What is Aided Speech Intelligibility Index in Audiology?

A calculated measure estimating the proportion of the long-term average speech spectrum that is audible and usable to a hearing aid user, weighted by the importance of each frequency band for speech understanding.

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Audiology Glossary

100 terms total — 1 showing — Last updated 15 Sep 2026

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sensorineural hearing loss

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Hearing impairment caused by damage to the inner ear or auditory nerve pathways.

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Aided Speech Intelligibility Index

Professional Technical IVT

A calculated measure estimating the proportion of the long-term average speech spectrum that is audible and usable to a...

SII Speech Intelligibility Index

Technical Term Full entry →

Glossary terms, with category, difficulty and definition
Term	Category	Difficulty	Definition
Aided Speech Intelligibility Index IVT	Technical Term	Professional	A calculated measure estimating the proportion of the long-term average speech s...

Glossary Stats

Total terms 100

IVT eligible 97

Verified 0

basic 19

intermediate 45

advanced 18

professional 18