Can I use my portable sound machine (Rohm, Hushh,or Go) while it's plugged in and charging? May 12, 2020 16:37 Yes, all of our portable sound machines are operable and can be turned on while charging. Related articles Are the USB cables for the Rohm and/or Hushh units compatible with the adaptive fast charging power adapters? My Hushh sound machine won't shut off. Help! How do I charge my Hushh, Rohm, or Go? How long will the battery last on the Travel Mini Sound Machine? Can I use my sound machine in the nursery?