Pronunciation research is a field of study that focuses on how speech sounds are produced and perceived in languages. Researchers in this area investigate the specific sounds used in different languages, how they are articulated using the vocal tract, and how they are perceived by native speakers. This research often involves analyzing acoustic properties of speech sounds, studying the variations in pronunciation across different dialects, and developing tools and methods for teaching pronunciation to non-native speakers. Pronunciation research is important for understanding and improving communication in spoken language, both for language learners and for native speakers.