In 1984, I was an ET1 stationed at a communications station in Hawaii.
I get called in one night to repair the Autosevocom system (secure voice with lots of channels) It's microphone had a narrow frequency band and it was designed with a male voice range in mind.
The operator is a cute female with a high squeaky voice and I Knew it would never work for her. I ran a few voice checks, no problem and then told her the problem was that she wasn't man enough to operate the equipment.
OMG
you would have thought I'd killed somebody. It went all the way up to the captain and at every step I tried to explain that the equipment would not operate for someone with a high voice. I had to take every sensitivity training program that was available on the island.