Fig. 3

Flowchart of the protocols used for tests in the Validation study. During Test 1 the otoscope was manually held in the ear canal by either the researcher or the participant. In Tests 2 and 3 the otoscope was mounted in a set of modified ear defenders referred to as Ear Defender setup. During the tests participants followed instructions from the laptop located in front of them. In the first two tests, the different movements were performed after a three second audible and visual countdown followed by a visual ‘Go!’ and audible ‘bleep’. During Test 3 participants were instructed to react by rumbling upon the appearance of the ’Go! Hit 1 time!’ prompt