Though we don't know of any models specifically for those whose hearing is impaired, there are some which are suitable. Many have volume controls, though you need to check just how loud they'll go. Perhaps more convenient are wireless doorbells with strobe lights in addition to chimes. While you do need to take some care positioning the receiver, strobes can be picked up by peripheral vision, so you don't need to be staring straight at them. A third possibility is a smart wireless doorbell that calls your phone. If the phone is set to vibrate, and kept in a pocket, you get a physical alert when someone was at the door.