LSVT-LOUD compatible biofeedback plus intonation training for your patients with Parkinson's disease.
up to 80%
of people with Parkinson's disease develop speech disorders
+6 dB
average vocal gain targeted with the LSVT-LOUD protocol
< 15%
of people with Parkinson's disease receive active speech therapy
Parkinson's disease leads to hypokinetic dysarthria: a voice that is too soft (hypophonia), too monotone (loss of F0 variation), with reduced articulation and sometimes a festinating rate. Patients cannot perceive on their own that their voice has become inaudible. That is the heart of the therapeutic challenge.
ICD-10: G20Hypophonia: soft voice, constant effort to be heard
Monotone voice: loss of melodic variation (flat F0)
Festinating rate: uncontrolled acceleration mid-utterance
Reduced articulation: imprecise consonants, low amplitude
Monitoring deficit: the patient believes they are speaking normally
A real-time intensity gauge, calibrated to the patient's conversational voice. The target (x1.3 to x2) matches the +30% to +100% goal of LSVT-LOUD. The patient sees immediately whether they reach the projection zone.
Real-time visualization of the melodic contour via NSDF autocorrelation. 11 prosodic and emotional intentions. Voice coaching segment by segment. Ideal for countering monotone speech, a symptom that is often under-treated.
PA-TA-KA, oral-facial praxis, tongue twisters. Optional combined articulation plus intensity work for patients who are both dysarthric and hypophonic. 20 dedicated exercises.
Intensity progress curve over several weeks, session history, replayable recordings. See the gains between two appointments.
5 to 10 min/day between sessions. The biofeedback replaces the therapist's ear for daily exercises. Key to maintaining LSVT gains at 6 and 12 months.
Assign projection or intonation exercises directly to your patient. Review their adherence and results from your dashboard.
These modules run right in your browser, microphone optional. This is what your patients see between sessions.
Read this sentence aloud:
"Hello, my name is Marie and I've lived in Lyon for twenty years."
Keep your level in the green zone for 10 seconds.
Phrase to practice
"Hello, how are you doing today?"
Neutral
Parkinsonian voice
After training
Real-time visualization of the pitch contour (F0) · NSDF autocorrelation
A preview of the modules available in the app. Every exercise can be assigned from your dashboard.
The patient sees live whether their voice carries far enough. Without you in the room, they know exactly when to push and when to ease off.
The melodic curve displays in real time. Your patient finally understands why people tell them they speak in a monotone.
Your patient measures their own articulation cadence and compares it to the previous session. Progress becomes visible.
The amplitude of articulatory movements is guided visually. Your patient independently corrects what they could not perceive.
5 to 10 minutes a day at home, with the same feedback as if you were present. Your LSVT gains take hold between sessions.
At a glance, you see whether your patient has progressed since the last appointment, before they even tell you.
1. Calibration
The patient reads a neutral sentence for 5 seconds. The app measures their resting conversational voice.
2. Projection exercise
They read a text following the gauge. The green zone = LSVT goal reached.
3. Intonation
They practice melodic contours across 11 intentions. Their F0 curve displays in real time.
4. Assessment
Session result: % of time in the projection zone, average intensity, progress curve over time.
5. Follow-up
You review the history from your dashboard. You adjust the goals at each session.
The patient speaks, the analysis engine pre-fills the measures, you keep control of every value — and the Word report is ready at the end.
Voice & speech · MPT, GRBAS, diadochokinesis
Clinical orientation aids, to be validated in consultation. The app does not establish any diagnosis.
LSVT-LOUD produces an average gain of +6 dB, maintained at 6 and 12 months with daily practice.
Ramig et al. (2001), Movement Disorders
Meta-analysis of behavioral speech treatments in PD: intensive approaches targeting vocal intensity (LSVT-type) yield the strongest evidence.
Atkinson-Clement, Sadat, Pinto (2015), Neurodegenerative Disease Management
Parkinsonian dysarthria has three components, dysphonia, dysprosody (F0 monotony) and dysarthria, which progress gradually over the course of the disease.
Pinto, Ghio, Teston, Viallet (2010), Revue Neurologique
Early speech therapy intervention is decisive. Too many patients are referred late, even though speech therapy is effective from the first vocal signs.
Gentil, Esnault, Danaila, Broussolle (2016), Pratique Neurologique
An honest look at what the main tools on the market offer for this indication.
| Tool | Voice biofeedback | SPS measurement (rate) | Browser-based | No installation | Remote tracking | Free for patients |
|---|---|---|---|---|---|---|
| Talk Slower | ||||||
| LSVT Coach | ||||||
| Voice Analyst | ||||||
| SPEAK OUT! |
= partial or limited feature. Sources: official tool websites, May 2026.
Your patients practice at home with the same biofeedback as in session. You see their progress before they even arrive.
These indications share a mechanism or a close differential diagnosis. Explore the dedicated tools.
Vocal projection, articulatory range, and at-home tracking for your patients with dysarthria.
See detailsRate control, vocal projection, and self-monitoring to support neurogenic palilalia at home, alongside your clinical work.
See details