Never come across any mention of any, that's from my readings of the extant parts of his autobiography, Steinman book, Damon Knight and a few others.I don't think I've ever heard Fort's voice.... do any recordings exist of him speaking?
A resonant, thoughtful Mark Twain type voice would be great... though it's equally possible he had a voice like the late, great Gilbert Gottfried or even Truman Capote.I have mixed feelings about the possibility of hearing Fort's voice. If his voice is low-pitched, relaxed, friendly and authoritative, then great! If he is hesitant, high-pitched, and tense, then the Voice of Fort in my head is gone forever. I guess I prefer my illusions....