Subjects
Healthy participants excluded any otology disease nor vertigo complaints
were recruited in our experiments. When compared the three systems at
two different clinical center, 9 and 13 participants were recruited,
respectively. For the gaze angle experiments, we had 26 participants, 16
of whom we performed the inter-examiner evaluation. The informed
consents were obtained from the participants. The experimental
procedures in our study were in accordance with the ethical standards of
the institutional and/or national research committee and with the 1964
Helsinki declaration and its later amendments or comparable ethical
standards.