From TheVerge.com…..
Until recently, the default voice for Apple’s Siri assistant has been stereotypically female-sounding. However, studies have found that having AI assistants default to female-sounding voices can reinforce harmful stereotypes, so Apple has tried to fix that in its upcoming iOS 14.5, which is now in beta.
When you update your phone to iOS 14.5, you’ll be prompted to pick a default voice for Siri — and Apple is including two new voice options. However, if you’ve changed your mind and want to use a different voice (or are using the 14.5 beta and weren’t prompted), this guide will show you how to change the voice after setup.
It’s a reasonably simple process. First, go to the Settings app, then to Siri & Search, and tap Siri Voice. There, you’ll be presented with the list of options.