Technical Sound article

I found this article very informative and find it fascinating that sound is so essential in film. Obviously I knew that sound played a part, but I had no idea how in depth it went. Although there was a lot of information, I am interested more so to see the practical aspect and the practice of using sound. I think it will be interesting to see how film and sound line up together. I always wondered how they can sync up so well and this article has given me a wider understanding of that.