Posts Tagged speech intelligibility

Does LSVT LOUD improve Speech Intelligibility? 

On March 5, 2026   /   LSVT LOUD Blogs, Main Blog, Featured  

Duffy (2013) defines speech intelligibility as the “degree of accuracy with which a listener recovers the acoustic signal or message produced by a speaker.” Kent (1992) considers intelligibility as the paramount issue in speech pathology, “the behavioral standard of communication.”

Speech intelligibility can be severely reduced in Parkinson’s disease (PD); it can be among the main concerns of people with PD (Miller et al., 2007). The validity and reliability in assessing speech intelligibility in PD may be affected by several factors.

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Report on the Impact of LSVT LOUD in Improving Communication of a Preschool Child and a Young Adult with Cerebral Palsy / Rapport clinique de l’impact du protocole LSVT LOUD pour améliorer la communication d’un enfant d’âge préscolaire et d’un jeune adulte ayant une paralysie cérébrale

On July 17, 2023   /   Pediatrics, Main Blog  

This clinical report presents real-world clinical data on the use of LSVT LOUD to improve the communication of one preschooler and one young adult with cerebral palsy (CP). Treatment resulted in significant improvements in vocal loudness, communicative effectiveness, participation, and speech (for both clients) and velopharyngeal function (for the young adult) / Notre article clinique rapporte des données cliniques « réelles » relatives à l’utilisation du protocole LSVT LOUD pour améliorer la communication d’une enfant d’âge préscolaire et d’un jeune adulte ayant une paralysie cérébrale. L’intervention offerte a permis d’améliorer de façon significative l’intensité vocale, l’efficacité de la communication, la participation communicative et la parole (chez les deux patient(e)s), ainsi que la fonction vélopharyngée (chez le jeune adulte).

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Crowdsourced Perceptual Ratings of Voice Quality in People With Parkinson’s Disease Before and After Intensive Voice and Articulation Therapies: Secondary Outcome of a Randomized Controlled Trial

On June 9, 2023   /   LSVT LOUD Blogs, Main Blog  

This study investigated whether untrained listeners who are recruited through online crowdsourcing platforms can assess voice treatment for people with Parkinson’s Disease (PD) in a way that agrees with reliable measurement tools. In crowdsourcing, researchers use digital platforms to connect with a large number of individuals who perform tasks online for monetary compensation.

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The Acoustic Voice Quality Index (AVQI) in People with Parkinson’s Disease Before and After Intensive Voice and Articulation Therapies: Secondary Outcome of a Randomized Controlled Trial

On April 22, 2022   /   Main Blog  

This study presents the first randomized controlled trial (RCT) examining the effects of two speech treatment approaches, LSVT LOUD and LSVT ARTIC, on voice quality in individuals with Parkinson’s disease (PD). Both treatments were identical in how intensive they were, but LSVT LOUD targeted healthy loudness, whereas LSVT ARTIC focused on articulation. Additionally, an untreated group of individuals with PD also participated in the study, and a group of 20 individuals without PD were included to examine differences in voice quality at pre-treatment.

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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

On April 11, 2022   /   Main Blog  

This study looked at speech and brain changes in individuals with Parkinson’s disease following two speech treatment approaches, matched for intensity of dosage (16, 1-hour individual sessions in one month) but differing on treatment target, loudness (LSVT LOUD) or articulation (LSVT ARTIC). A group of untreated individuals with Parkinson’s disease were also studied as a comparison group. All participants were evaluated at baseline, post-treatment (one month after baseline), and seven months after baseline to help identify both short-term and long-term changes.  

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Intensive Voice Treatment (LSVT LOUD) for Children With Down Syndrome: Phase I Outcomes

On March 21, 2022   /   Pediatrics, Main Blog  

Based on this initial study, we have enough proof to continue to establish higher levels of treatment evidence that LSVT LOUD has a positive therapeutic effect on voice and speech in children with DS. We hope to conduct a larger treatment study and include a wider age-range of children and youth with DS.

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Making Intensive Voice Treatment (LSVT LOUD®) Accessible for a Child with Autism Spectrum Disorder

On October 6, 2021   /   Pediatrics, Main Blog  

One key takeaway is that pre-treatment protocols can be designed and implemented to give children who are otherwise deemed unable to participate in LSVT LOUD a chance to train and prepare for the gold-standard protocol which may open the door to functional communication and the chance to have some control of their speech.

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New Research! Improving communication in background noise for people with Parkinson’s.

On July 26, 2021   /   Main Blog  

Results showed that speech intelligibility of words in the presence of both noise conditions improved in participants with Parkinson’s who had LSVT LOUD compared to the groups that had LSVT ARTIC or no treatment. The ability to be understood can improve the quality of life for people with PD and this is really what the goal of any therapy should be, so it is exciting to be able to report these results.

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The effects of intensive speech treatment on intelligibility in Parkinson’s disease: A randomised controlled trial

On August 20, 2020   /   Main Blog  

Combined with improvements to acoustic measures and communicative efficiency reported in previous studies, our findings suggest that SLPs’ patients with PD will experience improvements in speech communication and quality of life if treatment targeting voice is included in their patients’ care plan.

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