{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?condition=Voice+Change&page=2",
    "query": {
      "condition": "Voice Change",
      "page": 2
    },
    "page_size": 10
  },
  "pagination": {
    "page": 2,
    "page_size": 10,
    "total_count": 10,
    "total_pages": 1,
    "next_page_url": null,
    "previous_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?condition=Voice+Change&page=1&page_size=10"
  },
  "source": "remote",
  "last_synced_at": "2026-07-23T01:22:10.039Z",
  "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": "NCT00015795",
      "title": "Study of Air Stream in Voice Production",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1"
      ],
      "conditions": [
        "Spastic Dysphonia",
        "Healthy"
      ],
      "interventions": [
        {
          "name": "airway interruption test",
          "type": "DEVICE"
        }
      ],
      "intervention_types": [
        "DEVICE"
      ],
      "sponsor": "National Institute of Neurological Disorders and Stroke (NINDS)",
      "sponsor_class": "NIH",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": null,
        "maximum_age": null,
        "sex": "ALL",
        "summary": "Not listed"
      },
      "enrollment_count": 30,
      "start_date": "2001-05",
      "completion_date": "2003-06",
      "has_results": false,
      "last_update_posted_date": "2008-03-04",
      "last_synced_at": "2026-07-23T01:22:10.039Z",
      "location_count": 1,
      "location_summary": "Bethesda, Maryland",
      "locations": [
        {
          "city": "Bethesda",
          "state": "Maryland"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00015795"
    },
    {
      "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": "2026-07-23T01:22:10.039Z",
      "location_count": 1,
      "location_summary": "Cincinnati, Ohio",
      "locations": [
        {
          "city": "Cincinnati",
          "state": "Ohio"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT07017595"
    },
    {
      "nct_id": "NCT01419444",
      "title": "Telemedicine Versus Traditional Treatment of Muscle Tension Dysphonia",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1",
        "PHASE2"
      ],
      "conditions": [
        "Muscle Tension Dysphonia"
      ],
      "interventions": [
        {
          "name": "Airflow Exercises for Voicing",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL"
      ],
      "sponsor": "University of Arkansas",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "21 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "21 Years and older"
      },
      "enrollment_count": 14,
      "start_date": "2011-08",
      "completion_date": "2013-08",
      "has_results": false,
      "last_update_posted_date": "2013-12-18",
      "last_synced_at": "2026-07-23T01:22:10.039Z",
      "location_count": 1,
      "location_summary": "Little Rock, Arkansas",
      "locations": [
        {
          "city": "Little Rock",
          "state": "Arkansas"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01419444"
    },
    {
      "nct_id": "NCT05506085",
      "title": "Deep Brain Stimulation for Laryngeal Dystonia: From Mechanism to Optimal Application",
      "overall_status": "RECRUITING",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Laryngeal Dystonia",
        "Adductor Spastic Dysphonia of Dystonia"
      ],
      "interventions": [
        {
          "name": "Deep Brain Stimulation",
          "type": "DEVICE"
        }
      ],
      "intervention_types": [
        "DEVICE"
      ],
      "sponsor": "Indiana University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "70 Years",
        "sex": "ALL",
        "summary": "18 Years to 70 Years"
      },
      "enrollment_count": 12,
      "start_date": "2022-10-01",
      "completion_date": "2030-08-01",
      "has_results": false,
      "last_update_posted_date": "2025-07-17",
      "last_synced_at": "2026-07-23T01:22:10.039Z",
      "location_count": 1,
      "location_summary": "Indianapolis, Indiana",
      "locations": [
        {
          "city": "Indianapolis",
          "state": "Indiana"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05506085"
    },
    {
      "nct_id": "NCT04648891",
      "title": "Spasmodic Dysphonia Pain",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2",
        "PHASE3"
      ],
      "conditions": [
        "Spasmodic Dysphonia"
      ],
      "interventions": [
        {
          "name": "Lidocaine",
          "type": "DRUG"
        },
        {
          "name": "Vibrating wand",
          "type": "DEVICE"
        }
      ],
      "intervention_types": [
        "DRUG",
        "DEVICE"
      ],
      "sponsor": "Mayo Clinic",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 32,
      "start_date": "2021-08-01",
      "completion_date": "2023-07-01",
      "has_results": true,
      "last_update_posted_date": "2024-05-23",
      "last_synced_at": "2026-07-23T01:22:10.039Z",
      "location_count": 1,
      "location_summary": "Phoenix, Arizona",
      "locations": [
        {
          "city": "Phoenix",
          "state": "Arizona"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04648891"
    },
    {
      "nct_id": "NCT00369265",
      "title": "Safety and Efficacy of Lansoprazole 30mg Twice Daily in Treatment of Laryngitis Associated With Gastroesophageal Reflux",
      "overall_status": "TERMINATED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE4"
      ],
      "conditions": [
        "Laryngopharyngeal Reflux"
      ],
      "interventions": [
        {
          "name": "Lansoprazole",
          "type": "DRUG"
        },
        {
          "name": "Sugar pill",
          "type": "DIETARY_SUPPLEMENT"
        }
      ],
      "intervention_types": [
        "DRUG",
        "DIETARY_SUPPLEMENT"
      ],
      "sponsor": "American Institute for Voice and Ear Research",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "89 Years",
        "sex": "ALL",
        "summary": "18 Years to 89 Years"
      },
      "enrollment_count": 18,
      "start_date": "2006-08",
      "completion_date": "2009-11",
      "has_results": true,
      "last_update_posted_date": "2012-08-24",
      "last_synced_at": "2026-07-23T01:22:10.039Z",
      "location_count": 3,
      "location_summary": "Detroit, Michigan • Philadelphia, Pennsylvania • Houston, Texas",
      "locations": [
        {
          "city": "Detroit",
          "state": "Michigan"
        },
        {
          "city": "Philadelphia",
          "state": "Pennsylvania"
        },
        {
          "city": "Houston",
          "state": "Texas"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00369265"
    },
    {
      "nct_id": "NCT03042975",
      "title": "Imaging Genetics of Laryngeal Dystonia",
      "overall_status": "RECRUITING",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Laryngeal Dystonia",
        "Unaffected Relatives of Laryngeal Dystonia Patients",
        "Voice Tremor",
        "Muscle Tension Dysphonia"
      ],
      "interventions": [
        {
          "name": "MRI",
          "type": "OTHER"
        },
        {
          "name": "Blood draw",
          "type": "PROCEDURE"
        }
      ],
      "intervention_types": [
        "OTHER",
        "PROCEDURE"
      ],
      "sponsor": "Kristina Simonyan",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": null,
        "maximum_age": null,
        "sex": "ALL",
        "summary": "Not listed"
      },
      "enrollment_count": 410,
      "start_date": "2017-01-23",
      "completion_date": "2028-07-31",
      "has_results": false,
      "last_update_posted_date": "2025-12-02",
      "last_synced_at": "2026-07-23T01:22:10.039Z",
      "location_count": 1,
      "location_summary": "Boston, Massachusetts",
      "locations": [
        {
          "city": "Boston",
          "state": "Massachusetts"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03042975"
    },
    {
      "nct_id": "NCT00001936",
      "title": "Electrical Muscle Stimulation to Aid Swallowing in Dysphagia",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Deglutition Disorder",
        "Healthy"
      ],
      "interventions": [],
      "intervention_types": [],
      "sponsor": "National Institute of Neurological Disorders and Stroke (NINDS)",
      "sponsor_class": "NIH",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": null,
        "maximum_age": "90 Years",
        "sex": "ALL",
        "summary": "Up to 90 Years"
      },
      "enrollment_count": 155,
      "start_date": "1999-09-28",
      "completion_date": null,
      "has_results": false,
      "last_update_posted_date": "2017-07-02",
      "last_synced_at": "2026-07-23T01:22:10.039Z",
      "location_count": 1,
      "location_summary": "Bethesda, Maryland",
      "locations": [
        {
          "city": "Bethesda",
          "state": "Maryland"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00001936"
    },
    {
      "nct_id": "NCT03349086",
      "title": "Effects of Vocal Exercises for Spasmodic Dysphonia",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Adductor Spasmodic Dysphonia"
      ],
      "interventions": [
        {
          "name": "Voice Exercise",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL"
      ],
      "sponsor": "University of Wisconsin, Madison",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "21 Years",
        "maximum_age": "70 Years",
        "sex": "FEMALE",
        "summary": "21 Years to 70 Years · Female only"
      },
      "enrollment_count": 15,
      "start_date": "2014-07-28",
      "completion_date": "2018-07-25",
      "has_results": false,
      "last_update_posted_date": "2019-05-23",
      "last_synced_at": "2026-07-23T01:22:10.039Z",
      "location_count": 1,
      "location_summary": "Madison, Wisconsin",
      "locations": [
        {
          "city": "Madison",
          "state": "Wisconsin"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03349086"
    },
    {
      "nct_id": "NCT06152627",
      "title": "Voice Therapy Per the Rehabilitation Treatment Specification System",
      "overall_status": "RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Muscle Tension Dysphonia"
      ],
      "interventions": [
        {
          "name": "Standard of care voice therapy with novice clinician RTSS-Voice documentation",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Standard of care voice therapy with expert clinician RTSS-Voice documentation",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL"
      ],
      "sponsor": "Massachusetts General Hospital",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "14 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "14 Years and older"
      },
      "enrollment_count": 600,
      "start_date": "2026-02-03",
      "completion_date": "2027-06-29",
      "has_results": false,
      "last_update_posted_date": "2026-05-26",
      "last_synced_at": "2026-07-23T01:22:10.039Z",
      "location_count": 5,
      "location_summary": "Atlanta, Georgia • Boston, Massachusetts • New York, New York + 2 more",
      "locations": [
        {
          "city": "Atlanta",
          "state": "Georgia"
        },
        {
          "city": "Boston",
          "state": "Massachusetts"
        },
        {
          "city": "New York",
          "state": "New York"
        },
        {
          "city": "Salt Lake City",
          "state": "Utah"
        },
        {
          "city": "Madison",
          "state": "Wisconsin"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT06152627"
    }
  ]
}