Clear and amplified speech strategies for hypophonia management

Thea Knowles, PhD, CCC-SLP, Maura Philippone, M.A., CCC-SLP, ​Chloe Glabach, Rachel Chomas, Alice Silbergleit, PhD, CCC-SLP, Ramya Konnai, PhD, CCC-SLP, Helen Mach, PhD, CCC-SLP, & Qiben Yang

Presented at the 2026 Fall Voice Conference

Denver, CO, September 2026

References

[1] Atalar, M. S., Oguz, O., & Genc, G. (2023). Hypokinetic dysarthria in Parkinson's disease: A narrative review. The Medical Bulletin of Sisli Etfal Hospital, 57(2), 163-170. https://doi.org/10.14744/SEMB.2023.29560.

[2] Ma, A., Lau, K. K., & Thyagarajan, D. (2020). Voice changes in Parkinson's disease: What are they telling us? Journal of Clinical Neuroscience, 72, 1-7. https://doi.org/10.1016/j.jocn.2019.12.029.

[3] Fox, C., Ebersbach, G., Ramig, L., & Sapir, S. (2012). LSVT LOUD and LSVT BIG: Behavioral treatment programs for speech and body movement in Parkinson disease. Parkinson's Disease, 2012, 391946. https://doi.org/10.1155/2012/391946.

[4] Behrman, A., Cody, J., Elandary, S., Flom, P., & Chitnis, S. (2020). The effect of SPEAK OUT! and The LOUD Crowd on dysarthria due to Parkinson's disease. American Journal of Speech-Language Pathology, 29(3), 1448-1465. https://doi.org/10.1044/2020_AJSLP-19-00024.

[5] Behrman, A., Cody, J., Chitnis, S., & Elandary, S. (2022). Dysarthria treatment for Parkinson's disease: One-year follow-up of SPEAK OUT!® with the LOUD Crowd®. Logopedics Phoniatrics Vocology, 47(4), 271-278. https://doi.org/10.1080/14015439.2021.1958001.

[6] Narayana, S., Franklin, C., Peterson, E., Hunter, E. J., Robin, D. A., Halpern, A., Spielman, J., Fox, P. T., & Ramig, L. O. (2022). Immediate and long-term effects of speech treatment targets and intensive dosage on Parkinson's disease dysphonia and the speech motor network: Randomized controlled trial. Human Brain Mapping, 43(7), 2328-2347. https://doi.org/10.1002/hbm.25790.

[7] Lam, J., & Tjaden, K. (2013). Acoustic-perceptual relationships in variants of clear speech. Folia Phoniatrica et Logopaedica, 65(3), 148–153. https://doi.org/10.1159/000355560 .

[8] Stipancic, K. L., van Brenk, F., Kain, A., Wilding, G., & Tjaden, K. (2022). Clear speech variants: An investigation of intelligibility and speaker effort in speakers with Parkinson's disease. American Journal of Speech-Language Pathology, 31(6), 2789–2805. https://doi.org/10.1044/2022_AJSLP-22-00189

[9] Yorkston, K., Baylor, C., & Britton, D. (2017). Speech versus speaking: The experiences of people with Parkinson's disease and implications for intervention. American Journal of Speech-Language Pathology, 26(2S), 561-568. https://doi.org/10.1044/2017_AJSLP-16-0087.

[10] Körner Gustafsson, J., & Schalling, E. (2025). It is no solution to sit and keep quiet: Experiences of communicative function in people with Parkinson's disease following participation in a group intervention for speech and communication. American Journal of Speech-Language Pathology, 34(4S), 2440-2451. https://doi.org/10.1044/2024_AJSLP-24-00222.

[11] Kwan, L. C., & Whitehill, T. L. (2011). Perception of speech by individuals with Parkinson's disease: A review. Parkinson's Disease, 2011, 389767. https://doi.org/10.4061/2011/389767.

[12] Knowles, T., Adams, S. G., Page, A., Cushnie-Sparrow, D., & Jog, M. (2020). A comparison of speech amplification and personal communication devices for hypophonia. Journal of Speech, Language, and Hearing Research, 63(8), 2695-2712. https://doi.org/10.1044/2020_JSLHR-20-00085.

[13] Page, A. D., Schroeder, J.-R., Knowles, T., Jog, M., & Adams, S. G. (2023). A comparison of voice amplifiers and personal communication systems for hypophonia: An exploration of communicative participation. American Journal of Speech-Language Pathology, 32(4S), 1850-1865. https://doi.org/10.1044/2023_AJSLP-22-00161 .

Next
Next

Comparing Speech Features Across Clear and Amplified Conditions in Parkinson’s Disease