Test method for noise of household and similar electrical appliances - Particular requirements for fan heaters
1 Scope and object
This clause of GB/T 4214.1-2017 is applicable except as follows:
1.1 Scope
1.1.1 General
Replacement:
This document is applicable to fan heaters, designed for placing on the floor, table or counter, etc., or for wall-mounting.
This document is not applicable to:
——electric storage room heaters;
——room humidifiers;
——room dehumidifiers;
——air cleaners
——heaters designed exclusively for industrial purposes.
1.1.2 Types of noise
Replacement:
The methods specified in GB/T 6881.2, GB/T 6881.3-2002 and GB/T 3767 can be used for measuring noise emitted by fan heaters.
1.1.3 Size of the source
Replacement:
The method specified in GB/T 3767 is applicable to noise sources of any size. When applying GB/T 6881.2 and GB/T 6881.3-2002, care should be taken that the maximum size of the appliances under test fulfills the requirements specified in 1.3 of GB/T 6881.2 and GB/T 6881.3-2002.
1.2 Object
Addition:
The frequency range of interest for sound power determination on fan heaters includes at least the octave bands with center frequencies from 63 Hz to 8,000 Hz.
Note 1: In many cases, the 63 Hz octave band level does not participate significantly to the A-weighted level.
Note 2: When measuring this 63 Hz octave band, a special attention should be paid to the room effect.
Requirements for the declaration of noise emission values are not within the scope of this document.
Note 3: For determining and verifying noise emission values, declared in product specifications, see IEC 60704-3.
1.3 Measurement uncertainty
Replacement:
See Table 101 for the estimated values of standard deviations of sound power levels determined according to this document.
Table 101 Standard deviations of sound power levels
Standard deviation/dB
σr (repeatability) σR (reproducibility)
0.4 1.0
1.101 Standard deviation for declaration and verification
Values specified in Table 102 shall apply for the purpose of determining and verifying declared noise emission values according to IEC 60704-3:
Table 102 Standard deviation of declared and verified values
Standard deviation/dB
σP (production) σt (total) σM (reference)
0.3 to 1.1 1.0 to 1.6 1.5
2 Normative references
The following documents contain provisions which, through reference in this text, constitute provisions of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
This clause of GB/T 4214.1-2017 is applicable.
3 Terms and definitions
This clause of GB/T 4214.1-2017 is applicable.
4 Measurement methods and acoustic environments
This clause of GB/T 4214.1-2017 is applicable except as follows:
4.2 Direct method
Addition:
Note: If pure tone components are present in the noise emitted, proper precautions should be taken as specified in GB/T 6881.3-2002.
4.3 Comparison method
Addition:
Note: If pure tone components are present in the noise emitted, proper precautions should be taken as specified in GB/T 6881.2 and GB/T 6881.3-2002.
Foreword i
Introduction iii
1 Scope and object
2 Normative references
3 Terms and definitions
4 Measurement methods and acoustic environments
5 Instrumentation
7 Measurement of sound pressure level
8 Calculation of sound pressure and sound power levels
9 Record content
10 Report content
Annexes
