ASTM F1334-2011 Standard Test Method for Determining A-Weighted Sound Power Level of Vacuum Cleaners《测定真空吸尘器A加权声功率级的标准试验方法》.pdf

1、Designation: F1334 11An American National StandardStandard Test Method forDetermining A-Weighted Sound Power Level of VacuumCleaners1This standard is issued under the fixed designation F1334; the number immediately following the designation indicates the year oforiginal adoption or, in the case of r

2、evision, the year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon () 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 upr

3、ight, canister,combination vacuum cleaners, and central vacuum cleanermotorized nozzles intended for operation in domestic andcommercial applications.1.1.1 To determine the Sound Power Level of a centralvacuum at the power unit location refer to Test Method F2544.1.2 A-weighted sound pressure measur

4、ements are per-formed on a stationary vacuum cleaner in a semi-reverberantroom. This test method determines sound 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

5、A-weighted sound power level of small noisesources. This test method uses a non-special semi-reverberantroom.1.4 Results are expressed as A-weighted sound power levelin decibels (referenced to one picowatt).1.5 The values stated in inch-pound units are to be regardedas the standard. The values in pa

6、rentheses are for informationonly.1.6 This standard does not purport to address all of thesafety concerns, if any, associated with its use. It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limita

7、tions prior to use.2. Referenced Documents2.1 ASTM Standards:2C634 Terminology Relating to Building and EnvironmentalAcousticsE177 Practice for Use of the Terms Precision and Bias inASTM Test MethodsE691 Practice for Conducting an Interlaboratory Study toDetermine the Precision of a Test MethodF608

8、Test Method for Evaluation of Carpet Embedded DirtRemoval Effectiveness of Household/Commercial VacuumCleanersF655 Specification for Test Carpets and Pads for VacuumCleaner TestingF2544 Test Method for Determining A-Weighted SoundPower Level of Central Vacuum Power UnitsF2607 Test Method for Measuri

9、ng the Hard Surface Floor-Cleaning Ability of Household/Commercial VacuumCleaners2.2 ANSI Standards:3ANSI S1.10 Method for the Calibration of MicrophonesANSI S1.43 Specifications for Integrating-Averaging SoundLevel MetersANSI S12.51/ISO 3741 Acoustics - Determination of soundpower levels of noise s

10、ources using sound pressure -Precision methods for reverberation roomsANSI S12.53/ISO 3743 Acoustics - Determination of soundpower levels of noise sources - Engineering methods forsmall, movable sources in reverberant fieldsANSI S12.57/ISO 3747 StandardAcoustics - Determinationof sound power levels

11、of noise sources using soundpressure - Comparison method in situ3. Terminology3.1 Definitions:3.1.1 population, nthe total of all of the units of theparticular model or type, or both, of vacuum cleaner beingtested.3.1.2 population sample or sample, nthree or more testunits, randomly taken from the p

12、opulation.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 motorized nozzle.3.1.5 test unit or unit, na single vacuum cleaner or nozzleof the model or type, or

13、 both, being tested.1This test method is under the jurisdiction ofASTM Committee F11 on VacuumCleaners and is the direct responsibility of Subcommittee F11.25 on SoundMeasurement.Current edition approved Nov. 1, 2011. Published December 2011. Originallyapproved in 1991. Last previous edition approve

14、d in 2008 as F1334 08. DOI:10.1520/F1334-11.2For referenced ASTM standards, visit the ASTM 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 A

15、merican National Standards Institute, 11 W. 42nd St., 13thFloor, New York, NY 10036.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.3.1.6 Unless otherwise indicated, definitions are in accor-dance with Terminology C634.4. Significanc

16、e and Use4.1 The test results enable the comparison of A-weightedsound emission from 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 requireme

17、ntsof 5.2 can be met. It should be large enough to meet thedimension requirements of 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-in. diameter thin-wa

18、ll PVC tubing. Asingle wall inlet shall be located in the test room.5.2 Identify a 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 c

19、enterof the sound source. These positions shall result in a standarddeviation of the 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 fo

20、r typicallayouts.5.3 EnvironmentalAmbient test conditions within the testroom shall be controlled to within 70 6 5F (21 6 3C) and 30to 70 % relative humidity.5.4 Also, any room which has qualified in accordance withANSI S12.51/ISO 3741, ANSI S12.53/ISO 3743, and ANSIS12.57/ISO 3747 may be used to me

21、asure the sound powerlevels of vacuum cleaners or motorized nozzles.5.5 The measuredA-weighted sound pressure levels shall 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 e

22、achmeasurement point, the measured A-weighted sound pressurelevels shall be corrected for the influence of background noiseaccording to Table 1. If this difference is less than 6 dB nocorrection is allowed and any reported data must include a noteindicating that the background noise requirements of

23、thisstandard were not satisfied.6. Instrumentation and Equipment6.1 Acoustical InstrumentationThe sound measurementsystem shall be as specified in ANSI S1.43.6.2 Voltage Regulator SystemThe regulator shall be ca-pable of maintaining the vacuum cleaners rated voltage(61 %) and frequency (61 Hz) havin

24、g a waveform that isessentially sinusoidal with 3% maximum harmonic distortionfor the duration of the test.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 F655.

25、NOTE 1For this test method two standard size 27 by 72-in. (69 by183-cm) long test carpets could be placed side by side to make it 54 by 72in. (138 by 183 cm) long. It is recommended that the two pieces of testFIG. 1 Sound Set UpFIG. 2 Sound Test Pattern for UprightsFIG. 3 Sound Test Pattern for Cani

26、stersF1334 112carpet be taped to the floor, side by side with the pile running in the samedirection.6.4 Hard Surface Floor (VCT)Any smooth (minimaltexture, no seams) vinyl floor covering as specified in TestMethod F2607. Flooring to be glued to a plywood supportingsurface over the whole area. Plywoo

27、d supporting surface to bea flat surface consisting of a piece of34-in. (19-mm) thickexterior-grade plywood with the “A” surface upward to supportthe test surface. Surface shall be 54 in. wide (137 cm) and 72in. (183 cm) long.6.5 Reference Sound SourceThe reference sound sourceshall meet the require

28、ments of ANSI S12.57/ISO 3747.6.6 Instrumentation:6.6.1 Thermometer, accurate to within 63F (62C).6.6.2 A means of measuring relative humidity, accurate towithin 62 % over the range used.7. Operation of Vacuum Cleaner7.1 Run-InOperate new test cleaners continuously for atleast 1 h prior to testing.

29、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 described i

30、n 7.1.7.3 Test Configuration:7.3.1 The vacuum cleaner shall be configured for the carpetcleaning or hard-floor cleaning 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

31、the same setting as specified in Test Method F608 forcleaning multilevel carpet or in Test Method F2607 for hardfloor cleaning, 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 manufacturer

32、s specified setting for cleaningmultilevel carpet or hard-floor surfaces. Momentary or instan-taneous speeds are not to be used.7.3.5 For straight air canister cleaners use the same settingspecified in Test Method F608 for cleaning multilevel carpet orin Test Method F2607 for hard floor cleaning, wh

33、ich is asfollows:7.3.5.1 If various settings are provided, set the motorsetting, suction regulator, or nozzle height, or combinationthereof, using the manufacturers specific setting for cleaningmultilevel carpet or hard-floor surfaces. If no specific instruc-tions are given, or if judged to be inade

34、quate or unclear,position the nozzle on the carpet so the maximum suction isprovided, taking care to maintain the tilt angle throughout thetest. Momentary or instantaneous speeds are not to be used.7.3.6 VoltageTests are to be conducted at the nameplatevoltage (61 %) and frequency (61 Hz) throughout

35、 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 remotely located (outside the semi-reverberate room) so that the noise levels generated by thepower unit do not affect the test r

36、esults 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 or the VCTflooring on the floor with the geometric center of the carpetdirectly over the center of the circle defined in 5.2.8.2 Locate the v

37、acuum 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 canister unit) shall be adequately securedin a manner which will not affect the sound pressure readings.8.2.1 Ref

38、erence 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 on the carpet or VCT floor.8.2.2 Vacuum Cleaner Location:8.2.2.1 Center the principal module over the source

39、locationas determined in 5.2.8.2.2.2 Take care to ensure the rotating brush model doesnot 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

40、example, the power nozzle), itshall be positioned on the side of the principle module awayfrom the center of the room. Position the second module inFIG. 4 Sound Test Pattern for CV AccessoriesTABLE 1 Corrections for Background Noise LevelsDifference Between Sound PressureLevel Measured with Sound So

41、urce Operatingand Background NoiseLevel Alone, dBCorrection to be Subtractedfrom Sound Pressure LevelMeasured with Sound SourceOperating to Obtain SoundPressure Level Due to SoundSource Alone, dBLess than 6 No correction allowed61718190.510 0.5Greater than 10 0F1334 113such a way that, to the maximu

42、m 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 than towardthe second module.8.2.3 HandleAny operating handle shall be separatelysupported in a p

43、osition such that the handle grip is 3112 in. (80cm) above the carpet surface or VCT surface. Take care that thesupport structure does not introduce additional rattles, etc.There shall be a resilient clamping of the handle to the supportstructure.8.2.4 Central Vacuum Cleaner Power (or Straight Air)N

44、ozzlesFor 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 power head for acanister vacuum cleaner. See 8.2.2-8.2.3.9. Sampling9.1 Test a suf

45、ficient 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 each microphone according tothe instrument manufacturers directions (further info

46、rmationprovided in ANSI S1.10).10.2 At each of the six microphone positions determined in5.2, measure the background A-weighted sound pressure level.This step can be ignored if it is known that the backgroundsound pressure levels are more than 10 dB below the soundpressure levels of all sources bein

47、g 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 making thenecessary corrections for the

48、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 logH1Nm(i 5 1Nm10Li/10J(1)where:Lpor Lpr= A-

49、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 test 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 so