1、Designation: F1334 14 An 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
2、revision, 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 up
3、right, canister,combination vacuum cleaners, backpack vacuum cleaners,hard-floor machines, and central vacuum cleaner motorizednozzles intended for operation in domestic and commercialapplications.1.1.1 To determine the Sound Power Level of a centralvacuum at the power unit location refer to Test Me
4、thod F2544.1.2 A-weighted sound pressure measurements 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 descri
5、bes a procedure for determiningthe approximate 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
6、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. It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and de
7、termine the applica-bility of regulatory limitations 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
8、toDetermine the Precision of a Test MethodF608 Test Method for Evaluation of Carpet Embedded DirtRemoval Effectiveness of Household/CommercialVacuum CleanersF655 Specification for Test Carpets and Pads for VacuumCleaner TestingF2544 Test Method for Determining A-Weighted SoundPower Level of Central
9、Vacuum Power UnitsF2607 Test Method for Measuring 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
10、- Determination of soundpower levels of noise sources 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 Standard
11、 Acoustics - Determinationof sound power levels 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, nth
12、ree or more testunits, randomly taken from the population.3.1.3 reference sound source, na standard source ofbroadband sound with a certified set of sound power emissions.1This test method is under the jurisdiction ofASTM Committee F11 on VacuumCleaners and is the direct responsibility of Subcommitt
13、ee F11.25 on SoundMeasurement.Current edition approved Aug. 1, 2014. Published August 2014. Originallyapproved in 1991. Last previous edition approved in 2012 as F1334 12. DOI:10.1520/F1334-14.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at se
14、rviceastm.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.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, W
15、est Conshohocken, PA 19428-2959. United States13.1.4 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, nozzle,or hard-floor machine of the model or type, or both, beingtested.3.1.6 Unless otherwise indicated, de
16、finitions are in accor-dance with Terminology C634.4. Significance and Use4.1 The test results enable the comparison of A-weightedsound emission from vacuum cleaners or hard-floor machineswhen tested under the condition of this test method.5. Test Room Requirements5.1 The test room shall be semi-rev
17、erberant. 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 cleaner motorized nozzle is tobe tested, the test room should be plumbed for a centralvacuum sy
18、stem 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 canaccommodate six equally spaced microphone positions 60apart located at a height of 60 in
19、. (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 not morethan 2.3 dB when measuring the reference sound source. Thislocation is suitable for
20、the vacuum cleaner and reference soundsource for this test method. Refer to Figs. 1-4 for typicallayouts.5.2.1 Use the same microphone setup for both canister andbackpack vacuums. Backpack vacuums need to be mounted 32in. (800 mm) from the floor to the bottom of the backpackvacuum. The means of moun
21、ting shall not interfere with thebackpack operation or cause vibration when mounted.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 37
22、41, ANSI S12.53/ISO 3743, and ANSIS12.57/ISO 3747 may be used to measure the sound powerlevels of vacuum cleaners, motorized nozzles, or hard-floormachines.5.5 The measuredA-weighted sound pressure levels shall becorrected for the influence of background noise according toTable 1. When the steady ba
23、ckground-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 1. If this difference is less than 6 dB nocorrection is allowed and an
24、y reported data must include a noteindicating that the background noise requirements of thisstandard were not satisfied.FIG. 1 Sound Set UpFIG. 2 Sound Test Pattern for UprightsFIG. 3 Sound Test Pattern for Canisters and Backpack VacuumCleanersF1334 1426. Instrumentation and Equipment6.1 Acoustical
25、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) having a waveform that isessentially sinusoidal with 3% maximum harmonic distortionf
26、or 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.NOTE 1For this test method two standard size 27 by 72-in. (69 by183-cm) long te
27、st 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 testcarpet 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 coveri
28、ng as specified in TestMethod F2607. Flooring to be glued to a plywood supportingsurface over the whole area. Plywood 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
29、in. wide (137 cm) and 72in. (183 cm) long. If the test area has a smooth hard floorsurface this area may also be used.6.5 Reference Sound SourceThe reference sound sourceshall meet the requirements of ANSI S12.57/ISO 3747.6.6 Instrumentation:6.6.1 Thermometer, accurate to within 63F (62C).6.6.2 A me
30、ans of measuring relative humidity, accurate towithin 62 % over the range used.7. Operation of Vacuum Cleaner or Hard-Floor Machine7.1 Run-InOperate new test cleaners continuously for atleast 1 h prior to testing. Canister cleaners and backpackvacuum cleaners shall be run open with no hose attached.
31、Upright and power nozzles shall be run so that the rotatingbrush does not engage the carpet or the floor.7.2 Warm-UpOperate the cleaners for 10 min just prior tomaking sound pressure level measurements in the same con-figuration as described in 7.1.7.3 Test Configuration:7.3.1 The vacuum cleaner sha
32、ll be configured for the carpetcleaning or hard-floor cleaning mode.7.3.2 The dust bag or primary filter shall be new, ifapplicable.7.3.3 All belts, if equipped, shall be new at the start of therun-in.7.3.4 Rotating agitator type cleaner including power nozzleshall use the same setting as specified
33、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 manufacturers specified setting for cleani
34、ngmultilevel carpet or hard-floor surfaces. Momentary or instan-taneous speeds are not to be used.7.3.5 For straight air canister cleaners and backpackvacuum cleaners, use the same setting specified in Test MethodF608 for cleaning multilevel carpet or in Test Method F2607for hard floor cleaning, whi
35、ch is as follows: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
36、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
37、 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
38、esults of the central vacuum(motorized or straight air) nozzle being tested.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 Subtra
39、ctedfrom 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 1438. Location of Sound Sources and Equipment8.1 Carpet and PadLay the carpet and pad or the VCTflooring
40、on the floor with the geometric center of the carpetdirectly over the center of 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 canis
41、ter 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 centerof the radiating portion (fan blades, for an aerodynamic source)over the location defined above. The reference sound source isplace
42、d directly on the carpet or hard surface.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 carpet with the r
43、otating 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, to the maxim
44、um 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
45、position such that the handle grip is 3112 in. (80cm) above the carpet surface or hard 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
46、)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 power head for acanister vacuum cleaner. See 8.2.2 8.2.3.9. Sampling9.1 Test a s
47、ufficient 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 in
48、formationprovided 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 be
49、ing 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 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 L
