Acoustic measurements of CPPS and AVQI pre and post speech therapy

Hofman, Eduarda Cristina; Dassie-Leite, Ana Paula; Martins, Perla do Nascimento; Pereira, Eliane Cristina

doi:10.1590/2317-1782/20232022136pt

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Original Article • CoDAS 35 (6) • 2023 • https://doi.org/10.1590/2317-1782/20232022136en linkcopy

Acoustic measurements of CPPS and AVQI pre and post speech therapy

Authorship SCIMAGO INSTITUTIONS RANKINGS

ABSTRACT

Purpose To compare the acoustic measurements of Cepstral Peak Prominence-Smoothed (CPPS) and Acoustic Voice Quality Index (AVQI) at pre- and post-voice therapy times.

Methods This is a before and after intervention study, with retrospective data collection. Twenty-two subjects with a mean age of 49.9 years participated in the study. The vocal therapy occurred between the years 2016 to 2019 in a teaching clinic, and the subjects had vocal samples collected before and after the therapeutic processes. CPPS and AVQI data extractions were performed during pre- and post-therapy. In order to characterize the sample, auditory-perceptual evaluation (APE) regarding the overall degree of vocal deviation at pre- and post-therapy moments was performed. The data were analyzed statistically.

Results The APE data indicated a decrease in the median values of overall vocal deviation degree at the post-therapy stage for both the vowel (p=0.00) and number (p=0.00) samples. The average CPPS for the vowel was 14.53 pre-therapy and 16.37 post-therapy (p=0.01); for the number emission, it was 8.22 pre-therapy and 9.06 post-therapy (p=0.02), there was a difference in the CPPS of the vowel and numbers indicating vocal improvement at post-therapy. The average AVQI was 2.27 pre-therapy and 1.54 post-therapy (p=0.05). There was an improvement in the AVQI results, with borderline p-value.

Conclusion Vocal therapy produced changes in the general degree of vocal deviation, as well as in CPPS and AVQI measurements, and the results at the post-therapy moment are similar to those of vocally healthy individuals.

Keywords: Voice; Voice Disorders; Acoustics; Voice Quality; Auditory Perception

Results VAS	Pre-therapy					Post-therapy					p
Results VAS	Mean	Median	Minimum	Maximum	SD	Mean	Median	Minimum	Maximum	SD	p
Vowel	66.68	62.00	44.00	91.00	12.37	44.77	44.00	22.00	78.00	13.96	^* * p<0,05 0.00004
Numbers	63.18	66.00	37.00	88.00	13.36	42.36	47.00	14.00	80.00	18.33	*0.0004

G vowel	G0 post	G1 post	G2 post	Total pre	G numbers	G0 post	G1 post	G2 post	Total pre
G vowel	n(%)	n(%)	n(%)	n	G numbers	n(%)	n(%)	n(%)	n
G1 pre	1 (100%)	0 (0%)	0 (0%)	1	G1 pre	3 (100%)	0 (0%)	0 (0%)	3
G2 pre	7 (35%)	8 (40%)	5 (25%)	20	G2 pre	6 (31.58%)	5 (26.32%)	8 (42.11%)	19
G3 pre	0 (0%)	0 (0%)	1(100%)	1	G3 pre	0 (0%)	0 (0%)	0(0%)	0
Total pre	8	8	6	22	Total post	9	5	8	22

CPPS VOWEL	Mean	SD	Median	Minimum	Maximum	p
Pre	14.53	3.94	14.58	3.45	22.01	^* * p<0.05 0.01
Post	16.37	2.42	16.7	10.72	21.65	^* * p<0.05 0.01
CPPS numbers	Mean	SD	Median	Minimum	Maximum	p
Pre	8.22	0.34	8.08	5.84	13.94	*0.02
Post	9.06	0.35	9.1	6.25	13.06	*0.02

Acoustic Measure AVQI	Mean	SD	Median	Minimum	Maximum	p
Pre	2.27	1.86	2.19	-1.04	7.46	0.05
Post	1.54	1.20	1.4	-1.1	4.37	0.05

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Sociedade Brasileira de Fonoaudiologia Al. Jaú, 684, 7º andar, 01420-002 São Paulo - SP Brasil, Tel./Fax 55 11 - 3873-4211 - São Paulo - SP - Brazil
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[1] Wilcoxon Test

[TFN100] ^*
p<0,05

[3] Caption: SD = standard deviation.