Impact of Temporal Processing Impairments on Speech Perception in Individuals with Tinnitus : A Narrative Review
摘要
Tinnitus is often associated with speech perception difficulties, particularly in noisy environments. Temporal processing is a critical element in word recognition during speech perception. The influence of tinnitus on speech comprehension may involve temporal resolution deficits, hearing loss, selective attention issues, or other auditory processing impairments. This review aimed to synthesize findings on the effects of tinnitus on temporal processing and speech perception. A comprehensive literature search was conducted in Google Scholar, Springer, Science Direct, Scopus, and PubMed databases for studies published between 1998 and 2024, using keywords related to tinnitus, temporal resolution, and speech perception. From 52 initially identified studies, 19 with the highest relevance to temporal resolution deficits in individuals with tinnitus were selected through purposive sampling. Evidence indicates that tinnitus-related speech perception deficits are not solely attributable to peripheral hearing loss but also to central auditory processing dysfunction. Temporal processing disorders—such as reduced temporal resolution—suggest lesions or maladaptive changes in the peripheral and/or central auditory systems. Such deficits hinder accurate tracking of rapid acoustic cues, reducing intelligibility, especially in noisy conditions. Neurophysiological studies implicate altered cortical oscillations, inhibitory dysfunction, and central gain enhancement as key mechanisms. Tinnitus can significantly degrade temporal resolution, affecting speech understanding in both quiet and noisy environments. Comprehensive assessment of temporal processing abilities alongside speech perception tests can improve diagnostic accuracy and guide targeted management strategies. Interventions that address central auditory processing may offer meaningful benefits for tinnitus rehabilitation.