IEEE 85-1973
Withdrawn
A Withdrawn Standard is one, which is removed from sale, and its unique number can no longer be used. The Standard can be withdrawn and not replaced, or it can be withdrawn and replaced by a Standard with a different number.
IEEE Test Procedure for Airborne Sound Measurements on Rotating Electric Machinery
08-05-1996
08-29-1980
1 Scope
2 Definitions and terms
2.1 Sound pressure level
2.2 A-weighted sound level
2.3 Octave band level
2.4 Sound power level
2.5 A-weighted sound power level
2.6 Prescribed surface
2.7 Equivalent radius
2.8 Reference distance
2.9 Reference radius
2.10 Background level
2.11 Mean sound pressure level or mean sound level
2.12 Machine
2.12.1 Small machine
2.12.2 Medium machine
2.12.3 Large machine
3 Installation and operation
3.1 Machine mounting
3.1.1 Field installation
3.1.2 Test mounting
3.1.3 Multiunit machines
3.2 Operating condition
3.2.1 No-load test
3.2.2 Full-load test
4 Measuring instruments
4.1 Sound level meter
4.2 Band filter networks
4.3 Level recorder
4.4 Sound measuring systems
4.4.1 Microphone
4.4.2 Interconnecting cable
4.4.3 Microphone signal amplifier
4.4.4 Frequency analyzer
4.5 Calibration
4.6 System check out
4.7 Electrical characteristic measurement
instrumentation
5 Test environment
5.1 Free field over a reflecting plane
5.1.1 Free-field conditions in a test room
5.1.2 Other free-field situations
5.2 Reverberant field
5.3 Semireverberant field
5.4 Test to determine type of environment
5.5 Background level
6 Quantities to be reported
6.1 Standard
6.2 Additional
7 Methods of measurement
7.1 Free field over a reflecting plane
7.1.1 Location of measurement points
7.1.1.1 Small machines
7.1.1.2 Medium machines
7.1.1.3 Large machines
7.1.2 Test procedure
7.1.3 Measurement corrections
7.1.4 Calculation of the mean level
7.1.5 Calculation of A-weighted mean sound level
using octave band mean sound pressure levels
7.1.6 Calculation of the A-weighted mean sound level
at a reference distance for the condition of a
free field over a reflecting plane
7.1.7 Calculation of the A-weighted sound power level
7.1.8 Calculation of the octave band sound pressure
level at the reference distance for the
condition of a free field over a reflecting
plane
7.2 Reverberant field
7.2.1 Reference sound source
7.2.2 Location of measurement points
7.2.3 Test procedure
7.2.4 Measurement corrections
7.2.5 Calculation of mean level
7.2.6 Calculation of the sound power level in octave
bands
7.2.7 Calculation of the mean sound pressure levels
in octave bands at the reference distance for
the conditions of a free field over a
reflecting plane
7.2.8 Calculation of the A-weighted mean sound level
at a reference distance for the condition of a
free field over a reflecting plane
7.2.9 Calculation of A-weighted sound power level
7.3 Semireverberant field
7.3.1 Reference sound source
7.3.2 Location of measurement points
7.3.3 Test procedure
7.3.4 Measurement corrections
7.3.5 Calculation of the mean level
7.3.6 Calculation of the sound power level in octave
bands
7.3.7 Calculation of the mean sound pressure levels
in octave bands at the reference distance for
conditions of a free field over a reflecting
plane
7.3.8 Calculation of the A-weighted mean sound level
at the reference distance for the condition of
a free field over a reflecting plane
7.3.9 Calculation of A-weighted sound power level
8 Test report
Tables
1 Preferred frequencies for acoustical
measurements
2 Corrections to be applied to obtain A-weighting
Figures
1(A) Prescribed points, small machines
1(B) Six-point hemisphere, small machines
2(A) Prescribed points, medium machines
2(B) Twelve-point hemisphere, medium machines
3 Prescribed points, large horizontal machines
4 Prescribed points, large vertical machines
Covers approved methods for reporting results and conducting tests to effect the uniform determination of rotating electric machine sound under steady-state conditions with an accuracy of 3dB tested in the following acoustical environments: free field, reverberant field, semireverberant field.
Committee |
Electric Machinery
|
DocumentType |
Standard
|
PublisherName |
Institute of Electrical & Electronics Engineers
|
Status |
Withdrawn
|
IEEE 252-2022 | IEEE Standard Test Procedure for Polyphase Induction Motors Having Liquid in the Magnetic Gap |
IEEE 112-1996 | IEEE Standard Test Procedure for Polyphase Induction Motors and Generators |
IEEE 113-1985 | IEEE Guide: Test Procedures for Direct-Current Machines |
06/19982093 DC : DRAFT AUG 2006 | |
NEMA MG 3-1974 (R1995, R2000, R2006, R2012, R2014, R2021) | Sound Level Prediction for Installed Rotating Electrical Machines |
IEEE C57.12.11-1980 | IEEE Guide for Installation of Oil-Immersed Transformers (10 MVA and Larger, 69-287 kV Rating) |
IEEE 252 : 1995 | TEST PROCEDURE FOR POLYPHASE INDUCTION MOTORS HAVING LIQUID IN THE MAGNETIC GAP |
IEEE 115-2009 REDLINE | IEEE Guide for Test Procedures for Synchronous Machines Part I—Acceptance and Performance Testing Part II—Test Procedures and Parameter Determination for Dynamic Analysis |
IEEE 115-2019 | IEEE Guide for Test Procedures for Synchronous Machines Including Acceptance and Performance Testing and Parameter Determination for Dynamic Analysis |
IEEE 251-1984 | IEEE Guide: Test Procedures for Direct-Current Tachometer Generators |
IEEE 114-2010 | IEEE Standard Test Procedure for Single-Phase Induction Motors |
ANSI S1.4 : 1983 | SPECIFICATION FOR SOUND LEVEL METERS |
ANSI S1.11 : 2014 | SPECIFICATION FOR OCTAVE-BAND AND FRACTIONAL-OCTAVE-BAND ANALOG AND DIGITAL FILTERS |
ANSI/ASA S1.8 : 2016 | REFERENCE VALUES FOR LEVELS USED IN ACOUSTICS AND VIBRATIONS |
ANSI S1.12 : 67(R1997) | LABORATORY STANDARD MICROPHONES, SPECIFICATIONS FOR, |
Access your standards online with a subscription
Features
-
Simple online access to standards, technical information and regulations.
-
Critical updates of standards and customisable alerts and notifications.
-
Multi-user online standards collection: secure, flexible and cost effective.