ACOUSTICAL STANDARDS NEWS

Accredited Standards Committees S1, Acoustics; S2, Mechanical Vibration and Shock; S3, Bioacoustics; S3/SC 1, Animal Bioacoustics; and S12, Noise; the U.S. Technical Advisory Groups to IEC/TC 29, ISO/TC 43, ISO/TC 43/SC 1, ISO/TC 43/SC 3, ISO/TC 108 and its four Subcommittees, and ASACOS and the Standards Plenary Group will meet in conjunction with the 175th Meeting of the Acoustical Society of America in Minneapolis, MN, May 7–11, 2018. ASACOS will also meet in conjunction with the ASA Fall 2017 meeting in New Orleans, LA, December 4–8, 2017.

Gaithersburg, Maryland, USA

• 11–15 September 2017

- ISO/TC 108 Mechanical Vibration, Shock and Condition Monitoring

- ISO/TC 108/SC 6 Vibration and Shock Generating Systems

Rome, Italy

• 18–22 September 2017

– ISO/TC 108/SC 4 Human Exposure to Mechanical Vibration and Shock

London, UK

• 25–29 September 2017

– ISO/TC 108/SC 2 Use and Calibration of Vibration and Shock Measuring Instruments

Falmouth, Massachusetts, USA

• 10–13 October 2017

– ISO/TC 43/SC 3 Underwater Acoustics

For additional information on these meetings, please contact the Standards Secretariat.

Thanks to our Volunteers!

The ASA Standards Secretariat would like to thank the following people for volunteering their time and expertise to coordinate comments and formulate recommendations for the U.S. vote on numerous ISO and IEC documents throughout the first half of the year. Their efforts are greatly appreciated and extremely valuable. The following is a list of volunteers through the end of June 2017.

(Partially derived from ANSI Standards Action, with appreciation)

American National Standards Call for Comment on Proposals Listed

This section solicits comments on proposed new American National Standards and on proposals to revise, reaffirm, or withdrawal approval of existing standards. The dates listed in parenthesis are for information only.

ASA (ASC S12) (Acoustical Society of America)

New National Adoption

BSR ASA S12.55 Amd.1-201x/ISO 3745-201x Amd.1-201x, Acoustics—Determination of Sound Power Levels and Sound Energy Levels of Noise Sources Using Sound Pressure—Precision Methods for Anechoic Rooms and Hemi-Anechoic Rooms—Amendment 1 (a nationally adopted international standard amendment) (identical national adoption of ISO 3745 Amd.1:2017)

This is the national adoption of a recent amendment to an ISO standard that was nationally adopted several years ago. (August 21, 2017)

Reaffirmations

BSR/ASA S12.9-2007/Part 5 (R201x), Quantities and Procedures for Description and Measurement of Environmental Sound—Part 5: Sound Level Descriptors for Determination of Compatible Land Use (reaffirmation of ANSI/ASA S12.9-2007/Part 5 (R2012))

Provides guidance on the compatibility of various human uses of land with the acoustical environment, using the yearly average total day-night adjusted sound exposure or the yearly average adjusted day-night average sound level to characterize the acoustical environment. An informative annex provides guidance to local authorities for designation of land uses compatible with existing or predicted yearly average total day-night adjusted sound exposure or yearly average adjusted day-night average sound level. (September 11, 2017)

BSR/ASA S12.12-1992 (R201x), Engineering Method for the Determination of Sound Power Levels of Noise Sources Using Sound Intensity (reaffirmation of ANSI/ASA S12.12-1992 (R2012))

Describes a method for in situ determination of the sound power level of noise sources in indoor or outdoor environments using sound intensity measurements. Contains information on instrumentation, installation and operation of the source, procedures for the selection of a measurement surface, methods for the sampling of sound intensity on the measurement surface, procedures for the calculation of sound power level, and techniques that can be used to quality the measurement environment. (September 11, 2017)

BSR/ASA S12.43-1997 (R201x), Methods for Measurement of Sound Emitted by Machinery and Equipment at Workstations and Other Specified Positions (reaffirmation of ANSI/ASA S12.43-1997 (R2012))

Specifies three methods for measuring sound-pressure levels from machinery and equipment, at a workstation and at other specified positions nearby, differentiated primarily by the acoustical environment in which they are made. Measurements by: Method A in an essentially free field over a reflecting plane; Method B in any environment that meets certain qualification requirements specified; Method C in a semi-reverberant field for which the accuracy implied by measurements under Method A or B is not required. (September 11, 2017)

BSR/ASA S12.44-1997 (R201x), Standard Methods for Calculation of Sound Emitted by Machinery and Equipment at Workstations and Other Specified Positions from Sound Power Level (reaffirmation of ANSI/ASA S12.44-1997 (R2012))

Provides a method for determining emission sound pressure levels from the sound power level produced by all types of machinery and equipment at workstations and other specified locations. These sound pressure levels are, in general, less than those that would be measured when the machinery or equipment is operating in its normal surroundings where the environment may influence the measurement of an emission sound pressure level. (September 11, 2017)

BSR/ASA S12.50-2002/ISO 3740-2000 (R201x), Acoustics—Determination of Sound Power Levels of Noise Sources—Guidelines for the Use of Basic Standards (reaffirmation of ANSI/ASA S12.50-2002/ISO 3740-2000 (R2012))

Gives guidance for the use of a series of nine International Standards describing various methods for determining sound power levels from all types of machinery and equipment. Provides brief summaries of these basic International Standards; guidance on selection of one or more of these standards. Applies only to airborne sound. For use in preparation of noise test codes (ISO 12001) and noise testing where no specific noise test code exists. (September 11, 2017)

BSR ASA S12.55-2012, ISO 3745:2012 (R201x), Acoustics—Determination of Sound Power Levels and Sound Energy Levels of Noise Sources Using Sound Pressure—Precision Methods for Anechoic Rooms and Hemi-Anechoic Rooms (a nationally adopted international standard) (reaffirmation of ANSI ASA S12.55-2012, ISO 3745:2012)

This Nationally Adopted International Standard specifies methods for measuring the sound pressure levels on a measurement surface enveloping a noise source (machinery or equipment) in an anechoic room or a hemianechoic room. (August 21, 2017)

BSR ASA S12.58-2012 (R201x), Sound Power Level Determination for Sources Using a Single-Source Position (reaffirmation of ANSI ASA S12.58-2012)

Describes a method for determining sound power levels of noise sources that emit broadband sound and/or discrete frequency sounds/tones using reverberation rooms. Applies when it is undesirable or unfeasible to move the source to decrease uncertainty of measurement. Described method requires reverberation room pre-qualification through test and requires use of comparison method to determine sound power levels. Specifies environment, procedures and equipment used to qualify the room by test. (August 21, 2017)

BSR/ASA S12.62-2012/ISO 9613-2:1996 (MOD) (R201x), Acoustics—Attenuation of Sound During Propagation Outdoors—Part 2: General Method of Calculation (a modified nationally adopted international standard) (reaffirmation of ANSI/ASA S12.62-2012/ISO 9613-2:1996 (MOD))

This modified Nationally Adopted International Standard specifies an engineering method for calculating the attenuation of sound during propagation outdoors in order to predict the levels of environmental noise at a distance from a variety of sources. The method predicts the equivalent continuous A-weighted sound pressure level (as described in parts 1 to 3 of ISO 1996) under meteorological conditions favorable to propagation from sources of known sound emission. (September 11, 2017)

BSR/ASA S12.68-2007 (R201x), Methods of Estimating Effective A-Weighted Sound Pressure Levels When Hearing Protectors Are Worn (reaffirmation of ANSI/ASA S12.68-2007 (R2012))

Specifies three methods, in ascending order of complexity of use and potential accuracy, for estimation of sound pressure levels that are effective when a hearing protector is worn: (1) Noise Level Reduction Statistic for use with A-weighting (NRSA), (2) Noise Level Reduction Statistic, Graphical (NRSG), and (3) the octave-band method. Also specifies, in the case of NRSA and NRSG, that values will be presented for both 80th and 20th percentiles to reflect the range of attenuation that can be anticipated. (September 11, 2017)

ASA (ASC S2) (Acoustical Society of America)

Reaffirmations

BSR ASA S2.21-1998 (R201x), Method for Preparation of a Standard Material for Dynamic Mechanical Measurements (reaffirmation of ANSI ASA S2.21-1998 (R2012))

Applies to the preparation of a standard material for calibration of instruments for measuring the dynamic mechanical properties of viscoelastic materials. The purpose of this Standard is to assist users of dynamic mechanical test equipment in preparing the standard material from its basic components. The standard material is used for the calibration of new instruments in comparison with other instruments and in checking the operation of the same instrument at different times. (August 21, 2017)

BSR ASA S2.22-1998 (R201x), Resonance Method for Measuring the Dynamic Mechanical Properties of Viscoelastic Materials (reaffirmation of ANSI ASA S2.22-1998 (R2012))

Defines a procedure for measurement and analysis of the dynamic properties of viscoelastic materials using a resonance method. The Standard applies to materials used in sound and vibration damping systems operating at frequencies from a fraction of a Hertz to about 20 kHz. (August 21, 2017)

BSR ASA S2.23-1998 (R201x), Single Cantilever Beam Method for Measuring the Dynamic Mechanical Properties of Viscoelastic Materials (reaffirmation of ANSI ASA S2.23-1998 (R2012))

Defines a method for measuring the dynamic mechanical properties of viscoelastic materials using a cantilever beam technique. The dynamic mechanical properties are expressed in terms of the frequency dependence of Young's modulus and loss factor at a given reference temperature. The Standard provides information for constructing such equipment and analyzing the results obtained. (August 21, 2017)

BSR ASA S2.72-2003/Part 4 (R201x)/ISO 2631-4-2001 (R201x), Mechanical Vibration and Shock—Evaluation of Human Exposure to Whole-Body Vibration—Part 4: Guidelines for the Evaluation of the Effects of Vibration and Rotational Motion on Passenger and Crew Comfort in Fixed-Guideway Transport Systems (reaffirmation of ANSI ASA S2.72-2003/Part 4 (R2012)/ISO 2631-4-2001 (R2012))

For design and evaluation of fixed-guideway passenger systems with regard to impact of vibration and repetitive motions on passenger comfort. Fixed-guideway vehicles provide predictable, complex multi-axis motion environment that is a function of the guideway, vehicle and seat or berth. Passengers evaluate ride comfort not only based on motion but also on expectations regarding the class of service purchased. Passengers judge comfort based on interaction of vibration with acoustic noise, etc. (September 11, 2017)

BSR/ASA S2.72-2002/Part 1 (R201x)/ISO 2631-1-1997 (R201x), Mechanical Vibration and Shock—Evaluation of Human Exposure to Whole-Body Vibration—Part 1: General Requirements (a nationally adopted international standard) (reaffirmation of ANSI/ASA S2.72-2002/Part 1 (R2012)/ISO 2631-1-1997 (R2012))

Defines methods for measurement of periodic, random, and transient whole-body vibration. Indicates the principal factors that combine to determine degree to which a vibration exposure will be acceptable. Informative annexes indicate current opinion and provide guidance on possible effects of vibration on health, comfort and perception, and motion sickness. The frequency range considered is 0.5 to 80 Hz for health, comfort, and perception and 0.1 to 0.5 Hz for motion sickness. (September 11, 2017)

BSR/ASA S2.72/Part 1 Amd. 1-2010/ISO 2631-1 Amd. 1:2010 (R201x), Mechanical Vibration and Shock—Evaluation of Human Exposure to Whole-Body Vibration—Part 1: General Requirements—Amendment 1 (a nationally adopted international standard amendment) (reaffirmation of ANSI/ASA S2.72-2002/Part 1 (R2012) ISO 2631-1-1997 (R2012))

This amendment to ANSI/ASA S2.72-2002/Part 1/ISO 2631-1:1997 provides numerous updates and corrections throughout the document. (September 11, 2017)

BSR/ASA S2.72/Part 4 Amd. 1-2010/ISO 2631-4 Amd. 1:2010 (R201x), Mechanical Vibration and Shock-Evaluation of Human Exposure to Whole-Body Vibration—Part 4: Guidelines for the Evaluation of the Effects of Vibration and Rotational Motion on Passenger and Crew Comfort in Fixed-Guideway Transport Systems, Amendment 1 (a Nationally Adopted International Standard Amendment) (reaffirmation of ANSI/ASA S2.72 -2002/Part 1 (R2012) ISO 2631-1-1997 (R2012))

This amendment to ANSI/ASA S2.72-2003/Part 4/ISO 2631-4:2001 (R2007) incorporates a new Annex B, Statistical analysis method. This annex cancels and replaces ISO 10056:2001 Mechanical Vibration—Measurement and Analysis of Whole-Body Vibration to which Passengers and Crew are Exposed in Railway Vehicles. (September 11, 2017)

ASHRAE (American Society of Heating, Refrigerating and Air-Conditioning Engineers, Inc.)

Addenda

BSR/ASHRAE Addendum b to BSR/ASHRAE Standard 147-201x, Reducing the Release of Halogenated Refrigerants from Refrigerating and Air-Conditioning Equipment and Systems (addenda to ANSI/ASHRAE Standard 147-2013)

This addendum makes changes to Appendix A, Section 2.2.1.1. These changes place more specificity on the issues with the causes of refrigerant leaks in systems due to vibration. It also identifies two different remedies to vibration issues. (September 17, 2017)

BSR/ASHRAE Addendum c to BSR/ASHRAE Standard 147-201x, Reducing the Release of Halogenated Refrigerants from Refrigerating and Air-Conditioning Equipment and Systems (addenda to ANSI/ASHRAE Standard 147-2013)

This addendum addresses needed guidance for Informative Appendix A relative to Vibration [Section A2.2.3.1] and Water Treatment [Section A2.2.3.2]. These are informative in nature. (September 17, 2017).

ATIS (Alliance for Telecommunications Industry Solutions)

Revision

BSR/ATIS 0600005-201x, Acoustic Measurement (revision of ANSI/ATIS 0600005-2006 (R2011))

Acoustic noise from telecom equipment adds to regulated environmental noise. This standard provides measurement methods for acoustic noise that are accurate and repeatable. Emission limits are set in units of sound power for equipment installed in temperature-controlled environments. (August 28, 2017)

IEEE (Institute of Electrical and Electronics Engineers)

New Standard

BSR/IEEE 430-201x, Standard Procedures for the Measurement of Radio Noise from Overhead Power Lines and Substations (new standard)

This standard establishes uniform procedures for the measurement of radio noise generated by corona from overhead power lines and substations. Measurement procedures in this standard are also valid for other power-line noise sources such as gaps and harmonics; however, most of the precautionary information, analysis, and data plotting techniques were written and developed primarily for corona discharges. The procedures are not valid for measuring transient radio noise sources that occur during breaker or disconnect switching operations. (September 12, 2017)

TIA (Telecommunications Industry Association)

New Standard

BSR/TIA 5050-201x, Telecommunications, Communications Products, Receive Volume Control Requirements for Wireless (Mobile) Devices (new standard)

This Standard establishes receive volume control requirements and testing methods for narrowband, wideband, super-wideband, and fullband wireless (mobile) handsets. Current volume control requirements for these devices are included in different standards documents with different requirements. The method in this standard uses conversational gain, the acoustic output signal from a device relative to the signal level that would be present in a face-to-face conversation at a distance of 1 meter. (October 9, 2017)

Project Initiation Notification System (PINS)

ANSI Procedures require notification of ANSI by ANSI-accredited standards developers of the initiation and scope of activities expected to result in new or revised American National Standards. This information is a key element in planning and coordinating American National Standards. The following is a list of proposed new American National Standards or revisions to existing American National Standards that have been received from ANSI-accredited standards developers that utilize the periodic maintenance option in connection with their standards.

TIA (Telecommunications Industry Association)

BSR/TIA 470.140-201x, Acoustic Echo Control Requirements for Analog Telephones (new standard)

If analog telephones exhibit delays in the acoustic path, acoustic echo control (AEC) is required to prevent far-end talker echo. Project Need: Create new standard. Stakeholders: Analog telephone users and manufacturers.

Final Actions on American National Standards

The standards actions listed below have been approved by the ANSI Board of Standards Review (BSR) or by an ANSI-Audited Designator, as applicable. Technical Reports have been registered in accordance with ANSI's Procedures for the Registration of Technical Reports with ANSI.

ASA (ASC S3) (Acoustical Society of America)

Reaffirmation

ANSI/ASA S3.4-2007 (R2017), Procedure for the Computation of Loudness of Steady Sounds (reaffirmation of ANSI/ASA S3.4-2007 (R2012))

ANSI/ASA S3.5-1997 (R2017), Methods for Calculation of the Speech Intelligibility Index (reaffirmation of ANSI/ASA S3.5-1997 (R2012))

ANSI/ASA S3.37-1987 (R2017), Preferred Earhook Nozzle Thread for Postauricular Hearing Aids (reaffirmation of ANSI/ASA S3.37-1987 (R2012))

ANSI/ASA S3.42-1992/Part 1 (R2017), Testing Hearing Aids with a Broadband Noise Signal (reaffirmation of ANSI/ASA S3.42-1992/Part 1 (R2012)):

AWEA (American Wind Energy Association)

New National Adoption

ANSI/AWEA 61400-11-2017, Wind Turbine Generator Systems: Acoustic Noise Measurement Techniques (identical national adoption of IEC 61400-11 Ed.3): 8/2018/2017

ANSI/AWEA 61400-13-2017, Wind Turbines—Measurement of Mechanical Loads (identical national adoption of IEC 61400-13 Ed. 1): 8/18/2017

ANSI/AWEA 61400-23-2017, Full Scale Structural Testing of Rotor Blades (identical national adoption of IEC 61400-23:2014): 8/21/2017

(Derived from ANSI Standards Action, with appreciation.)

Newly Published ISO and IEC Standards

Listed here are new and revised standards recently approved and promulgated by ISO - the International Organization for Standardization and IEC – the International Electrotechnical Commission.

ISO Standards

ACOUSTICS (TC 43)

ISO 532-2:2017, Acoustics—Methods for calculating loudness—Part 2: Moore-Glasberg method

ISO 1996-2:2017, Acoustics—Description, measurement and assessment of environmental noise—Part 2: Determination of sound pressure levels

ISO 9296:2017, Acoustics—Declared noise emission values of information technology and telecommunications equipment

ISO 12354-1:2017, Building acoustics—Estimation of acoustic performance of buildings from the performance of elements—Part 1: Airborne sound insulation between rooms

ISO 12354-2:2017, Building acoustics—Estimation of acoustic performance of buildings from the performance of elements—Part 2: Impact sound insulation between rooms

ISO 12354-3:2017, Building acoustics—Estimation of acoustic performance of buildings from the performance of elements—Part 3: Airborne sound insulation against outdoor sound

ISO 12354-4:2017, Building acoustics—Estimation of acoustic performance of buildings from the performance of elements—Part 4: Transmission of indoor sound to the outside

COMPRESSORS, PNEUMATIC TOOLS AND PNEUMATIC MACHINES (TC 118)

ISO 28927-2/Amd1:2017, Hand-held portable power tools—Test methods for evaluation of vibration emission—Part 11: Stone hammers—Amendment 1: Changes in Annex C—Brake devices

ISO 28927-4/Amd1:2017, Hand-held portable power tools—Test methods for evaluation of vibration emission—Part 11: Stone hammers—Amendment 1: Cupped wire brushes

INTERNAL COMBUSTION ENGINES (TC 70)

ISO 8528-9:2017, Reciprocating internal combustion engine driven alternating current generating sets—Part 9: Measurement and evaluation of mechanical vibrations

MECHANICAL VIBRATION AND SHOCK (TC 108)

ISO 7919-4/Amd1:2017, Mechanical vibration—Evaluation of machine vibration by measurements on rotating shafts—Part 4: Gas turbine sets with fluid-film bearings—Amendment 1

ISO 10816-3/Amd1:2017, Mechanical vibration—Evaluation of machine vibration by measurements on non-rotating parts—Part 3: Industrial machines with nominal power above 15 kW and nominal speeds between 120 r/min and 15 000 r/min when measured in situ—Amendment 1

ISO 10816-4/Amd1:2017, Mechanical vibration—Evaluation of machine vibration by measurements on non-rotating parts—Part 4: Gas turbine sets with fluid-film bearings—Amendment 1

ISO 13373-7:2017, Condition monitoring and diagnostics of machines—Vibration condition monitoring—Part 7: Diagnostic techniques for machine sets in hydraulic power generating and pump-storage plants

ISO 20816-2:2017, Mechanical vibration—Measurement and evaluation of machine vibration—Part 2: Land-based gas turbines, steam turbines and generators in excess of 40 MW, with fluid-film bearings and rated speeds of 1 500 r/min, 1 800 r/min, 3000 r/min and 3600 r/min

ROLLING BEARINGS (TC 4)

ISO 15242-3:2017, Rolling bearings—Measuring methods for vibration—Part 3: Radial spherical and tapered roller bearings with cylindrical bore and outside surface

SHIPS AND MARINE TECHNOLOGY (TC 8)

ISO 20155:2017, Ships and marine technology—Test method of flow induced in-pipe noise source characteristics for a ship-used pump

ISO Technical Reports

MACHINE TOOLS (TC 39)

ISO/TR 17243-2:2017, Machine tool spindles—Evaluation of spindle vibrations by measurements on non-rotating parts—Part 2: Direct-driven spindles and belt-driven spindles with rolling element bearings operating at speeds between 600 r/min and 30 000 r/min

MECHANICAL VIBRATION AND SHOCK (TC 108)

ISO/TR 18570:2017, Mechanical vibration—Measurement and evaluation of human exposure to hand transmitted vibration—Supplementary method for assessing risk of vascular disorders

IEC Standards

ULTRASONICS (TC 87)

IEC 61391-1 Ed. 1.1 en:2017, Ultrasonics—Pulse-echo scanners—Part 1: Techniques for calibrating spatial measurement systems and measurement of point-spread function response

IEC 61391-1 Amd.1 Ed. 1.0 en:2017, Amendment 1—Ultrasonics—Pulse-echo scanners—Part 1: Techniques for calibrating spatial measurement systems and measurement of point-spread function response

Draft International Standards

This section lists proposed standards that the International Organization for Standardization (ISO) and the International Electrotechnical Commission (IEC) are considering for approval. The proposals have received substantial support within the technical committees or subcommittees that developed them and are now being circulated to ISO and IEC members for comment and vote. Standards Action readers interested in reviewing and commenting on these documents should order copies from ANSI.

ISO Drafts

ACOUSTICS (TC 43)

ISO/DIS 3740, Acoustics—Determination of sound power levels of noise sources—Guidelines for the use of basic standards—10/2/2017

ISO/DIS 11654, Acoustics—Sound absorbers—Rating of sound absorption coefficients—10/28/2017

ISO/DIS 13473-1, Characterization of pavement texture by use of surface profiles—Part 1: Determination of mean profile depth—10/2/2017

ISO/DIS 16283-2, Acoustics—Field measurement of sound insulation in buildings and of building elements—Part 2: Impact sound insulation—9/20/2017

ISO/DIS 17201-1, Acoustics—Noise from shooting ranges—Part 1: Determination of muzzle blast by measurement—9/8/2017

ISO/DIS 19488, Acoustics—Acoustic classification of dwellings—10/7/2017

ISO/DIS 20189, Acoustics—Screens furniture and single objects intended for interior use—Rating of sound absorption and sound reduction of elements based on laboratory measurements—10/28/2017

FLUID POWER SYSTEMS (TC 131)

ISO/DIS 20145, Pneumatic fluid power—Test methods for measuring acoustic emission pressure levels of exhaust silencers—7/12/2017

GAS TURBINES (TC 192)

ISO/DIS 10494, Turbines and turbine sets—Measurement of emitted airborne noise—Engineering/survey method—9/7/2017

MECHANICAL VIBRATION AND SHOCK (TC 108)

ISO/DIS 2631-5, Mechanical vibration and shock—Evaluation of human exposure to whole-body vibration—Part 5: Method for evaluation of vibration containing multiple shocks—8/31/2017

ISO 10819/DAmd1, Mechanical vibration and shock—Hand-arm vibration—Measurement and evaluation of the vibration transmissibility of gloves at the palm of the hand—Amendment 1—9/20/2017

NON-DESTRUCTIVE TESTING (TC 135)

ISO/DIS 16836, Non-destructive testing—Acoustic emission testing—Measurement method for acoustic emission signals in concrete—8/6/2017

ISO/DIS 16837, Non-destructive testing—Acoustic emission inspection—Test method for damage qualification of reinforced concrete beams—8/6/2017

ISO/DIS 16838, Non-destructive testing—Acoustic emission inspection—Test method for classification of active cracks in concrete structures—8/6/2017

QUANTITIES, UNITS, SYMBOLS, CONVERSION FACTORS (TC 12)

ISO/DIS 80000-8, Quantities and units—Part 8: Acoustics—10/5/2017

IEC Drafts

5/190/CDV, ISO 10494 ED1: Turbines and turbine sets—Measurement of emitted airborne noise—Engineering/survey method, 2017/11/3

25/598/CDV, ISO 80000-8 ED1: Quantities and units—Part 8: Acoustics, 2017/10/2

29/955/CDV, IEC 62489-1/AMD2 ED1: Amendment 2—Electroacoustics—Audio-frequency induction loop systems for assisted hearing—Part 1: Methods of measuring and specifying the performance of system components, 2017/9/15

87/661/FDIS, IEC 62359/AMD1 ED2: Amendment 1—Ultrasonics—Field characterization—Test methods for the determination of thermal and mechanical indices related to medical diagnostic ultrasonic fields, 2017/8/25

87/662/CD, IEC 60050-801/AMD1 ED2: Amendment 1—International Electrotechnical Vocabulary—Chapter 801: Acoustics and electroacoustics, Section 32—Underwater acoustics, 2017/10/1

100/2957/CDV, IEC 60268-21 ED1: Sound system equipment—Loudspeakers—Acoustical (output based) measurements, 2017/11/3

100/2960/CDV, IEC 60268-3 ED5: Sound system equipment—Part 3: Amplifiers, 2017/11/1