In the modern world, communication technologies have been integrated with the internet. SDSs (speech dialog
systems) use voice search technology to answer user’s queries with the information they request. Information normally is stored
in a large database, and a query needs to be matched with a field in the database. Research on acoustic modeling focuses on
improving robustness to environmental noise, channel conditions, and speaker variation, while research on pronunciation
addresses the issue of unseen word sounds and variability in pronunciation
