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Services

Optical Coherence Tomography (OCT) Imaging

Description: OCT uses infrared light to image tissue. It is like ultrasound, but it provides higher resolution images. In Doppler mode, it can measure how tissues vibrate in response to sounds. We use OCT to image the ear canal, the eardrum, the middle ear bones and the cochlea. We use either a microscope, an endoscope ... Read More »

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High-Speed Laryngeal Imaging

Description: This evaluation consists of taking high-resolution video endoscopy of vocal fold vibration at 4,000–8,000 frames per second. This allows for true visualization of actual vocal fold vibration cycles that occur from 80–1,000 times per second as well as advanced analysis called kymography.

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High Definition Laryngeal Imaging

Description: This is a 15-minute in-office endoscopic evaluation of your vocal folds and laryngeal function, including xenon light, stroboscopic light and narrow-band imaging. It is performed while the patient is awake, in high-definition with video recording and frame-by-frame analysis. This painless study uses a scope passed into the mouth or through the nose to visualize ... Read More »

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Hidden Hearing Loss

Description: Not all hearing loss is located within the cochlea, in the organ of hearing. The synapses, which are connection points between sensory cells in the cochlea and the nerve fibers poised to take the information to the brain, can also wear out or incur damage. This auditory deficit is still under study in humans, ... Read More »

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Extended Frequency Range Cochlear Map

Description: Extended frequency range cochlear map testing uses swept-tone stimuli to measure combined distortion product and stimulus-frequency otoacoustic emissions from 1 to 16 kHz, well beyond conventional audiometric ranges. This test provides an extended and nuanced personal map of cochlear output in response to pure tones or pairs of pure tones. Cochlear health and sensory ... Read More »

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Efferent Reflex

Description: The cochlea can be regulated by nerve fibers coming down from the brain and brainstem to the ear; this is called an “efferent reflex” and it turns down the cochlear response to incoming sound. In doing this, the efferent reflex protects the ear from overly loud sound; it also seems to help individuals listen ... Read More »

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Behavioral Audiometry

Description: A standard diagnostic hearing evaluation assesses hearing sensitivity across different frequencies (250Hz–8,000 Hz) via insert earphones for air conduction and via a bone oscillator for bone conduction. This test determines the degree, type and configuration of hearing loss (if any). In addition to the standard clinical exam, we will determine thresholds for extended high ... Read More »

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Acoustic Immittance Testing

Description: Acoustic immittance tests objectively evaluate the eardrum and the middle ear space behind the eardrum, as well as a muscle reflex that involves the eardrum and middle ear, the inner ear, the auditory nerve, the auditory brainstem pathways and the facial nerve. Testing includes measuring tympanometry, acoustic reflex threshold (ART) and acoustic decay.

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Voice Range Profile

Description: Also known as a phonetogram, this half-hour study creates a graphical representation of the minimum and maximum loudness across the entire range of pitch that a person can produce.

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Keck Medicine of USC
Univeristy of Southern California
Keck Medicine of USC
Keck Medicine of USC
Keck Medicine of USC is the University of Southern California’s medical enterprise, one of only two university-owned academic medical centers in the Los Angeles area.