Audiometric Evaluations: Adults & Pediatrics: Pure-tone Audiometry: Hearing sensitivity or loss is quantified by using pure tones controlled by a dual-channel clinical audiometer and presented through earphones and a bone vibrator. Narrow-band masking noise is used when appropriate.
Speech Audiometry: Awareness of speech sensitivity, auditory discrimination of speech sounds, and hearing adequacy for everyday speech are evaluated with speech delivered through earphones and loudspeakers. Phonetically balanced work lists are presented to the patient via the clinical audiometer by monitored live voice or taped recordings.
Impedance Audiometry: The middle ear and the acoustic reflex are assessed with a clinical electroacoustic bridge, which can activate the acoustic reflex with either contralateral or ipsilateral test tones. Eardrum mobility and middle ear pressure are evaluated ipsilaterally.
ABR-Screening: Auditory brainstem response (ABR) is a diagnostic test which is similar to an electroencephalogram (EEG). This procedure involves the use of clicking sounds to stimulate the auditory nerve, which produces an electrical response. Electrodes placed on the patient's face and ears pick up the electrical activity of the nerve, and a computer displays the results for the audiologist to interpret. Also known as BERA, BAER.