Hearing Health Guide
Definition
A speech discrimination score is a measure of auditory clarity obtained by presenting a standardized list of single-syllable words at a comfortable volume and recording the percentage the listener correctly repeats. Unlike pure-tone audiometry, which measures the softest sounds detectable, speech discrimination testing assesses how well the auditory system decodes speech once it's loud enough to hear. Scores are expressed as a percentage, with 90–100% considered normal.
Two people can have identical audiograms (the same pure-tone thresholds at every frequency) and have very different speech discrimination scores. This is because decoding speech involves the auditory nerve and central auditory pathways, not just the cochlear hair cells measured by pure tones.
A person with moderate high-frequency hearing loss might score 88% on word recognition. Their auditory system still decodes speech efficiently once it's amplified. Another person with similar thresholds might score 60%, suggesting retrocochlear pathology or central processing difficulties that amplification alone won't address.
90–100%: Normal. The auditory system decodes speech accurately at comfortable levels. 76–88%: Slight difficulty. Some words are missed; real-world performance may vary with noise. 60–76%: Moderate difficulty. Speech understanding is impaired even in good conditions. Below 60%: Significant difficulty. Hearing aids may improve audibility but clarity will remain a challenge.
Very low scores (below 50%) at comfortable presentation levels may indicate retrocochlear pathology (a problem in the auditory nerve or brainstem rather than the cochlea), which warrants further diagnostic workup including ABR (auditory brainstem response) testing.
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