Evaluation -Objective and subjective ratings from an evaluation of appearance, size, safety, durability, ergonomics, ease of use, screen, printing, maintenance and accessories.
Printouts – Tympanogram printouts of the left and right ears as obtained from each of the four devices.
Results – Results on Compliance, Pressure, Ear Canal Volume and Gradient from performing sequential tympanometry three times on the right ear and three times on the left ear under similar conditions for each device.