Background: Teachers rely heavily on their voices, making them susceptible to voice disorders affecting their teaching efficacy and well-being. This study explores the role of voice as a working tool for teachers and its impact on their professional lives, a necessary step in designing intervention points. Methods: Using a phenomenological approach, we conducted qualitative interviews with 18 teachers (13 females, 5 males) from diverse backgrounds. They represented diverse teaching areas, grade levels, and school districts. Data were analyzed through content analysis. In this process, 52 codes were identified, totaling 753 code references. Findings: This study uncovered insights into the role of voice as a working tool for teachers and its impact on their professional lives. In-depth analysis of the interviews with 18 teachers resulted in 6 key themes: (1) Voice is a crucial occupational tool for teachers for instruction, engagement, and classroom management; (2) working conditions significantly impact teachers' vocal health, with environmental factors and vocal load contributing to voice problems; (3) vocal health concerns are frequently reported by teachers, emphasizing the need for comprehensive health management strategies; (4) there are notable best practices and gaps in vocal care, with teachers expressing the need for more resources and formal training; (5) amplification devices play a significant role in sustaining teachers' vocal health, although access to and use of these tools is inconsistent; and (6) voice-related problems have a significant emotional and psychosocial impact on teachers, affecting their self-perception, professional identity, and well-being. Discussion: This study highlights the critical role of vocal health in teachers' professional lives, revealing its impact on teaching efficacy, well-being, and professional identity. The findings highlight the need for comprehensive support systems, including vocal health programs, resources like amplification devices, and counseling for emotional impacts. The six identified themes emphasize the necessity of holistic interventions to enhance teachers' well-being and effectiveness.