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Solutions-Based Approach for Reducing Noise in …（基于解决方法减少噪音u2026）
Solutions-Based Approach for
Reducing Noise in Washing Machines
Dev Barpanda and Jay M. Tudor, The Dow Chemical Company, Midland, Michigan
A washing machine has more potential noise sources compared
Nomenclature
to other large household appliances. This is due in part to the
presence of complex dynamic assemblies and subsystems confined LP Sound pressure level (dB re 20 μPa)
-12 2
to fit within a tight design space. Due to varied governmental stan- LI Sound intensity (dB re 10 W/m )
dards worldwide, increased washing machine design complexity, LW Sound power level (dB re 10-12 W)
K r c /400
and the need for faster product development cycle and time to 0 0 2
market, it is essential to develop a more systematic methodology Si Area of each segment (m )
to address noise issues. This article focuses on a product-neutral,
solutions-based approach to mitigate overall sound power level has been popular – with only one chamber for clothes (not stack-
(as tested per IEC60704 guidelines) of a front-loaded washer-cum- able washer/dryers). These combination washer-dryers are either
dryer machine. A six-sigma based methodology has been used vented or non-vented. While vented combination units expel air
to identify root causes through a combination of sound pressure through a vent, non-vented units have a two-drum system. The ho
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