More than a thousand web search engines exist. None searches the entire web. Some do not track your searches; others plant trees!
Specialty Search Engines:
More Search Engine Options:
Created by Suffolk County Community College Library.
Using a search engine's Advanced Search makes you searches more precise, saving you time. (To compare the number of results after doing a Google Advanced Search, for instance, click "Tools.") It reduces but not eliminate how your personal browsing habits influence your search results.
Note that the last Google's Advanced Search choice, usage rights, is not particularly accurate. You'll still to check usage rights set by the images' original creators.
To find sounds to add to your presentation, try: