To send commands (hotkeys) to Blender with your voice, you can use Voice Macro (a freeware for Windows): https://www.voicemacro.net/
And if you don’t have a microphone (or a headset with a microphone), you can use your smartphone as a microphone. To make the “bridge” between your smartphone and your computer, you can use https://wolicheng.com/womic/ (free).