Abstract: A device, system and related methods to provide assessment and treatment of amblyaudia through standardized methods that do not require advanced training or a booth with loudspeakers for the operator to administer. The ARIA stimuli protocols for both assessment and treatment, encoded in or to be used by a software program or application, are transferred to a stand-alone set of specialized noise-cancelling headphones attached or connected to, wired or wirelessly, a software platform on an electronic computing device. or integrated with the headphones. The program administers assessment tests to individuals through the noise-cancelling earphones. The device enables someone with minimal instructions to administer automatically or semi-automatically both assessment and treatment protocols, generate results, make interpretations, store data, and produce reports. The device or system may be loaded with standard protocols for English-speaking individuals, as well as dichotic speech material in any language.