A hearing assistance device including: a microphone arranged to receive sound of an environment in which the hearing assistance device is located; a wireless communication device arranged to wirelessly communicate data with an external device; a controller operably connected with the microphone and arranged to process the received sound using sound processing settings that have been determined using a trained machine learning processing model; and a speaker operably connected with the controller and arranged to output the processed sound. The sound processing settings have been determined using the trained machine learning processing model based on a hearing response of a user and one or more properties of the environment.