Any zombie fan knows that they are attracted to sound. Many don't know the reason behind it, however. The main reason is to give writers of books, cartoons, television shows, and movies an edge to build their scenes upon. As the zombie is headed toward the noise, there are ample opportunities for rugpulling. They can encounter other zombies or a host of other intertuptions.
There is another reason as well. It is said that in the zombie world, zombies are attracted to food. When something or someone makes a noise, their primal brain instincts kick in. That means...fight or flight to animals and humans but to zombies, it spells dinner. As the suspence builds, the sound gets louder and the zombie becomes more determined to gravitate toward the noise. There are obstacles but if you are the person making the noise, there sure aren't enough of them.