How to Soundproof Thin Apartment Walls for Cheap | ApartmentSearch January 19, 2021 | No Comments Knock knock! Whoâs there? BANG! Oh, itâs just your loud upstairs neighbor hanging a paintingâagain! Learn how to reclaim the quiet in your apartment. Source: blog.apartmentsearch.com Tags: Financial Wize, FinancialWize, How To