Speech intelligiblity tests such as rhyme tests

Question

Can anyoe point me to .wav files or the like for speech intelligiblity tests, e.g. Rhyme tests "not, tot, got, pot, hot, lot" ? What I want are reproducible tests for various hearing aids and settings, in a quiet room, not speech-in-noise. (I'm an old guy with high-frequency hearing loss -- https://hearingtest.online says 4 kHz ~ 30 dB down from 2 kHz.) Any European language would be ok.

((I'd really like to know if hearing aid equalizers can flatten out high-frequency drop, specifically Phonak P30, but how to measure the effect on speech ?)

Answer 1

A good metric for speech intelligibility is the Short-Time Objective Intelligibility (STOI). Since your targets are hearing aids, if you manage to have a some sample audios recorded at the aid output, then you can use STOI among other metrics presented by speechmetrics to estimate the quality of the audio in comparison to the reference (the original sound). These metrics might be targeting speech generation but they should still be valid in your use case .

Regarding the high frequency drop, I suggest looking for the frequency response of your specific aid. Then examining the response in the region of human speech frequency range.

Alternatively, if you have the frequency response you can simply convolve it with any speech sample and then convolve the same sample with a "perfect / expected frequency response". Finally visualise the difference.

Best of luck with this :)