High-frequency describes the pitch of a sound in the treble range. Frequency is measured in Hertz (Hz). A high frequency is considered a sound above 3000 Hz.
A high-frequency hearing loss is common in older adults and those who have noise-induced hearing loss. A high-frequency hearing loss can cause difficulty with speech clarity, due to the inability to hear certain consonant sounds of speech such as the /s/, /sh/, /th/, and /f/ sounds.