Oscillatory Onset and Offset in Young Vocally Healthy Adults Across Various Measurement Methods.
Rita R Patel, Reuben Walker, Michael Döllinger
PMID 28169095WHAT IT FOUND
Different ways of timing vocal fold vibration onset gave partly overlapping values in healthy young adults, and onset timing did not track offset timing.
Choose the measurement based on whether the question is about onset or offset.
Key findings
01The three onset timing methods were positively related, but OOT aligned less closely with VIP and POT than VIP and POT aligned with each other.
02The two offset timing methods showed a moderate positive relationship.
03Onset timing did not track offset timing within the compared methods.
STILL TO COME
How it was doneWhat they foundWhat it means for SLPs
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What it does not show
The study included only vocally healthy adults, so it cannot show how these methods behave in people with voice disorders. Twenty-one of ninety-two recruited adults did not yield usable recordings because of heightened gag reflex, so the analysed group was not the full recruited group. The recordings used only /hi.hi.hi/, and the offset was unconstrained, which may limit what offset timing captures. The reliability check covered only 20 randomly selected participants and was done by one rater. The study did not test whether any measurement method helps diagnose or treat voice disorders.
Declared interests
The supplied text states no conflict of interest. It gives no funding details.
The easy way to misread this
Do not read these timing methods as interchangeable or as tests for voice disorder. The onset methods only partly agreed with each other, onset and offset were unrelated, and the participants were vocally healthy adults, so the study does not show that any method identifies pathology.