Robot vacuums are ideal for multitaskers and are frequently quieter alternatives to a standard vac. Your housemates and pets won't be bothered by the iMartine Robot Vacuum Cleaner ($116, originally $137) thanks to its exceptionally low noise volume (under 58dB). This vacuum in particular is slimmer than other vacuums, allowing it to comfortably clean tight corners and under furniture. The vacuum holds a positive 4.3-star rating from over 3,400 Amazon customers, and it's easy to see why.