Hearing Health Guide
Definition
Presbycusis is age-related sensorineural hearing loss caused by the cumulative deterioration of cochlear hair cells over a lifetime. It typically affects both ears equally, progresses slowly, and begins in the high frequencies. According to the NIDCD, approximately one in three adults between 65 and 74 has hearing loss, rising to half of those 75 and older.
The primary cause is the gradual death of cochlear hair cells: the sensory cells that convert sound vibrations into electrical signals. Human cochlear hair cells do not regenerate, so the loss is cumulative and irreversible.
Contributing factors include a lifetime of noise exposure, cardiovascular disease (which reduces cochlear blood flow), diabetes, smoking, and genetic predisposition. Not all age-related hearing loss is equally distributed. Lifestyle and health history significantly influence the rate of decline.
Because presbycusis targets high frequencies first, vowels (which are lower-pitched) remain audible while consonants (higher-pitched) fade. People say they can hear someone talking but can't make out what they're saying, particularly in noise.
Common situations: difficulty following conversation at restaurants, needing the TV louder, frequently asking people to repeat themselves, phone calls becoming harder than face-to-face conversation.
There is no cure for presbycusis. The underlying hair cell loss cannot be reversed. Hearing aids are the primary intervention, amplifying the frequencies where sensitivity has declined. For severe-to-profound loss, cochlear implants are an option.
Research consistently shows that treating presbycusis has benefits beyond hearing: reduced cognitive load, better social engagement, and associations with slower cognitive decline.
Common Questions