You might find this interesting, then. A company that does remote technical interviews as a service tried altering the pitches of interview candidates' voices through software, so they could change whether they sounded male or female, and looked at the effect it had on how the interviewers judged their performance.

http://blog.interviewing.io/we-built-voice-modulation-to-mas...

"After running the experiment, we ended up with some rather surprising results. Contrary to what we expected (and probably contrary to what you expected as well!), masking gender had no effect on interview performance with respect to any of the scoring criteria (would advance to next round, technical ability, problem solving ability). If anything, we started to notice some trends in the opposite direction of what we expected: for technical ability, it appeared that men who were modulated to sound like women did a bit better than unmodulated men and that women who were modulated to sound like men did a bit worse than unmodulated women. Though these trends weren’t statistically significant, I am mentioning them because they were unexpected..."