ASTM F1334-2008 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

1、Designation: F 1334 08An 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.1.1.1 To determine the Sound Power Level of a centralvacuum at the power unit location refer to Test Method F 2544.1.2 A-weighted sound pressure me

4、asurements 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 approxim

5、ate 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 i

6、n parentheses 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 li

7、mitations prior to use.2. Referenced Documents2.1 ASTM Standards:2C 634 Terminology Relating to Building and Environmen-tal AcousticsE 177 Practice for Use of the Terms Precision and Bias inASTM Test MethodsE 691 Practice for Conducting an Interlaboratory Study toDetermine the Precision of a Test Me

8、thodF 608 Test Method for Evaluation of Carpet Embedded DirtRemoval Effectiveness of Household/Commercial VacuumCleanersF 655 Specification for Test Carpets and Pads for VacuumCleaner TestingF 2544 Test Method for Determining A-Weighted SoundPower Level of Central Vacuum Power Units2.2 ANSI Standard

9、s: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 sources using sound pressure -Precision methods for reverberation roomsANSI S12.53/ISO 3743 Acousti

10、cs - Determination of soundpower levels of noise sources - Engineering methods forsmall, movable sources in reverberant fieldsANSI S12.57/ISO 3747 StandardAcoustics - Determinationof sound power levels of noise sources using soundpressure - Comparison method in situ3. Terminology3.1 Definitions:3.1.

11、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 population.3.1.3 reference sound source, na standard source ofbroadband sound with a certified set

12、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 both, being tested.3.1.6 Unless otherwise indicated, definitions are in accor-dance with Terminol

13、ogy C 634.1This 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 Feb. 1, 2008. Published March 2008. Originallyapproved in 1991. Last previous edition approved in 2002 as

14、F 1334 02.2For 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 American National Standards Institu

15、te, 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.4. Significance and Use4.1 The test results enable the comparison of A-weightedsound emission from vacuum cleaners when tested under th

16、econdition 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 5.2.5.1.1 When a central vacuum clea

17、ner 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-wall PVC tubing. Asingle wall inlet shall be located in the test room.5.2 Identify a location on the test room floor which

18、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 the six sound pressure measurements of n

19、ot 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 be controlled to within 70 6 5F (21 6

20、 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 measure the sound powerlevels of vacuum cleaners.5.5 The measuredA-weighted sound pressure levels shall becorrected for the

21、 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 noiseaccording to Table

22、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 thisstandard were not satisfied.6. Instrumentation and Equipment6.1 Acoustical InstrumentationThe sound measurementsystem shall be as specifie

23、d 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) having a waveform that isessentially sinusoidal with 3% maximum harmonic distortionfor the duration of the test.6.3 Test Carpet and PadThe test car

24、pet 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 placed side by side to make it 54 by 72in.

25、 (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 ANSI S12.57/ISO 3747.FIG. 1 Sound Set UpFIG. 2 Sound Test Patte

26、rn for UprightsFIG. 3 Sound Test Pattern for CanistersF 1334 0826.5 Instrumentation:6.5.1 Thermometer, accurate to within 63F (62C).6.5.2 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

27、for atleast 1 h prior to testing. 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

28、same con-figuration as described 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 nozzl

29、eshall use the same setting as specified in Test 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 cleaningmult

30、ilevel carpet. Momentary or instantaneous speeds are notto be used.7.3.5 For straight air canister cleaners use the same settingspecified in Test 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 nozz

31、le height, or combinationthereof, using 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 through

32、out the test. Momentary orinstantaneous 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 Uni

33、tThe 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 results of the central vacuum(motorized or straight air) nozzle being tested.8. Location of Sound Sources and Equipment8.1 Carpet and

34、 PadLay the carpet and pad on the floorwith 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 up

35、right 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 Reference Sound Source LocationPosition the cen-ter of the radiating portion (fan blades, for an aerodynamicsource) over the location defined above. The re

36、ference soundsource is placed directly on the carpet.8.2.2 Vacuum Cleaner Location:8.2.2.1 Center the principal module over the source locationas determined in 5.2.8.2.2.2 Take care to ensure the rotating brush model doesnot damage the carpet seam (that is, center upright on carpet oncenter of carpe

37、t 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 module awayfrom the center of the room. Position the second module insuch a way that,

38、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 than towardthe second module.8.2.3 HandleAny operating handle shall be separatelysup

39、ported 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 handle to the support structure.8.2.4 Central Vacuum Cleaner Power (or Straight Air)No

40、zzlesFor 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 theFIG. 4 Sound Test Pattern for CV AccessoriesTABLE 1 Corrections for Background Noise LevelsDifference Between Sound Pres

41、sureLevel Measured with Sound Source 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 0F 1334

42、083same manner as the hose assembly and power 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. Measuremen

43、t Procedure10.1 Check the calibration of each microphone according tothe instrument manufacturers directions (further informationprovided 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 i

44、t is known that the backgroundsound pressure levels are more than 10 dB below the soundpressure 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,

45、measure the A-weighted sound pressurelevel at the six microphone positions. After making 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 pres

46、sure level of the referencesound source, Lpr, using the equation:Lpor Lpr5 10 logH1Nm(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, andN

47、m= 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 n

48、oise at each microphonelocation, calculate the space-averaged A-weighted sound pres-sure level, Lp, of the test unit using Eq 1.10.5 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-weighteds

49、ound power level of the test unit using the procedure of 11.1.10.6 Using the same test unit repeat steps 10.2-10.5 two (2)additional times for a total of three (3) test runs.10.7 The sound power level (score) for each individual testunit is the arithmetic average of the A-weighted sound powerlevels of three test runs which meet the repeatability require-ments of Section 14. See Annex A1 for a procedural exampleand to determine if additional test runs need to be conducted.10.8 A minimum of two additional test units of the samemodel must be selected in