The is not a single, famous institution — it’s more a type of lovingly curated, small-scale preservation project. If you’ve come across a specific site or social media account by that name, it likely follows the model above. For actual access, a web search for “Teacup Audio Archive” + request access may lead you to their current home (often a private forum or hidden page on the Internet Archive).
: Animals, birdsong, and environmental recordings. Teacup Audio Archive