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A study on clinical effectiveness of acoustic energy visualization in rehabilitation of voice disorders

A study on clinical effectiveness of acoustic energy visualization in rehabilitation of voice disorders

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The study included 22 patients with voice disorders caused by functional factors who were eligible for voice therapy (mean age 59.0 years, SD 12.5; 6 males and 16 females).

Twenty-two patients with voice disorders were randomly assigned to either a device group using a visual feedback device for straw wall vibrations during phonation (n = 11; mean age 59.6 years, SD 9.8; 2 males and 9 females) or a non-device group (n = 11; mean age 58.5 years, SD 15.2; 4 males and 7 females). Both groups performed 10 minutes of tube phonation training. Pre- and post-training changes and differences between the two groups were statistically analyzed using acoustic analysis indices as the primary outcome measures and vocal function test indices and questionnaire evaluations as secondary outcome measures.

No adverse events were observed in this study.

Primary outcome: Regarding acoustic analysis indices (Jitter, Shimmer, NHR), median values decreased in both groups after training; however, a statistically significant decrease was observed only in the device group. Secondary outcomes: Regarding vocal function test indices (sound pressure levels), only the device group showed a significant decrease (improvement) after training. This suggests that while immediate vocal improvement is possible with conventional tube phonation training without a feedback device, greater improvement can be obtained using a visual feedback device. Additionally, although there were no significant differences between the two groups in questionnaire scores regarding understanding of training content and motivation, positive responses regarding visual feedback were obtained from the device group.

The immediate effects of tube phonation training using the Smart Tube, a device that visualizes vibrations via LED, were investigated in 22 patients with voice disorders. After 10 minutes of training, only the device group showed significant improvement in acoustic analysis and sound pressure levels compared with the control group. Positive questionnaire feedback was obtained. These findings suggest that this visual feedback device facilitates rapid skill acquisition and improves vocal function in patients.

Mar. 04, 2026

No

https://jrct.mhlw.go.jp/latest-detail/jRCT1050230089

Kawamura Naoko

Himeji Dokkyo University

7-2-1 Kamiohno, Himeji, Hyogo

kawamura@gm.himeji-du.ac.jp

Kawamura Naoko

Himeji Dokkyo University

7-2-1 Kamiohno, Himeji, Hyogo

+81-772239020

kawamura@gm.himeji-du.ac.jp

Complete

Aug. 22, 2023

Interventional

randomized controlled trial

open(masking not used)

active control

parallel assignment

treatment purpose

Patients with voice disorders visiting the Department of Otorhinolaryngology, Kobe City Medical Center General Hospital, who will undergo tube phonation training.

Patients with hearing impairment
Patients with motor/sensory disorders

Voice disorders

In this study, the vocalization training support systems developed in the previous study will be introduced into the rehabilitation of voice disorders. In addition to the usual tube phonation training, tube phonation training using the proposed system will be conducted and its clinical effectiveness will be verified.

Acoustic analysis

Acoustic analysis, Vocal function, voice quality, user evaluation questionnaire

+81-78-302-5176

May. 08, 2023

+81-77-223-2211

May. 08, 2023

none