I've been looking into the benefits of white/ambient noise on studying lately, and I think it's best to put on some cafe, busy library, study place ambient noise (with people talking in the background). I've been looking for audio tracks of this kind. So far I've found some that are simply "sound effects", which last < 1 minute. But what I really want is an audio track that plays for several hours with no looping.
I've searched (on YouTube, Soundcloud, Google, and Bing) for terms like "ambient noise", "ambient chatter", "background chatter", "background murmur", "background conversation noise", "study ambience", "ambient conversation", and the like. But most samples are < 1 minute and some of the longer samples either are NOT conversations or are cleverly disguised loops. But I haven't found anything like that.
Is there a web app that has a collection of ambient background noise that I described?