Music therapy device shows promise for PTSD in small pilot study
NCT ID NCT04999852
First seen Jun 26, 2026 · Last updated Jun 26, 2026
Summary
This pilot study tested the Safe and Sound Protocol (SSP), a device that plays filtered music through an app to stimulate the vagus nerve, in 45 therapy clients with PTSD and anxiety. Participants used the SSP alongside their regular therapy and completed questionnaires about their symptoms before, during, and after the intervention. The goal was to see if the SSP could help reduce PTSD and anxiety symptoms, and to prepare for a larger, more rigorous trial.
What this could mean
Our plain-language read of the trial. This is informational only, not medical advice or a prediction.
- Active substance
- Safe and Sound Protocol (SSP) - a non-invasive device that plays filtered music through an app to stimulate the vagus nerve
- What this could lead to
- If it works, this could point toward a simple, drug-free way to help people with PTSD and anxiety feel calmer and more regulated.
- What could go wrong
- This is a very small pilot study with only 45 people, no randomization, and no control group for the SSP. Results may not apply to everyone, and the device is not yet proven effective.
This is an AI summary of the original study and may miss details. Read our disclaimer.
Study facts
What this study's own registry entry says, in plain language.
- Phase
-
Not a phased trial
Phase numbers describe drug development. The registry uses this when they do not apply, as it does for trials of devices, procedures or behaviour changes, and for observational studies.
- Participants
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45 people
The number who actually took part.
- Started
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Jul 2021
- Finished
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Dec 2023
- Lead sponsor
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Other sponsor
The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.
Who can take part
This study's own entry requirements. Only the study team can say for certain whether you qualify.
- Ages
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18 years and older
- Sex
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Anyone
- Healthy volunteers
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Not accepted
This study is not open to healthy volunteers. The entry requirements below say who it is open to.
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Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.
SSP Intervention Arm: Inclusion Criteria: * Client at Spencer Psychology in Bloomington, Indiana * Diagnosed with PTSD or trauma not otherwise specified * Already have agreed with therapist to administer SSP as a part of therapy Exclusion Criteria: * Tinnitus or hearing loss * Diagnosed with cardiac arrhythmia * At high risk for 2019 novel coronavirus (COVID-19) complications based on Center for Disease Control (CDC) guidelines, unless vaccinated Comparison (Treatment As Usual) Arm Additional Criteria: Inclusion Criteria: 1. 18 years of age or older 2. Active psychotherapy client at Spencer Psychology 3. Diagnosis of PTSD or trauma not otherwise specified 4. Match range of PCL-5 baseline scores with treatment arm during screener survey Exclusion criteria: 1. Currently using or have previously used the Safe and Sound Protocol (SSP) in therapy 2. Current therapy includes Eye Movement Desensitization and Reprocessing (EMDR)
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Conditions
The condition(s) this trial relates to.
As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
Contacts and locations
Locations
-
Spencer Psychology
Bloomington, Indiana, 47403, United States
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