I beat you to it! I found NCH and downloaded their tone generator. So, I set it it at 110hz, and here is what I found:
110 hz is not a “very, very deep base” tone. I’d call it a baritone tone; I can easily hum it. I also was struck by how familiar the tone sounded; then, I realized where I’d heard it. It’s the first note George Harrison hits on his guitar in the beatles tune “I Feel Fine” (just to make sure, I played my .mp3 file of the song...yep, it’s the frequency of the first note of the song!)