Fact · Dictation
A 2017 SAE paper concludes that AI% should be the preferred metric for relating cabin noise to speech recognition performance when the noise is steady.
Checked against its source on October 16, 2026
In the source's own words
“AI% should be the preferred metric to relate cabin noise to ASR performance in the presence of any other kind of steady state noise.”
The Effect of Vehicle Noise on Automatic Speech Recognition Systems, SAE International (Technical Paper 2017-01-1864), 2017, Abstract.
Open the original- What it measures
- The paper compares noise and vibration measures inside vehicles with the sentence error rate of speech recognition systems. AI% is an articulation-index measure of how much speech is masked.
- What it does not show
- The conclusion is about steady cabin noise. Road-surface noise and passing noise are not steady, and the abstract does not give error rate numbers.