Not all feedback is explicit. Being able to see when you're confusing the audience helps a lot. Beyond that it depends on situation. Talk at a large conference

Not all feedback is explicit. Being able to see when you're confusing the audience helps a lot. Beyond that it depends on situation. Talk at a large conference is obviously one-way. Private talk to a "room" of 10 people who work with you on similar problems can be very interactive. The best ones are a low-fi 15min talk followed by a 45min discussion. Those 45min discussions are pure gold for a future large conference talk.