Why can hearing loss make it harder to understand conversations in groups?

As people age, they often experience a condition known as presbycusis, which is the gradual decline of hearing function. A primary physiological factor in this process is the loss of cochlear hair cells, which typically begins at the basal end of the organ of Corti.1

This degeneration results in a reduced ability to perceive high-frequency tones, which are essential for distinguishing between different voices and understanding speech. Because high-frequency sounds are critical for clarity, their loss makes it significantly harder to follow conversations, especially in group settings where multiple voices and background noises are present.21

While an individual may still be able to hear lower-frequency sounds, the inability to process high-frequency information often causes speech to sound muffled or unclear. Consequently, even if voices are loud enough to be detected, they may lack the necessary definition for the brain to interpret the words correctly, leading to increased difficulty in social interactions.12