From time to time people find and mention to us places on the Net where you can hear recordings of Tolkien's work. Now Salon.com has a bit of one that's a personal favourite of mine: Tolkien reading his own work. Robert B has kindly forwarded a Net source for this:

"There is a "Top 20 Spoken Word Recordings" on Salon.com. Tolkien reading from LOTR is #14. There is also a link through that link of him reading an Elven poem in Elvish."