singing instructors. At the start of the work, Lehmann expresses her purpose in writing: to clarify the complex sensations involved in singing and to dissect the physiological processes that govern them. She reflects on the evolution of singing education, lamenting the industrialization of singing instruction which prioritizes speed over mastery. Lehmann emphasizes the importance of thorough practice and deep understanding of vocal technique, sharing insights from her rich career in singing and teaching to guide her readers toward producing beautiful and powerful voices. This opening section sets the tone for her comprehensive exploration of various aspects of singing that follow. (This is an automatically generated summary.)