An exemplary electro-acoustic stimulation (“EAS”) system (100) includes 1) an off-the- ear sound processor module (102), 2) a headpiece module (104) communicatively coupled directly to the off-the-ear sound processor module (102) and configured to be affixed to a head of a patient, the headpiece module (104) comprising a housing with communication circuitry disposed therein that is configured to facilitate communication by the off-the-ear sound processor module (102) with a cochlear implant (106) implanted within the patient, and 3) a loudspeaker (110) communicatively coupled directly to the headpiece module (104). The off-the-ear sound processor module (102) is configured to direct the cochlear implant (106) to apply electrical stimulation to the patient and direct the loudspeaker (110) to apply acoustic stimulation to the patient. Corresponding systems, devices, and methods are also disclosed.
