DEVICE: GN Otometrics A/S (05713315000713)

An electroacoustic device designed to measure the hearing threshold of a patient by presenting tones of increasing or decreasing intensity through headphones to establish the level at which the patient first becomes aware of the sounds. The device automatically produces tones that sweep the audiometric scale while the patient controls intensity, typically by pressing a button, when the tone cannot be heard. The device also records the patient's responses. This device may have the capacity to present a fixed frequency or a steadily changing frequency. It may also provide both continuous and pulsed tone outputs.