Air-Borne Noise Control for a Quieter Dishwasher

Ricky Kim , Wayne Mason

New Zealand Acoustics, 17(2), pp.6- 10 . (2004).

Quiet Consumer Appliances are becoming more important every day. Here noise from a Fisher & Paykel “Dishdrawer” Dishwasher is measured using sound intensity to determine the dominant noise generating areas, and develop a quieter product by applying air&borne noise control techniques. The lower area (kick space) of the dishwasher has some holes and is close to the lower motor, and is shown to be one of the major noise sources. Double sealing in this area—sealing the motor and sealing holes in the kick space—provides a 3.4dBA reduction in the total sound power level of the unit.