Razak, Siti Sufiah Abdul (2025) Characterization of acoustic parameters of resonant /m/ and /n/ sounds for the development of objective indicators of resonant voice therapy. Masters thesis, Universiti Sains Malaysia.
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Abstract
Resonant voice therapy (RVT) is an evidence-based intervention for voice disorders, often initiated with nasal sounds such as /m/ and /n/. Resonant voice (RV) is usually verified through auditory and tactile feedback under a speech-language therapist’s (SLT) guidance, but these perceptual methods are limited outside clinical settings. The present study aimed to identify objective acoustic parameters that could indicate RV and support tangible feedback tools for self-guided practice. Ninety participants (45 females, 45 males) contributed data for /m/, and 83 (41 females, 42 males) for /n/. After RV training, each provided three 6-second recordings of RV and typical voice (TV). The middle 3 seconds were analyzed in Praat to extract fundamental frequency (F0), formants (F1–F4), F0 standard deviation (F0SD), perturbation measures, cepstral peak prominence (CPPFull, CPPVoice), harmonic-to-noise ratio (HNR), and mean intensity. Significant differences (p < 0.05, medium effect size) were found in APQ3 and DDA for females, as well as in mean intensity for males. Mean intensity consistently distinguished RV from TV, with significantly higher values in RV. Compared to the /n/ sound, the /m/ sound presented with lower value perturbation measures and F0SD and higher value for CPP and HNR, though not significant. Formant analyses revealed significant F2 and F3 differences in males, while female results were less consistent. These findings demonstrate the potential of acoustic parameters to differentiate RV from TV. Consistent patterns across multiple measures, some statistically supported, highlight their promise as objective indicators and their utility in developing tangible feedback tools to enhance RVT practice
| Item Type: | Thesis (Masters) |
|---|---|
| Uncontrolled Keywords: | Resonant voice therapy |
| Subjects: | R Medicine R Medicine > RA Public aspects of medicine > RA440-440.87 Study and teaching. Research |
| Divisions: | Kampus Kesihatan (Health Campus) > Pusat Pengajian Sains Perubatan (School of Medical Sciences) > Thesis |
| Depositing User: | MUHAMMAD AKIF AIMAN AB SHUKOR |
| Date Deposited: | 01 Mar 2026 00:48 |
| Last Modified: | 09 Apr 2026 02:58 |
| URI: | http://eprints.usm.my/id/eprint/63679 |
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