Sloping Hearing Loss
Sloping hearing loss is an audiogram configuration in which hearing thresholds are relatively better at low frequencies and progressively worse at higher frequencies. When plotted on an audiogram, the threshold markers form a descending slope from left to right, indicating that the person hears lower-pitched sounds more easily than higher-pitched ones. A steep slope, sometimes called a ski-slope audiogram, reflects a pronounced drop in hearing at mid to high frequencies.
Sloping high-frequency hearing loss is the most common audiogram configuration in adults and is typically associated with aging (presbycusis) and noise-induced hearing loss. High-frequency hair cells at the base of the cochlea, which process sounds above 2,000 Hz, are most vulnerable to both cumulative noise damage and age-related deterioration. Because many consonant sounds (such as "s," "f," "th," and "sh") are high-frequency in nature, sloping loss disproportionately affects consonant discrimination and speech clarity, even when the overall loudness of speech is adequate.
Hearing aid fitting for sloping hearing loss focuses on boosting high-frequency amplification where the loss is greatest while providing less amplification at lower frequencies where hearing is relatively intact. Real ear measurement verifies that the fitting is meeting the high-frequency gain targets that account for the sloping configuration.
