Stormboard doesn't do any voice collaboration because every company has their own favorite way to do conference calling (phone, Skype, Webex, Zoom, etc.)
You can use Stormboard easily with any of those solutions but rather than share your screen, just have everyone log into their Stormboard so they can be active participants rather than just watching someone present.
Stormboard does have a built in chat, comments on ideas (where you can @ tag users you need notified), and integrations with both Slack and Teams to allow for text-based communications within your Storms.