ASTM F1334-2014 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: F1334 12F1334 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

2、case of 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-weighted sound power level emitted by small po

3、rtable upright, canister,combination vacuum cleaners, backpack vacuum cleaners, hard-floor machines, and central vacuum cleaner motorized nozzlesintended for operation in domestic and commercial applications.1.1.1 To determine the Sound Power Level of a central vacuum at the power unit location refe

4、r to Test Method F2544.1.2 A-weighted sound pressure measurements are performed on a stationary vacuum cleaner in a semi-reverberant room. Thistest method determines sound power by a comparison method for small noise sources, that is, comparison to a broadband referencesound source.1.3 This test met

5、hod describes a procedure for determining the approximate A-weighted sound power level of small noisesources. This test method uses a non-special semi-reverberant room.1.4 Results are expressed as A-weighted sound power level in decibels (referenced to one picowatt).1.5 The values stated in inch-pou

6、nd units are to be regarded as the standard. The values in parentheses are for information only.1.6 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibilityof the user of this standard to establish appropriate safety and health p

7、ractices and determine the applicability of regulatorylimitations prior to use.2. Referenced Documents2.1 ASTM Standards:2C634 Terminology Relating to Building and Environmental AcousticsE177 Practice for Use of the Terms Precision and Bias in ASTM Test MethodsE691 Practice for Conducting an Interla

8、boratory Study to Determine the Precision of a Test MethodF608 Test Method for Evaluation of Carpet Embedded Dirt Removal Effectiveness of Household/Commercial Vacuum CleanersF655 Specification for Test Carpets and Pads for Vacuum Cleaner TestingF2544 Test Method for Determining A-Weighted Sound Pow

9、er Level of Central Vacuum Power UnitsF2607 Test Method for Measuring the Hard Surface Floor-Cleaning Ability of Household/Commercial Vacuum Cleaners2.2 ANSI Standards:3ANSI S1.10 Method for the Calibration of MicrophonesANSI S1.43 Specifications for Integrating-Averaging Sound Level MetersANSI S12.

10、51/ISO 3741 Acoustics - Determination of sound power levels of noise sources using sound pressure - Precisionmethods for reverberation roomsANSI S12.53/ISO 3743 Acoustics - Determination of sound power levels of noise sources - Engineering methods for small,movable sources in reverberant fieldsANSI

11、S12.57/ISO 3747 Standard Acoustics - Determination of sound power levels of noise sources using sound pressure -Comparison method in situ1 This test method is under the jurisdiction ofASTM Committee F11 on Vacuum Cleaners and is the direct responsibility of Subcommittee F11.25 on Sound Measurement.C

12、urrent edition approved June 1, 2012Aug. 1, 2014. Published June 2012August 2014. Originally approved in 1991. Last previous edition approved in 20112012 asF1334 11.F1334 12. DOI: 10.1520/F1334-12.10.1520/F1334-14.2 For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Cu

13、stomer Service at serviceastm.org. For Annual Book of ASTM Standardsvolume information, refer to the standards Document Summary page on the ASTM website.3 Available from American National Standards Institute, 11 W. 42nd St., 13th Floor, New York, NY 10036.This document is not an ASTM standard and is

14、 intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Becauseit may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the

15、current versionof the standard as published by ASTM is to be considered the official document.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States13. Terminology3.1 Definitions:3.1.1 population, nthe total of all of the units of the partic

16、ular model or type, or both, of vacuum cleaner being tested.3.1.2 population sample or sample, nthree or more test units, randomly taken from the population.3.1.3 reference sound source, na standard source of broadband sound with a certified set of sound power emissions.3.1.4 source, na device that

17、emits sound. This may be the vacuum cleaner or a motorized nozzle.3.1.5 test unit or unit, na single vacuum cleaner or nozzle cleaner, nozzle, or hard-floor machine of the model or type, or both,being tested.3.1.6 Unless otherwise indicated, definitions are in accordance with Terminology C634.4. Sig

18、nificance and Use4.1 The test results enable the comparison of A-weighted sound emission from vacuum cleaners or hard-floor machines whentested under the condition of this test method.5. Test Room Requirements5.1 The test room shall be semi-reverberant. It shall contain sufficiently little sound abs

19、orption material so the requirements of5.2 can be met. It should be large enough to meet the dimension requirements of 5.2.5.1.1 When a central vacuum cleaner motorized nozzle is to be tested, the test room should be plumbed for a central vacuumsystem according to the manufacturers instructions usin

20、g standard 2.00-in. diameter thin-wall PVC tubing.Asingle wall inlet shallbe located in the test room.5.2 Identify a location on the test room floor which can accommodate six equally spaced microphone positions 60 apart locatedat a height of 60 in. (1.5 m) above the floor on a 12 ft (3.6 m) diameter

21、 circle the center of which is the center of the sound source.These positions shall result in a standard deviation of the six sound pressure measurements of not more than 2.3 dB whenmeasuring the reference sound source. This location is suitable for the vacuum cleaner and reference sound source for

22、this testmethod. Refer to Figs. 1-4 for typical layouts.5.2.1 Use the same microphone setup for both canister and backpack vacuums. Backpack vacuums need to be mounted 32 in.(800 mm) from the floor to the bottom of the backpack vacuum. The means of mounting shall not interfere with the backpackopera

23、tion or cause vibration when mounted.5.3 EnvironmentalAmbient test conditions within the test room shall be controlled to within 70 6 5F (21 6 3C) and 30 to70 % relative humidity.5.4 Also, any room which has qualified in accordance with ANSI S12.51/ISO 3741, ANSI S12.53/ISO 3743, and ANSIS12.57/ISO

24、3747 may be used to measure the sound power levels of vacuum cleaners or motorized nozzles.cleaners, motorizednozzles, or hard-floor machines.5.5 The measuredA-weighted sound pressure levels shall be corrected for the influence of background noise according to Table1. When the steady background-nois

25、e sound pressure level is more than 6 dB below the sound pressure level at each measurementpoint, the measured A-weighted sound pressure levels shall be corrected for the influence of background noise according to Table1. If this difference is less than 6 dB no correction is allowed and any reported

26、 data must include a note indicating that thebackground noise requirements of this standard were not satisfied.6. Instrumentation and Equipment6.1 Acoustical InstrumentationThe sound measurement system shall be as specified in ANSI S1.43.FIG. 1 Sound Set UpF1334 1426.2 Voltage Regulator SystemThe re

27、gulator shall be capable of maintaining the vacuum cleaners rated voltage (61 %) andfrequency (61 Hz) having a waveform that is essentially sinusoidal with 3% maximum harmonic distortion for the duration of thetest.6.3 Test Carpet and PadThe test carpet and pad shall be 54 in. wide (137 cm) and 72 i

28、n. (183 cm) long. The carpet shall bemultilevel. Carpet and pad shall be as specified in Specification F655.NOTE 1For this test method two standard size 27 by 72-in. (69 by 183-cm) long test carpets could be placed side by side to make it 54 by 72 in.(138 by 183 cm) long. It is recommended that the

29、two pieces of test carpet be taped to the floor, side by side with the pile running in the same direction.6.4 Hard Surface Floor (VCT)Any smooth (minimal texture, no seams) vinyl floor covering as specified in Test MethodF2607. Flooring to be glued to a plywood supporting surface over the whole area

30、. Plywood supporting surface to be a flat surfaceconsisting of a piece of 34-in. (19-mm) thick exterior-grade plywood with the “A” surface upward to support the test surface.Surface shall be 54 in. wide (137 cm) and 72 in. (183 cm) long. If the test area has a smooth hard floor surface this area may

31、 alsobe used.6.5 Reference Sound SourceThe reference sound source shall 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 means of measuring relative humidity, accurate to within 62 % over the range used.FIG. 2 Sound Test Patter

32、n for UprightsFIG. 3 Sound Test Pattern for Canisters and Backpack Vacuum CleanersF1334 1437. Operation of Vacuum Cleaner or Hard-Floor Machine7.1 Run-InOperate new test cleaners continuously for at least 1 h prior to testing. Canister cleaners and backpack vacuumcleaners shall be run open with no h

33、ose attached. Upright and power nozzles shall be run so that the rotating brush does not engagethe carpet or the floor.7.2 Warm-UpOperate the cleaners for 10 min just prior to making sound pressure level measurements in the sameconfiguration as described in 7.1.7.3 Test Configuration:7.3.1 The vacuu

34、m cleaner shall be configured for the carpet cleaning or hard-floor cleaning mode.7.3.2 The dust bag or primary filter shall be new.new, if applicable.7.3.3 All belts belts, if equipped, shall be new at the start of the run-in.7.3.4 Rotating agitator type cleaner including power nozzle shall use the

35、 same setting as specified in Test Method F608 forcleaning multilevel carpet or in Test Method F2607 for hard floor cleaning, which is as follows:7.3.4.1 If various settings are provided, set the motor speed setting, suction regulator, or nozzle height, or combination thereof,using the manufacturers

36、 specified setting for cleaning multilevel carpet or hard-floor surfaces. Momentary or instantaneous speedsare not to be used.7.3.5 For straight air canister cleaners and backpack vacuum cleaners, use the same setting specified in Test Method F608 forcleaning multilevel carpet or in Test Method F260

37、7 for hard floor cleaning, which is as follows:7.3.5.1 If various settings are provided, set the motor setting, suction regulator, or nozzle height, or combination thereof, usingthe manufacturers specific setting for cleaning multilevel carpet or hard-floor surfaces. If no specific instructions are

38、given, or ifjudged to be inadequate or unclear, position the nozzle on the carpet so the maximum suction is provided, taking care to maintainthe tilt angle throughout the test. Momentary or instantaneous speeds are not to be used.7.3.6 VoltageTests are to be conducted at the nameplate voltage (61 %)

39、 and frequency (61 Hz) throughout the test. Forcleaners with dual nameplate voltage ratings, conduct sound tests at the highest voltage.FIG. 4 Sound Test Pattern for CV AccessoriesTABLE 1 Corrections for Background Noise LevelsDifference Between Sound PressureLevel Measured with Sound Source Operati

40、ngand 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 allowed6 17 18 19 0.510 0.5Greater than 10 0F1334 1447.3.7 Central Vacuum Power UnitThe cen

41、tral vacuum power unit shall be remotely located (outside the semi-reverberateroom) so that the noise levels generated by the power unit do not affect the test results of the central vacuum (motorized or straightair) nozzle being tested.8. Location of Sound Sources and Equipment8.1 Carpet and PadLay

42、 the carpet and pad or the VCT flooring on the floor with the geometric center of the carpet directlyover the center of the circle defined in 5.2.8.2 Locate the vacuum cleaner or the reference sound source at the position determined in 5.2. All modules (generally themotor/blower and its housing in t

43、he base of an upright unit, or in the canister of a canister unit) shall be adequately secured in amanner which will not affect the sound pressure readings.8.2.1 Reference Sound Source LocationPosition the center of the radiating portion (fan blades, for an aerodynamic source)over the location defin

44、ed above. The reference sound source is placed directly on the carpet or VCT floor.hard surface.8.2.2 Vacuum Cleaner Location:8.2.2.1 Center the principal module over the source location as determined in 5.2.8.2.2.2 Take care to ensure the rotating brush model does not damage the carpet seam (that i

45、s, center upright on carpet on centerof carpet with the rotating brush perpendicular to seam).8.2.2.3 Second ModuleIf there is a second module not integral with the basic unit (for example, the power nozzle), it shallbe positioned on the side of the principle module away from the center of the room.

46、 Position the second module in such a waythat, to the maximum extent possible, its sound emissions are not shielded by the principal module, and vice versa. For example,a position shall be such that air exhaust noise will radiate into the room in a direction other than toward the second module.8.2.3

47、 HandleAny operating handle shall be separately supported in a position such that the handle grip is 3112 in. (80 cm)above the carpet surface or VCThard surface. Take care that the support structure does not introduce additional rattles, etc. Thereshall be a resilient clamping of the handle to the s

48、upport structure.8.2.4 Central Vacuum Cleaner Power (or Straight Air) NozzlesFor central vacuum power (or straight air) nozzles, the hoseis connected to the wall inlet valve. The hose assembly with power (or straight air) nozzle is then positioned in the same manneras the hose assembly and power hea

49、d for a canister vacuum cleaner. See 8.2.2 8.2.3.9. Sampling9.1 Test a sufficient number of samples of each vacuum cleaner model until a 90 % confidence level is established within 62.0dBA of the mean value. Test a minimum of three samples.10. Measurement Procedure10.1 Check the calibration of each microphone according to the instrument manufacturers directions (further informationprovided in ANSI S1.10).10.2 At each of the six microphone positions determined in 5.2, measure the backgroundA-weighted sound pressure level. Thisstep can be ign