About Hearing Loss

Humans are born with about 15,000 hair cells in the cochlea of each ear. Hair cells are commonly lost due to noise exposure in work settings or as a result of aging, certain viral infections or exposure to medicines that are toxic to ears.

Lost Sensory Hair Cells and Hearing

These lost hair cells do not spontaneously regenerate, leading to progressive degrees of hearing loss. This condition is called sensorineural hearing loss (SNHL), which impacts more than 90 percent of all people with hearing loss.

While hearing loss is often thought to be caused by aging, the condition is strongly correlated with living in an industrialized society and associated noise exposure and other environmental factors.

Our Approach to Regenerating Lost Cochlear Hair Cells

Frequency’s lead program, FX-322, is designed to activate progenitor cells in the inner ear to regenerate damaged auditory cells and repair hearing loss. A Phase 1/2 study has demonstrated a statistically significant and clinically meaningful improvement in key measures of hearing loss, including clarity of sound and word recognition, and a favorable safety profile.

FX-322 is designed to be a disease-modifying therapy that repairs the underlying biology that causes hearing loss.

FX-322 is administered through the eardrum (intratympanically) and into the middle ear in a procedure that takes approximately 10 to 15 minutes, and is a routine, office-based procedure for ear, nose and throat specialists.

Measuring Hearing Loss

The two primary ways to measure hearing are intelligibility, or the ability to understand spoken words, and the audibility, or loudness, of sound.

Today, there are no FDA-approved medical therapies for the treatment of hearing loss. While amplifying devices such as hearing aids can make sounds louder, they have limited ability to improve intelligibility, particularly in noisy environments. Intelligibility is particularly important to understand speech in social settings such as in meetings or at restaurants, where filtering sound is critical for communication.