{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=voice+acoustics",
    "query": {
      "intervention": "voice acoustics"
    },
    "page_size": 10
  },
  "pagination": {
    "page": 1,
    "page_size": 10,
    "total_count": 20,
    "total_pages": 2,
    "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=voice+acoustics&page=2&page_size=10",
    "previous_page_url": null
  },
  "source": "remote",
  "last_synced_at": "2026-09-28T11:30:49.385Z",
  "attribution": "Data derived from public ClinicalTrials.gov records. The official record at https://clinicaltrials.gov/ remains the source of truth for current availability, contacts, and full study details.",
  "notes": [
    "This endpoint exposes only public summary fields — no participant contact emails, phone numbers, or scraped investigator contact details.",
    "For contact information and full protocol detail, follow each trial's `official_url` to the ClinicalTrials.gov record.",
    "This API is a navigational aid. It does not provide medical advice, eligibility determinations, or compensation guarantees."
  ],
  "trials": [
    {
      "nct_id": "NCT03101826",
      "title": "Optimizing the Social Engagement System in Prader-Willi Syndrome: Insights From the Polyvagal Theory",
      "overall_status": "TERMINATED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Prader-Willi Syndrome"
      ],
      "interventions": [
        {
          "name": "Listening Project Protocol",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL"
      ],
      "sponsor": "Indiana University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "13 Years",
        "maximum_age": "25 Years",
        "sex": "ALL",
        "summary": "13 Years to 25 Years"
      },
      "enrollment_count": 5,
      "start_date": "2017-11-01",
      "completion_date": "2023-03-08",
      "has_results": false,
      "last_update_posted_date": "2023-04-03",
      "last_synced_at": "2026-09-28T11:30:49.385Z",
      "location_count": 1,
      "location_summary": "Brewster, Massachusetts",
      "locations": [
        {
          "city": "Brewster",
          "state": "Massachusetts"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03101826"
    },
    {
      "nct_id": "NCT02217111",
      "title": "Prospective Study of Voice Therapy in Children: A Pilot Study",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Vocal Fold Nodules"
      ],
      "interventions": [
        {
          "name": "Adventures in Voice: Pediatric Voice Therapy",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL"
      ],
      "sponsor": "University of Pittsburgh",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "4 Years",
        "maximum_age": "11 Years",
        "sex": "ALL",
        "summary": "4 Years to 11 Years"
      },
      "enrollment_count": 12,
      "start_date": "2015-01",
      "completion_date": "2015-05",
      "has_results": false,
      "last_update_posted_date": "2016-01-25",
      "last_synced_at": "2026-09-28T11:30:49.385Z",
      "location_count": 2,
      "location_summary": "Pittsburgh, Pennsylvania",
      "locations": [
        {
          "city": "Pittsburgh",
          "state": "Pennsylvania"
        },
        {
          "city": "Pittsburgh",
          "state": "Pennsylvania"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02217111"
    },
    {
      "nct_id": "NCT04854031",
      "title": "Stream Segregation and Speech Recognition in Noise in Individuals With Cochlear Implants",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Cochlear Implants"
      ],
      "interventions": [
        {
          "name": "Cochlear Implants",
          "type": "DEVICE"
        }
      ],
      "intervention_types": [
        "DEVICE"
      ],
      "sponsor": "Father Flanagan's Boys' Home",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "19 Years",
        "maximum_age": "80 Years",
        "sex": "ALL",
        "summary": "19 Years to 80 Years"
      },
      "enrollment_count": 8,
      "start_date": "2021-08-02",
      "completion_date": "2022-03-31",
      "has_results": true,
      "last_update_posted_date": "2023-05-18",
      "last_synced_at": "2026-09-28T11:30:49.385Z",
      "location_count": 1,
      "location_summary": "Omaha, Nebraska",
      "locations": [
        {
          "city": "Omaha",
          "state": "Nebraska"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04854031"
    },
    {
      "nct_id": "NCT00406952",
      "title": "Study for Evaluating Different Methods of Measuring Depression Treatment Response",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Depressive Disorder, Major"
      ],
      "interventions": [
        {
          "name": "electronic diary",
          "type": "PROCEDURE"
        },
        {
          "name": "Sertraline",
          "type": "DRUG"
        },
        {
          "name": "Placebo",
          "type": "DRUG"
        },
        {
          "name": "voice acoustics",
          "type": "PROCEDURE"
        }
      ],
      "intervention_types": [
        "PROCEDURE",
        "DRUG"
      ],
      "sponsor": "Pfizer",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "65 Years",
        "sex": "ALL",
        "summary": "18 Years to 65 Years"
      },
      "enrollment_count": 165,
      "start_date": "2006-11",
      "completion_date": "2007-08",
      "has_results": false,
      "last_update_posted_date": "2008-08-21",
      "last_synced_at": "2026-09-28T11:30:49.385Z",
      "location_count": 12,
      "location_summary": "Norwich, Connecticut • Aventura, Florida • Jacksonville, Florida + 7 more",
      "locations": [
        {
          "city": "Norwich",
          "state": "Connecticut"
        },
        {
          "city": "Aventura",
          "state": "Florida"
        },
        {
          "city": "Jacksonville",
          "state": "Florida"
        },
        {
          "city": "Miami",
          "state": "Florida"
        },
        {
          "city": "Miami",
          "state": "Florida"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00406952"
    },
    {
      "nct_id": "NCT07017595",
      "title": "Gender-affirming Voice Training With Visual Feedback",
      "overall_status": "TERMINATED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Transgender Women",
        "Voice Alteration"
      ],
      "interventions": [
        {
          "name": "Visual-acoustic biofeedback: experimental",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL"
      ],
      "sponsor": "University of Cincinnati",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "MALE",
        "summary": "18 Years and older · Male only"
      },
      "enrollment_count": 6,
      "start_date": "2025-06-05",
      "completion_date": "2025-07-18",
      "has_results": false,
      "last_update_posted_date": "2025-07-24",
      "last_synced_at": "2026-09-28T11:30:49.385Z",
      "location_count": 1,
      "location_summary": "Cincinnati, Ohio",
      "locations": [
        {
          "city": "Cincinnati",
          "state": "Ohio"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT07017595"
    },
    {
      "nct_id": "NCT00831935",
      "title": "Use of Conversation and Acoustic Signals in Measuring Depression Severity",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Depression"
      ],
      "interventions": [],
      "intervention_types": [],
      "sponsor": "Boston Medical Center",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 89,
      "start_date": "2009-01",
      "completion_date": "2011-06",
      "has_results": false,
      "last_update_posted_date": "2013-04-08",
      "last_synced_at": "2026-09-28T11:30:49.385Z",
      "location_count": 2,
      "location_summary": "Boston, Massachusetts",
      "locations": [
        {
          "city": "Boston",
          "state": "Massachusetts"
        },
        {
          "city": "Boston",
          "state": "Massachusetts"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00831935"
    },
    {
      "nct_id": "NCT05625191",
      "title": "Patients With and Without Phonotrauma",
      "overall_status": "RECRUITING",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Phonotrauma"
      ],
      "interventions": [
        {
          "name": "Acoustic voice analysis",
          "type": "DIAGNOSTIC_TEST"
        },
        {
          "name": "High-speed videoendoscopy",
          "type": "DIAGNOSTIC_TEST"
        }
      ],
      "intervention_types": [
        "DIAGNOSTIC_TEST"
      ],
      "sponsor": "University of Texas Southwestern Medical Center",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "65 Years",
        "sex": "ALL",
        "summary": "18 Years to 65 Years"
      },
      "enrollment_count": 100,
      "start_date": "2023-01-17",
      "completion_date": "2026-12-31",
      "has_results": false,
      "last_update_posted_date": "2026-06-11",
      "last_synced_at": "2026-09-28T11:30:49.385Z",
      "location_count": 1,
      "location_summary": "Dallas, Texas",
      "locations": [
        {
          "city": "Dallas",
          "state": "Texas"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05625191"
    },
    {
      "nct_id": "NCT04273672",
      "title": "Speech, Linguistic and Acoustic Markers in Parkinson's Disease",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Parkinson Disease",
        "Cognitive Impairment, Mild",
        "Speech"
      ],
      "interventions": [
        {
          "name": "Cognitive Battery",
          "type": "DIAGNOSTIC_TEST"
        },
        {
          "name": "Voice, Speech and Language Analysis",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Questionnaires and Clinical Assessments",
          "type": "BEHAVIORAL"
        },
        {
          "name": "DNA Analysis",
          "type": "GENETIC"
        }
      ],
      "intervention_types": [
        "DIAGNOSTIC_TEST",
        "BEHAVIORAL",
        "GENETIC"
      ],
      "sponsor": "University of Massachusetts, Worcester",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 58,
      "start_date": "2020-01-13",
      "completion_date": "2025-02-28",
      "has_results": true,
      "last_update_posted_date": "2025-06-10",
      "last_synced_at": "2026-09-28T11:30:49.385Z",
      "location_count": 1,
      "location_summary": "Worcester, Massachusetts",
      "locations": [
        {
          "city": "Worcester",
          "state": "Massachusetts"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04273672"
    },
    {
      "nct_id": "NCT01435837",
      "title": "Interaction of Caffeine and Hydration on Voice",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "EARLY_PHASE1"
      ],
      "conditions": [
        "Voice Disorders"
      ],
      "interventions": [
        {
          "name": "C2 (200mg of caffeine; 1/2 L of water)",
          "type": "DRUG"
        },
        {
          "name": "C3(200mg of caffeine; 1 L of water)",
          "type": "DRUG"
        },
        {
          "name": "C1 (200mg of caffeine, no water)",
          "type": "DRUG"
        },
        {
          "name": "Placebo (no caffeine, no water).",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Southern Illinois University Carbondale",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "35 Years",
        "sex": "ALL",
        "summary": "18 Years to 35 Years"
      },
      "enrollment_count": 80,
      "start_date": "2010-10",
      "completion_date": "2013-05",
      "has_results": false,
      "last_update_posted_date": "2013-06-11",
      "last_synced_at": "2026-09-28T11:30:49.385Z",
      "location_count": 1,
      "location_summary": "Carbondale, Illinois",
      "locations": [
        {
          "city": "Carbondale",
          "state": "Illinois"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01435837"
    },
    {
      "nct_id": "NCT06441136",
      "title": "Characterizing the Impact of Presbyphonia on Social Interaction",
      "overall_status": "RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Presbyphonia"
      ],
      "interventions": [
        {
          "name": "PhoRTE Program",
          "type": "OTHER"
        },
        {
          "name": "University of California Los Angeles (UCLA) Loneliness Scale",
          "type": "OTHER"
        },
        {
          "name": "Social Disconnectedness Scale",
          "type": "OTHER"
        },
        {
          "name": "Patient Health Questionnaire 9",
          "type": "OTHER"
        },
        {
          "name": "Aging Voice Index",
          "type": "OTHER"
        },
        {
          "name": "The Edmonton Frail Scale",
          "type": "OTHER"
        },
        {
          "name": "Vocal Effort Scale",
          "type": "OTHER"
        },
        {
          "name": "Montreal Cognitive Assessment",
          "type": "OTHER"
        },
        {
          "name": "Voice Handicap Index-10",
          "type": "OTHER"
        },
        {
          "name": "Voice Problem Impact Scales",
          "type": "OTHER"
        },
        {
          "name": "Cough Severity Index",
          "type": "OTHER"
        },
        {
          "name": "Laryngoscopy",
          "type": "PROCEDURE"
        },
        {
          "name": "Acoustic, perceptual, and aerodynamic assessments",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER",
        "PROCEDURE"
      ],
      "sponsor": "Matthew R. Hoffman",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "65 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "65 Years and older"
      },
      "enrollment_count": 25,
      "start_date": "2025-01-10",
      "completion_date": "2026-08-31",
      "has_results": false,
      "last_update_posted_date": "2025-07-17",
      "last_synced_at": "2026-09-28T11:30:49.385Z",
      "location_count": 1,
      "location_summary": "Iowa City, Iowa",
      "locations": [
        {
          "city": "Iowa City",
          "state": "Iowa"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT06441136"
    }
  ]
}