If the link is successful,
you can hear a radio interview/soundbite under two minutes
with the announcer who changed genders.

Introducing Kristen Eck

To this I can only add one punctilious detail.
During a one-on-one interview,
Kristen Eck, the announcer, speaks low, as in conversation.

But the way most of us hear the announcer,
Kristen is up in a helicopter with a headpiece/microphone,
and the speaking voice is raised,
not only in volume, but in pitch.
The difference is one of quality.
The announcements broadcasted demonstrate a higher voice, slightly anyhow.
This is audible at the very very beginning of the soundbite.