The National Institute on Deafness and Other Communication Disorders (NIDCD) invites applications for Clinical Research Center Grants (P50 Clinical Trial Optional) to advance the diagnosis, prevention, treatment, and amelioration of human sensory and communication disorders, specifically those related to hearing, balance, smell, taste, voice, speech, or language. This funding opportunity, PAR-25-445, supports integrated, multidisciplinary research programs comprising 3-4 synergistic research projects and an administrative core, with 1-2 optional scientific cores, all focused on a unifying clinical theme. Applications must primarily involve individuals with sensory and/or communication disorders or their data/tissues, though limited departures are possible with strong justification. Low-risk clinical trials are optional. Applicants are strongly encouraged to consult with NIDCD staff prior to submission, as non-responsive or incomplete applications will not be reviewed. The maximum project period is five years, with budgets for new applications capped at $1,500,000 direct costs per year. Eligible applicants include various organizations, but foreign organizations are not eligible. Review criteria emphasize overall impact, the cohesiveness and synergy of projects, and the multidisciplinary approach, along with standard considerations for human subjects, vertebrate animals, and budget justification.