AS ISO 6395:2020 Earth-moving machinery一Determination of sound power level一Dynamic test conditions.
AS ISO 6395 specifies a method for determining the noise emitted to the environment by earth-moving machinery, measured in terms of the A-weighted sound power level while the machine is operating under dynamic test conditions.
It is applicable to earth-moving machinery as specified in Annex A and as defined in ISO 6165.
2 Normative references
The following referenced documents are indispensable for the application 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.
ISO 3744:fl, Acoustics — Determination of sound power levels and sound energy levels of noise sources using sound pressure — Engineering method for an essentially free field over a reflecting plane
ISO 6165, Earth-moving machinery — Basic types — Identification and terms and definitions
ISO 6393:2008, Earth-moving machinery — Determination of sound power level — Stationary test conditions
ISO 9249, Earth-moving machinery — Engine test code — Net power
IEC 61672-1, Electroacoustics — Sound level meters — Part 1: Specifications
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 3744, ISO 6165 and the following apply.
time-averaged A-weighted sound pressure level
A-weighted sound pressure level averaged on an energy basis over the whole measurement period, T
A-weighted sound power level
quantity obtained from the time-averaged A-weighted sound pressure levels averaged over the measurement surface on an energy basis
basic length
length used to define the radius of the measurement hemisphere
Note 1 to entry: The dimension of the basic length, I, is determined in Annex A.
3.4 Machine centre point
machine centre point
(all machines, except those with slewing upper structure) midpoint of the basic length, I, at the machine longitudinal centre line
machine centre point
(machines with slewing upper structure) centre of rotation of the upper structure
3.5 Fan speed
maximum working speed of the fan
fan speed at which the fan provides maximum cooling performance for the machine under the most severe operating conditions
fan drive with continuous variable fan speed
fan drive that varies the fan speed continuously throughout a variable range to minimize its speed for the needed cooling performance in relation to the heat load.AS ISO 6395 pdf download.