For searching art history databases, you'll want to use the terms that art historians use for describing sound installations, such as these from Bibliography of the History of Art (BHA), International Bibliography of Art (IBA), and ARTbibliographies Modern (ABM):
"Installation art"
"Installation works"
"sound art"
"Sound sculpture"
Combining these, you might come up with a search like this:
("installation art" OR "installation works") AND ("sound art" OR "sound sculpture")
Use the limiting options in the left margin to narrow your list of results.
Additional terms you'll find in Art & Architecture Complete:
"SOUND installations (Art)"
"SOUND in art"
You can also find sound installations in the Journal of Artistic Research (JAR). Relevant projects are tagged with the phrase "sound art;" you can view them by clicking on that term in the word cloud on the JAR home page.
Once you've identified an installation you want to research, you might want to search for the artist in our ProQuest Dissertations and Theses Global database. The dissertations themselves aren't considered scholarly, but they may cite references that could be helpful.
Note that this database is a subset of Academic Video Online (AVON), a database Brandeis subscribes to.