Hearing and the Ear table of contents duration Introduction Welcome2m 35s Science of Hearing How Does the Ear Work?6m 44s Why Do We Need Two Ears?1m 39s Hearing Loss and Hearing Aids The Hearing Video17m 2s Hearing Test: How Old is Your Hearing?2m 55s How Does a Hearing Aid Work?2m 55s Projects Make an Eardrum Model [Beginner]0m 36s Make Your Own Custom-Fit Earbuds [Intermediate]4m 27s Creature Connection Bats: Echolocation3m 9s Technology at Work Boy Hears Father’s Voice for the First Time3m 35s Listening to Music Through Vibration2m 33s Conclusion How Does an Earbud Reveal God’s Glory?6m 27s