GB/T 4214.1-2017Test method for noise of household and similar electrical appliances -- General requirements (English PDF)

Foreword

GB/T 4214 "Test method for noise of household and similar electrical appliances"

consists of several parts. Part 1 is the general requirements. Other parts are

particular requirements.

This Part is Part 1 of GB/T 4214.

This Part is drafted in accordance with the rules given in GB/T 1.1-2009.

This Part replaces GB/T 4214.1-2000 "Acoustics - Household and similar

electrical appliances - Test code for determination of airborne acoustical noise

- Part 1.General requirements". As compared with GB/T 4214.1-2000, in

addition to editorial changes, the main technical changes are as follows.

- For Clause 1 Scope, modify the scope of the appliance not applicable;

- ADD the term and definition of 3.10;

- ADD instructions for testing the parts of household appliances, including

loading and testing enveloping surface, etc. (See 6.2.5, 6.4.1, 7.1.4);

- Propose the test method for frequency-conversion household appliances

(See 6.4.1);

- Describe the installation of wall-mounted appliances in detail (See 6.5.4,

7.1.2);

- For the test of wall built-in appliance, GIVE a detailed description of the test

method and the test enclosure (See 6.5.5, Annex B);

- For the selection of hemispherical enveloping surface, MAKE a division and

description. The radius is not limited to 1.5 m and 2 m. For small appliances

and household appliance parts etc., a test radius of 1 m can be used (See

7.1.4);

- ADD a test method for the operational noise of non-stationary appliances

(See 7.4.1);

- Modify the provisions for corrected value of background noise (See 8.2).

This Part uses redraft law to modify and adopt IEC 60704-1.2010 (Edition 3.0)

"Household and similar electrical appliances - Test code for the determination

of airborne acoustical noise - Part 1.General requirements".

As compared with IEC 60704-1.2010, the main technical differences in this Part

and their reasons are as follows.

- About normative references, this Part has made adjustments with technical

differences, to adapt to the technical conditions of China. The adjustments

are reflected in Clause 2 "Normative references", as follows.

 Replace IEC 61260.1995 with GB/T 3241-2010 which modifies and

adopts the international standard;

 Replace ISO 3744.1994 with GB/T 3767-1996 which is not equivalent

to the international standard.

- For Clause 1 Scope, modify the scope of the appliance not applicable.

Reason. Household and similar air conditioners are covered by this

Standard.

- ADD the term and definition of 3.10.Reason. This term appears in 7.4.1.

- ADD instructions for testing the parts of household appliances, including

loading and testing enveloping surface, etc. (6.2.5, 6.4.1, 7.1.4). Reason.

Define the test method for parts of household appliances.

- Propose the test method for frequency-conversion household appliances

(6.4.1). Reason. Define the test method for frequency-conversion

household appliances.

- Describe the installation of wall-mounted appliances in detail (7.1.2).

Reason. Define the installation of wall-mounted appliances.

- For the selection of hemispherical enveloping surface, MAKE a division and

description. The radius is not limited to 1.5 m and 2 m. For small appliances

and household appliance parts etc., a test radius of 1 m can be used (7.1.4).

Reason. Define the method of selecting a hemispherical enveloping surface.

- ADD a test method for the operational noise of non-stationary appliances

(7.4.1). Reason. Define the test method for the operational noise of non-

stationary appliances.

- CORRECT the mis-presentation of the comparison-method calculation

formula in 8.5.Reason. Corrigendum.

- Delete Annex C. Reason. This Standard does not use the contents of Annex

C.

Attention is drawn to the possibility that some of the elements of this document

may be the subject of patent rights. The issuing authority of this document shall

not be held responsible for identifying any or all such patent rights.

This Part was proposed by China National Light Industry Council.

This Part shall be under the jurisdiction of National Standardization Technical

Committees on Household Electric Appliances (SAC/TC 46).

The previous editions of the standard replaced by this Part were released as

follows.

- GB/T 4214.1-2000;

- GB/T 4214-1984.

1 Scope and object

This Part of GB/T 4214 applies to electric appliances (including their

accessories or components) for household and similar use, supplied from

mains or from batteries.

2 Normative references

The following documents are indispensable for the application of this document.

For the dated references, only the editions with the dates indicated are

applicable to this document. For the undated references, the latest edition

(including all the amendments) are applicable to this document.

GB/T 3241-2010 Electroacoustics - Octave-band and fractional-octave-band

filters (IEC 61260.1995, MOD)

GB/T 3767-1996 Acoustics - Determination of Sound Power Levels of Noise

Sources Using Sound Pressure - Engineering Method in an Essentially Free

Field over a Reflecting Plane (eqv ISO 3744.1994)

GB/T 3785.1-2010 Electroacoustics - Sound level meters - Part 1.

Specifications (IEC 61672-1.2002, IDT)

GB/T 4129-2003 Acoustics - Requirements for the performance and

calibration of reference sound sources used for determination of sound

power levels (ISO 6926.1999, IDT)

3 Terms and definitions

For the purposes of this document, the following terms and definitions apply.

Terms and definitions pertinent to the determination of sound power levels may

be found in GB/T 3767-1996, GB/T 6881.2-2002, GB/T 6881.3-2002.

4 Measurement methods and acoustical environments

The total noise emitted by machinery or equipment and radiated in all directions

to the space surrounding the machine can be characterized by the sound power

of the machine. The sound power of a machine is essentially independent of

the environment in which the machine is installed. Therefore, the concept of

sound power level has been chosen for expressing the noise emission of

appliances for household and similar purposes.

5 Instrumentation

Requirements for the instrumentation system and for its calibration are given in

Clause 5 of GB/T 6881.2-2002, GB/T 6881.3-2002 and GB/T 3767-1996.

The instrumentation system shall meet the requirements for a type 1 instrument

laid down in GB/T 3785.1-2010, according to the basic standard used. For

measurements in octave bands, the instrumentation system shall meet the

requirements of GB/T 3241-2010.

6 Operation and location of appliances under test

The appliance is equipped with attachments, accessories, etc. as

delivered by the manufacturer for the intended use or function.

Appliances with mains powered electric motor(s) are supplied at rated

voltage and at rated frequency.

7 Measurement of sound pressure levels

The requirements of 7.1 to 7.4 of GB/T 3767-1996 shall be followed. Unless

otherwise specified in the particular requirements, the measurement surface

and microphone array in the particular requirements are specified as follows.

For a particular family of appliances, only one of the following two measurement

surfaces can be selected; the microphone can only select one of several

microphone arrays and one of the possible microphone arrays.

8 Calculation of sound pressure and sound power levels

For measurements in hard-walled test rooms, the requirements of 7.8 and

Clause 8 of GB/T 6881.2-2002 shall be followed. For measurements in special

reverberation test rooms, the requirements of 7.8 and Clause 8 of GB/T 6881.3-

2002 shall be followed.

If the background noise levels, Lp", are more than 6 dB below the measured

sound pressure levels, Lp', the values of Lp' shall be corrected to take into

account the influence of background noise.

9 Information to be recorded

Name and address of the laboratory where measurements are carried out.

File number and date(s) of measurements.

Name and address of the company, organisation or person, who ordered

the measurements.

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