Synopsis of key findings
Until
now, recordings of only 94 children have been evaluated, and the results
indicated that the method could yield precise information in evaluating
intelligibility. The ASR score is lower than the traditional assessment
score. In most cases, the ASR recognition gap is large, but when the
score is higher, the gap decreases. The possible reasons are as follows.
The intelligibility of speech depends on five factors: the speaker, the
speech (content familiarity), the content length, the grammatical
complexity or perplexity and the input medium.6 When
the ASR system assesses the intelligibility of speech from an
individual, it compares the spectral and temporal characteristics of the
signal of the acoustic speech samples with according transliteration.
The internal recognition system had been trained with acoustic
information from normal speech speakers, so the system will be only able
to accurately recognize speech that is highly intelligible and will be
more error-prone when given speech that differs greatly from normal
speech.
Strengths
and