## 3 Results
### Case 1  
The patient was a 58-year-old male with left superior canal dehiscence syndrome and middle ear malformation. He used an AC-HA on the left, but was not satisfied with the effect, so he requested another device to try and participated in this trial. His air conduction hearing thresholds are 25 (125 Hz)-30 (250 Hz)-35 (500 Hz)-25 (1 kHz)-10 (2 kHz)-25 (4 kHz)-60 (8 kHz) dB HL on the right and 75 (125 Hz)-75 (250 Hz)-80 (500 Hz)-70 (1 kHz)-40 (2 kHz)-50 (4 kHz)-90 (8 kHz) dB HL on the left. His bone conduction hearing thresholds are 25 (250 Hz)-30 (500 Hz)-25 (1 kHz)-5 (2 kHz)-20 (4 kHz) dB HL  
\begin{table}
\begin{tabular}{c c c c c c c c c c c} \hline \hline \multirow{2}{*}{**Case**} & \multirow{2}{*}{**Disease**} & \multirow{2}{*}{**Sex**} & \multirow{2}{*}{**Age** **(Years)**} & \multirow{2}{*}{**Status**} & \multicolumn{4}{c}{**Hearing Thresholds (dB HL)**} & \multicolumn{2}{c}{**Sound Localization Test**} & \multirow{2}{*}{**GBI**} \\ \cline{5-10}  & & & & **250** & **500** & **1000** & **2000** & **4000** & & **RMS** & **(Points)** \\ \hline \multirow{5}{*}{1} & & & & BE BC & 25 & 30 & 25 & 5 & 20 & & \\  & Lt. superior canal & & & BE AC & 30 & 35 & 25 & 10 & 25 & & \\  & dehiscence & & & AE BC & 30 & 45 & 25 & 25 & 40 & & \\  & syndrome & & & AE AC & 75 & 80 & 70 & 40 & 50 & 31 & \\  & middle ear & & & CC-HA & 60 & 50 & 30 & 25 & 65 & 44 & 8.3 \\  & malformation & & & Baha & 45 & 40 & 35 & 20 & 55 & 28 & 8.3 \\  & & & & ADHEAR & 60 & 60 & 50 & 30 & 60 & 26 & 8.3 \\ \hline \multirow{5}{*}{2} & & & & BE BC & 20 & 20 & 30 & 50 & 50 & & \\  & & & & BE AC & 25 & 25 & 35 & 45 & 55 & & \\  & & & & AE BC & 30 & 35 & 50 & 65 & 60 & & \\  & & & & AE AC & 85 & 100 & 110 & 105 & 115 & 79 & \\  & media & & & CC-HA & 50 & 50 & 50 & 85 & 100 & refused test & 11 \\  & & & & Baha & 30 & 45 & 60 & 75 & 80 & 56 & 19 \\  & & & & ADHEAR & & No trial (the device immediately peeled off from skin) & & & \\ \hline \multirow{5}{*}{3} & & & & & RT. BC & 45 & 45 & 30 & 50 & 50 & \\  & & & & RT. AC & 75 & 75 & 60 & 50 & 115 & & \\  & malformation of & & & Lt. BC & 25 & 25 & 30 & 15 & 30 & & Not performed & \\  & external and & & & Lt. AC & 60 & 55 & 35 & 30 & 45 & (bilateral hearing loss) & \\  & & & & CC-HA & 25 & 20 & 20 & 25 & 50 & & 22 \\  & & & & Baha & 20 & 30 & 20 & 30 & 60 & & 19 \\  & & & & ADHEAR & 35 & 45 & 35 & 30 & 50 & & 33 \\ \hline \multirow{5}{*}{4} & & & & BE BC & & & & & & & \\  & & & & BE AC & 20 & 20 & 25 & 15 & 20 & & \\  & & & & AE BC & 25 & 25 & 25 & 25 & & & \\  & & & AE AC & 50 & 65 & 70 & 65 & 50 & refused test & \\  & & & & CC-HA & 55 & 50 & 45 & 50 & 60 & 14 & 14 \\  & & & & Baha & & & No trial (do not want to undergo operation) & & \\  & & & & ADHEAR & & & No trial (the device immediately peeled off from skin) & & \\ \hline \multirow{5}{*}{5} & & & & BE BC & & & & & & & \\  & & & & BE AC & 15 & 10 & 10 & 5 & 0 & & \\  & & & AE AC & 15 & 15 & 10 & 10 & 5 & & \\  & & & AE AC & 90 & 80 & 70 & 70 & 30 & & \\  & & & & CC-HA & 55 & 55 & 40 & 40 & 50 & 36 & 25 \\  & & & & Baha & 45 & 5  
This graph shows the results of the sound localization test without hearing aids and with cartilage conduction hearing aids (CC-HA), Baha, and ADHEAR. The horizontal axis represents the number of the speaker sounded, and the vertical axis represents the speaker number as per the patient's response. The size of the circles in the graph is proportional to the number of times the patient responded with the number of each speaker. The circles on the slanted line indicate correct answers. The larger the circle is from the slanted line, the more times the patient answered the incorrect speaker. A lower score indicates a more accurate sense of direction. In case 1, the score worsened with CC-HA, but improved in Baha and ADHEAR. In case 2, the score improved with Baha. In case 5, the score worsened with CC-HA and ADHEAR, whereas Baha showed little change, albeit slight improvement. In case 1, the score indicated that all devices improved the QOL to the same extent. In case 2, Baha showed greater improvement than CC-HA.