This innovative work highlights interdisciplinary research on phonetics and phonology across multiple languages, building on the extensive body of work of Katarzyna Dziubalska-Kołaczyk on the study of sound structure and speech. // The book features concise contributions from both established and up-and-coming scholars who have worked with Katarzyna Dziubalska-Kołaczyk across a range of disciplinary fields toward broadening the scope of how sound structure and speech are studied and how phonological and phonetic research is conducted. Contributions bridge the gap between such fields as phonological theory, acoustic and articulatory phonetics, and morphology, but also includes perspectives from such areas as historical linguistics, which demonstrate the relevance of other linguistic areas of inquiry to empirical investigations in sound structure and speech. The volume also showcases the rich variety of methodologies employed in existing research, including corpus-based, diachronic, experimental, acoustic and online approaches and showcases them at work, drawing from data from languages beyond the Anglocentric focus in existing research. // The collection reflects on Katarzyna Dziubalska-Kołaczyk’s pioneering contributions to widening the study of sound structure and speech and reinforces the value of interdisciplinary perspectives in taking the field further, making this key reading for students and scholars in phonetics, phonology, sociolinguistics, psycholinguistics, and speech and language processing.