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Noteworthy Characteristics of Lift Truck Noise Test Standards
Technical Paper
2007-01-2409
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
Several test standards exist for measuring lift truck sound levels, both for operator's ear sound levels and exterior (sound power) levels. All of the test standards result in the reporting of a single-number sound level that is a weighted average of the measured sound levels in various operating modes.
This paper presents the results of calculations based on actual measured data that clarify the sensitivity of the reported sound levels to the sound levels in the individual modes. The results show that for both of the common operator's ear noise test standards, the reported sound levels are typically very insensitive to the idle sound level even though the idle sound level is given a much higher weighting factor than the other modes.
Also of interest are the lift truck sound power test standards. The test procedures include a driving test mode that is derived from the ISO 6395 earthmoving machinery test standard. Measured data and calculations are included that illustrate some unique aspects of this test mode.
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Topic
Citation
Hamilton, D., "Noteworthy Characteristics of Lift Truck Noise Test Standards," SAE Technical Paper 2007-01-2409, 2007, https://doi.org/10.4271/2007-01-2409.Also In
SAE 2007 Transactions Journal of Passenger Cars: Mechanical Systems
Number: V116-6; Published: 2008-08-15
Number: V116-6; Published: 2008-08-15
References
- British Industrial Truck Association, Ltd. Recommend Practice RP 20 “Measurement of Noise Emitted by Lift Trucks.” 1987
- Industrial Truck Standards Development Foundation Standard B56.11.5-2005 (Reaffirmation of ASME B56.11.5-1992) “Measurements of Sound Emitted by Low Lift, High Lift and Rough Terrain Powered Industrial Trucks.” 2005
- European test standard EN12053:2001 “Safety of Industrial Trucks - Test Methods for Measuring Noise Emissions.” 2003
- “Directive 2000/14/EC of the European Parliament and of the Council of 8 May 2000 on the approximation of the laws of the Member States relating to the noise emission in the environment by equipment for use outdoors.” Official Journal of the European Communities 2000
- ISO 6395 “Acoustics - Measurement of Exterior Noise Emitted by Earth-moving Machinery - Dynamic Test Conditions.” International Organization for Standardization Geneva, Switzerland 1988
- ISO 3744 “Acoustics - Determination of Sound Power Level of Noise Sources -- Free-Field Conditions Over a Reflecting Plane,” International Organization for Standardization Geneva, Switzerland 1994
- Beranek, Leo L. Ver Istvan L. Noise and Vibration Control Engineering, Principles and Applications John Wiley & Sons 1992