The AuDX Pro Otoacoustic Emissions Measurement System is a handheld battery operated device that performs otoacoustic emissions tests. Connection to the patient's ear is via the Bio-logic ear probe. Using a combination of hardware and software, the system produces a controlled acoustic signal in the ear canal and measures the resultiing evoked emissions that are generated by the outer hair cells of the inner ear associated with normal cochlear function. The stimuli are presented via miniature receivers and the acoustic response in the external ear canal is recorded via a miniature microphone, all embedded in the Bio-logic OAE probe. The system collects and averages data samples until specified measurement parameters are achieved.
An electroacoustic instrument designed to evaluate the activity of the auditory pathway of the brain in response to an acoustic signal [auditory brainstem response (ABR)] it provides at the ear (e.g., clicks delivered through an earphone), without need of patient cooperation. The signal, detected via the device's scalp electrodes and possibly a reference electrode on the ear lobe, is measured using computer averaging and signal processing techniques. This device is typically used to assess the function of the auditory pathways and to differentiate coma due to metabolic factors from structural damage.
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