“Reducing noise in the academic library: The effectiveness of installing noise meters” ($) in the paywalled Library Hi Tech. The paper…
“explore[s] the effect of an electronic [light-up] noise-monitoring device (NoiseSign) at reducing noise levels in quiet study areas in an academic library.”
Perhaps their NoiseSign could also trigger a powerful signal-blocker that would block all phone connections within 50 feet for thirty minutes. The resulting peer-pressure on talkative teens could be enormous.
A post-print is available on the institutional repository for this article: http://digitool.Library.McGill.CA:80/R/-?func=dbin-jump-full&object_id=137524&silo_library=GEN01
Many thanks. JURN indexes http://digitool.library.mcgill.ca/ – where the PDF is – so the article should be findable via JURN fairly soon.