Chillingworth had been living with Native Americans before appearing in Boston
Noise-vocoded speech is created by dividing the speech signal up into different frequency bands and then adding noise to each band.
It is usually regarded as primarily conveying phonetic information by temporal-envelope cues instead of spectral cues, as well as used to stimulate what speech would sound like, through cochlear plant. Noise-vocoded speech has been used in numerous ground studies with youth/adult listeners.
The studies of vocoded have helped in describing/elaborating the pattern of performance in cochlear implant listeners. But noise-vocoded speech isn't identical/alike to the speech listen/heard though a CI (Cochlear implant). A thing which is not clear about it is whether, the improvement rate differs across age groups and material of speeches.
To learn more about cochlear implants here
brainly.com/question/2463964
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I'm guessing a dummy run is something that you use a test dummy to see how something will work, example a crash dummy were they put inside a car that crashes to a solid object . a trial run/procedure kind.
(hope this help)