ASTM F1334-2002 Standard Test Method for Determining A-Weighted Sound Power Level of Vacuum Cleaners《测定真空吸尘器A-加重声音功率级的标准试验方法》.pdf

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1、Designation: F 1334 02An American National StandardStandard Test Method forDetermining A-Weighted Sound Power Level of VacuumCleaners1This standard is issued under the fixed designation F 1334; the number immediately following the designation indicates the year oforiginal adoption or, in the case of

2、 revision, the year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon (e) indicates an editorial change since the last revision or reapproval.1. Scope1.1 This test method calculates the overall A-weightedsound power level emitted by small portable

3、upright, canister,combination vacuum cleaners, and central vacuum cleanermotorized nozzles intended for operation in domestic andcommercial applications.1.2 A-weighted sound pressure measurements are per-formed on a stationary vacuum cleaner in a semi-reverberantroom. This test method determines sou

4、nd power by a compari-son method for small noise sources, that is, comparison to abroadband reference sound source.1.3 This test method describes a procedure for determiningthe approximate A-weighted sound power level of small noisesources. This test method uses a non-special semi-reverberantroom.1.

5、4 Results are expressed as A-weighted sound power levelin decibels.1.5 The values stated in inch-pound units are to be regardedas the standard. The values in parentheses are for informationonly.1.6 This standard does not purport to address all of thesafety concerns, if any, associated with its use.

6、It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2. Referenced Documents2.1 ASTM Standards:2C 634 Terminology Relating to Environmental AcousticsE 177 Practice for Use of

7、 the Terms Precision and Bias inASTM Test MethodsE 691 Practice for Conducting an Interlaboratory Study toDetermine the Precision of a Test MethodF 608 Test Method for Evaluation of Carpet Embedded DirtRemoval Effectiveness of Household/Commercial VacuumCleanersF 655 Specification for Test Carpets a

8、nd Pads for VacuumCleaner Testing2.2 ANSI Standards:S1.4 Specifications for Sound Level Meters3S1.26 Method for the Calibration of the Absorption ofSound by the Atmosphere3S12.31 Precision Methods for the Determination of SoundPower Levels of Broad Band Noise Sources in Reverber-ant Rooms3S12.32 Pre

9、cision Methods for Determination of SoundPower Levels for Discrete Frequency and Narrow BandNoise Sources in Reverberant Rooms3S12.33 Engineering Methods for Determination of SoundPower Levels of Noise Sources in a Special ReverberantTest Room32.3 ISO Standards3:These standards are similar to and ma

10、y be used in place ofANSI S12.31, S12.32, and S12.33, respectively:3741 AcousticsDetermination of Sound Power Levels ofNoise Sources Using Sound PressurePrecision Methodsfor Reverberation Rooms3742 AcousticsDetermination of Sound Power Levels ofNoise SourcesPrecision Method for Discrete-Frequencyand

11、 Narrow-Band Sources in Reverberation Rooms3743 AcousticsDetermination of Sound Power Levels ofNoise SourcesEngineering Methods for Small, MovableSources in Reverberant Fields2.4 IEC Standard:60704.1 Test Code for the Determination of AirborneAcoustical Noise Emitted by Household and SimilarElectric

12、al Appliances33. Terminology3.1 Definitions:3.1.1 population, nthe total of all of the units of theparticular model and/or type of vacuum cleaner being tested.3.1.2 population sample or sample, nthree or more testunits, randomly taken from the population.1This test method is under the jurisdiction o

13、fASTM Committee F11 on VacuumCleaners and is the direct responsibility of Subcommittee F11.25 on SoundMeasurement.Current edition approved March 10, 2002. Published May 2002. Originallyapproved in 1991. Last previous edition approved in 1997 as F 1334 97.2For referenced ASTM standards, visit the AST

14、M website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.3Available from American National Standards Institute, 11 W. 42nd St., 13thFloor, New York, NY 10036.1Copy

15、right ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.3.1.3 reference sound source, na standard source ofbroadband sound with a certified set of sound power emissions.3.1.4 source, na device that emits sound. This may be thevacuum cleaner or a

16、motorized nozzle.3.1.5 test unit or unit, na single vacuum cleaner or nozzleof the model and/or type being tested.3.1.6 Unless otherwise indicated, definitions are in accor-dance with Terminology C 634.4. Significance and Use4.1 The test results enable the comparison of A-weightedsound emission from

17、 vacuum cleaners when tested under thecondition of this test method.5. Test Room Requirements5.1 The test room shall be semi-reverberant. It shall containsufficiently little sound absorption material so the requirementsof 5.2 can be met. It should be large enough to meet thedimension requirements of

18、 5.2.5.1.1 When a central vacuum cleaner motorized nozzle is tobe tested, the test room should be plumbed for a centralvacuum system according to the manufacturers instructionsusing standard 2.00 inch diameter thin-wall PVC tubing. Asingle wall inlet shall be located in the test room.5.2 Identify a

19、location on the test room floor which canaccommodate six equally spaced microphone positions 60apart located at a height of 60 in. (1.5 m) above the floor on a12 ft (3.6 m) diameter circle the center of which is the centerof the sound source. These positions shall result in a standarddeviation of th

20、e six sound pressure measurements of not morethan 2.3 dB when measuring the reference sound source. Thislocation is suitable for the vacuum cleaner and reference soundsource for this test method. Refer to Figs. 1-4 for typicallayouts.5.3 EnvironmentalAmbient test conditions within the testroom shall

21、 be controlled to within 20 6 4C and 30 to 70 %relative humidity.5.4 Also, any room which has qualified in accordance withANSI S1.26, S12.31, S12.32, S12.33, ISO 3741, 3742 and3743 may be used to measure the sound power levels ofvacuum cleaners.45.5 The measuredA-weighted sound pressure levels shall

22、 becorrected for the influence of background noise according toTable 1. When the steady background-noise sound pressurelevel is more than 6 dB below the sound pressure level at eachmeasurement point, the measured A-weighted sound pressurelevels shall be corrected for the influence of background nois

23、eaccording to Table 1. If this difference is less than 6 dB no4Further information provided in ANSI S1.26 Method for the Calibration of theAbsorption of Sound by the Atmosphere, available from American NationalStandards Institute, 11 W. 42nd St., 13th Floor, New York, NY 10036.FIG. 1 Sound Set UpFIG

24、. 2 Sound Test Pattern for UprightsFIG. 3 Sound Test Pattern for CanistersF1334022correction is allowed and any reported data must include a noteindicating that the background noise requirements of thisstandard were not satisfied.6. Instrumentation and Equipment6.1 Acoustical InstrumentationThe soun

25、d measurementsystem shall be as specified in ANSI S1.4.6.2 Voltage Regulator SystemThe regulator shall be ca-pable of maintaining the vacuum cleaners rated voltage(61 %) and frequency (61 Hz) having a waveform that isessentially sinusoidal with 3% maximum harmonic distortionfor the duration of the t

26、est.6.3 Test Carpet and PadThe test carpet and pad shall be54 in. wide (137 cm) and 72 in. (183 cm) long. The carpet shallbe multilevel. Carpet and pad shall be as specified in Specifi-cation F 655.NOTE 1For this test method two standard size 27 by 72-in. (69 by183-cm) long test carpets could be pla

27、ced side by side to make it 54 by72-in. (138 by 183-cm) long. It is recommended that the two pieces of testcarpet be taped to the floor, side by side with the pile running in the samedirection.6.4 Reference Sound SourceThe reference sound sourceshall meet the requirements of Section 9 of ANSI S12.31

28、.6.5 Instrumentation:6.5.1 Thermometer, accurate to within 62C.6.5.2 A means of measuring relative humidity, accurate towithin 62 % over the range used.6.5.3 Barometer, accurate to within 62%.7. Operation of Vacuum Cleaner7.1 Run-InOperate new test cleaners continuously for atleast 1 h prior to test

29、ing. Canister cleaners shall be run openwith no hose attached. Upright and power nozzles shall be runso that the rotating brush does not engage the carpet or thefloor.7.2 Warm-UpOperate the cleaners for 10 min just prior tomaking sound pressure level measurements in the same con-figuration as descri

30、bed in 7.1.7.3 Test Configuration:7.3.1 The vacuum cleaner shall be configured for the carpetcleaning mode.7.3.2 The dust bag or primary filter shall be new.7.3.3 All belts shall be new at the start of the run-in.7.3.4 Rotating agitator type cleaner including power nozzleshall use the same setting a

31、s specified in Method F 608 forcleaning multilevel carpet which is as follows:7.3.4.1 If various settings are provided, set the motor speedsetting, suction regulator, or nozzle height, or combinationthereof, using the manufacturers specified setting for cleaningmultilevel carpet. Momentary or instan

32、taneous speeds are notto be used.7.3.5 For straight air canister cleaners use the same settingspecified in Method F 608 for cleaning multilevel carpet,which is as follows:7.3.5.1 If various settings are provided, set the motorsetting, suction regulator, or nozzle height, or combinationthereof, using

33、 the manufacturers specific setting for cleaningmultilevel carpet. If no specific instructions are given, or ifjudged to be inadequate or unclear, position the nozzle on thecarpet so the maximum suction is provided, taking care tomaintain the tilt angle throughout the test. Momentary orinstantaneous

34、 speeds are not to be used.7.3.6 VoltageTests are to be conducted at the nameplatevoltage (61 %) and frequency (61 Hz) throughout the test.For cleaners with dual nameplate voltage ratings, conductsound tests at the highest voltage.7.3.7 Central Vacuum Power UnitThe central vacuumpower unit shall be

35、remotely located (outside the semi-reverberate room) so that the noise levels generated by thepower unit do not affect the test results of the central vacuum(motorized or straight air) nozzle being tested.8. Location of Sound Sources and Equipment8.1 Carpet and PadLay the carpet and pad on the floor

36、with the geometric center of the carpet directly over the centerof the circle defined in 5.2.8.2 Locate the vacuum cleaner or the reference soundsource at the position determined in 5.2.All modules (generallythe motor/blower and its housing in the base of an upright unit,or in the canister of a cani

37、ster unit) shall be adequately securedin a manner which will not affect the sound pressure readings.8.2.1 Reference Sound Source LocationPosition the cen-ter of the radiating portion (fan blades, for an aerodynamicsource) over the location defined above. The reference soundsource is placed directly

38、on the carpet.8.2.2 Vacuum Cleaner Location:FIG. 4 Sound Test Pattern for CV AccessoriesTABLE 1 Corrections for Background Noise LevelsDifference Between Sound PressureLevel Measured with Sound Source Operatingand Background NoiseLevel Alone, dBCorrection to be Subtractedfrom Sound Pressure LevelMea

39、sured with Sound SourceOperating to Obtain SoundPressure Level Due to SoundSource Alone, dBLess than 6 No correction allowed61718190.510 0.5Greater than 10 0F13340238.2.2.1 Center the principal module over the source locationas determined in 5.2.8.2.2.2 Take care to ensure the rotating brush model d

40、oesnot damage the carpet seam (that is, center upright on carpet oncenter of carpet with the rotating brush perpendicular to seam).8.2.2.3 Second ModuleIf there is a second module notintegral with the basic unit (for example, the power nozzle), itshall be positioned on the side of the principle modu

41、le awayfrom the center of the room. Position the second module insuch a way that, to the maximum extent possible, its soundemissions are not shielded by the principal module, and viceversa. For example, a position shall be such that air exhaustnoise will radiate into the room in a direction other th

42、an towardthe second module.8.2.3 HandleAny operating handle shall be separatelysupported in a position such that the handle grip is 3112 in. (80cm) above the carpet surface. Take care that the supportstructure does not introduce additional rattles, etc. There shallbe a resilient clamping of the hand

43、le to the support structure.8.2.4 Central Vacuum Cleaner Power (or Straight Air)NozzlesFor central vacuum power (or straight air) nozzles,the hose is connected to the wall inlet valve.The hose assemblywith power (or straight air) nozzle is then positioned in thesame manner as the hose assembly and p

44、ower head for acanister vacuum cleaner. See 8.2.2-8.2.3.9. Sampling9.1 Test a sufficient number of samples of each vacuumcleaner model until a 90 % confidence level is establishedwithin 62.0 dBA of the mean value. Test a minimum of threesamples.10. Measurement Procedure10.1 Check the calibration of

45、each microphone according tothe instrument manufacturers directions.510.2 At each of the six microphone positions determined in5.2, measure the background A-weighted sound pressure level.Step 10.2 can be ignored if it is known that the backgroundsound pressure levels are more than 10 dB below the so

46、undpressure levels of all sources being considered at all micro-phone locations.10.3 With the reference sound source in the location definedin Section 8 and running in accordance to the manufacturersrecommendations, measure the A-weighted sound pressurelevel at the six microphone positions. After ma

47、king thenecessary corrections for the influence of the background noiseat each microphone location and ensuring that the standarddeviation requirement of 5.2 is met, calculate the space-averaged A-weighted sound pressure level of the referencesound source, Lpr, using the equation:Lpor Lpr5 10 logH1N

48、m(i 5 1Nm10Li/10J(1)where:Lpor Lpr= A-weighted sound pressure level averagedover all microphone positions, for a singlesource location, dB,Li= A-weighted sound pressure level for the i thmicrophone position, dB, andNm= number of microphone positions.10.4 Replace the reference sound source with the t

49、est unit.With the test unit operating in accordance to Section 7,measure the A-weighted sound pressure level at the sixmicrophone locations. After making the necessary correctionsfor the influence of the background noise at each microphonelocation, calculate the space-averaged A-weighted sound pres-sure level, Lp, of the test unit using the equation of 10.3.10.5 Using the space-averaged A-weighted sound pressurelevels, Lprand Lp, and the known A-weighted sound powerlevel of the reference sound source, calculate the A-weightedsound power level of th