4.2 Control Group (Healthy Subjects)
In terms of the Freiburg monosyllables word test in quiet at 65 dB SPL, the mean speech intelligibility score in the unaided situation (40.0% ± 15.5%) was significantly improved to 75% ± 11.3% using the BAHA 5 Power system (p < 0,01) and to 73.0 ± 15.9% using the ADHEAR system (p < 0.01).
At 5 dB SNR, the speech intelligibility scores in the unaided situation decreased from 40.0% ± 15.5% in quiet to 19.0 ± 12.4%. The mean speech intelligibility score in the unaided situation was significantly improved to 49.0% ± 9.7% using the BAHA 5 Power system (p < 0,01), and to 41.0 ± 23.2% using the ADHEAR system (p < 0.05).
4.3 Questionnaire
In summary of the questionnaire, three patients of group 1 and two healthy subjects of the control group reported on problems with the adhesive adapter over time. Main factors were sweating and leisure activities. The lack of adhesion leads to an inadequate coupling and inadequate transmission. However, no adverse reactions against the adhesive adapter were reported. Most of the participants (70%) reported on sound quality and speech understanding, similar to a softband BAHA.