This Westinghouse dishwasher was a one wash two rinse machine with a little round screen cup to hold the detergent.  The power booster for heating the wash water greatly extended the wash time since it only raised the water temperature about a degree a minute While these could wash soil off dishes, Westinghouse used a small intermittent duty motorized pump for draining. It had a strainer so the machine did not dispose of solid soil like the GE bow tie impeller machines with the pump that ground up stuff and pumped it out. We went to look at one of these in 1959 or 60 at Davison's in Atlanta. Only the deluxe model had the switch for the power booster and once my parents were told that the machine did not have a pre-rinse, that was it. Their friends who had dishwashers said to make sure to get a machine that had a pre-rinse before the wash.  Everything we saw in a portable was top loading, but the GE we bought had a generous u-shaped opening in the top rack so that the only times it had to be removed was when we washed the oven racks and bottom or the round grill from the charcoal grill. Even the Revere Ware 6 qt. Dutch Oven fit through the opening to go in a corner of the lower rack.  It also had two power pre-rinses before the main wash. Even though we did not wash mom's precious cast  iron skillets in the dishwasher, she would put them in the sink under the Unicouple and give them a quick swish with the wash water as it drained then a fast rinse and a dry. They never rusted or lost their seasoning and they were the good Wagner (and one Griswold) pans with the glass smooth interiors. The GE washed great, but we supplied it with 160F water and used a commercial chlorinated detergent. About the noise; when the lower rack had lots of plates, they channeled the water up to the insulated lid of the machine. Mom would remark that it was really chugging because the sound was muffled. Mixed loads allowed more water to hit the single thickness tub  and it made more noise with those.

The KitchenAid KD2P portable had insulted tank walls, like this Westinghouse and most of the noise comes from the water hitting the single panel lid so I fold a towel and place it on the lid to reduce noise. One of those heavy old Rubbermaid stove mats would dampen the resonance very well, too.