FIXED RESISTORS
April 18, 2015 - NPFC

Purpose. This resistor noise test method is performed for the purpose of establishing the "noisiness" or "noise quality" of a resistor in order to determine its suitability for use in electronic circuits having critical noise requirements. This method is intended as a standard reference for the...

DSF/ISO/FDIS 9296 - Acoustics – Declared noise emission values of information technology and telecommunications equipment
DS

This International Standard applies to information technology and telecommunications equipment. This International Standard specifies: ¾ the method for determining the mean A-weighted sound power level, LWA,m for a batch of machines, ¾ the method for determining the mean A-weighted emission sound...

BS 848-7 - Fans for general purposes - Part 7: Specifications for balancing and vibration
May 14, 2003 - BSI

This International Standard gives specifications for vibration and balance limits of fans for all applications except those designed solely for air circulation, for example, ceiling fans and table fans. However, it is limited to fans of all types installed with a power of less than 300 kW or to a...

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