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. 2021 Mar 11;64(6 Suppl):2213–2222. doi: 10.1044/2020_JSLHR-20-00268

Table 2.

Observed percentages of accurate automatic alignments (i.e., alignment intervals that cover the midpoint of the manual alignment).

Subset Aligner Accuracy (%)
All sounds (33,545) MFA-SAT 87
MFA-No-SAT 79
Kaldi 77
P2FA 69
Prosodylab 63
Plosives (9,149) MFA-SAT 85
MFA-No-SAT 75
Kaldi 75
P2FA 62
Prosodylab 51
Vowels (13,010) MFA-SAT 90
MFA-No-SAT 87
Kaldi 81
P2FA 76
Prosodylab 77
Fricatives (6,485) MFA-SAT 86
MFA-No-SAT 75
Kaldi 75
P2FA 62
Prosodylab 60
Others (4,901) MFA-SAT 80
MFA-No-SAT 70
Kaldi 72
P2FA 68
Prosodylab 55

Note. MFA = Montreal Forced Aligner; SAT = speaker adaptive training; P2FA = Penn Phonetics Lab Forced Aligner.