A combined sensor assembly used in conjunction with a patient includes at least one electrical sensor that is capable of detecting electrical signals that are indicative of a physiological parameter. The at least one electrical sensor is coupled to the patient by means of an electrically conductive gel material. The sensor assembly further includes at least one acoustic sensor that is coupled to the patient using an acoustically conductive gel material. The conductive gel material used in conjunction with the at least one acoustic sensor and the at least one electrical sensor can be the same or a different material, wherein a transducer of the acoustic sensor and the acoustically conductive gel define an interface region that is essentially devoid of air.