Table 1.

Summary of Experimental Conditions and Results in Published ADRO Studies

Study	No of Subjects	Device Hardware	Comparison Amplification Scheme	Speech in Quiet at Low Input Level	Speech in Noise	Preferences Assessed by Questionnaire
James et al., 2002	9 adults	SPRINT CI	ACE and SPEAK	16% improvement	No significant difference	Eight subjects preferred ADRO
Dawson et al., 2004	15 children	SPRINT CI	ACE	8.6% improvement	6.9% improvement	11 children preferred ADRO in most situations
Martin et al., 2001a, 2001b	15 adults with moderate to profound loss	Laboratory HA	Linear NAL-RP	36.4% improvement	7.0% improvement
Blamey et al., 2005	19 adults with moderate to profound loss	BTE HA	3-channel compression NAL-NL1	14.2% improvement	7.3% improvement	ADRO preferred in 74% of situations
Blamey et al., 2004a	22 adults with mild to moderate loss	ITE HA	9-channel compression NAL-NL1	7.9% improvement	7.3% improvement