If the zombies were attracted to noise, how come the Jerusalem zombies weren't distracted by the helicopters? In fact, the Israelis should have discovered the noise attraction factor earlier if they had been using choppers all along to cope with the catastrophe.
It is well known that mechanical noise is much less attractive to Zombies than animal sounds especially those emanating from humans. If you compare revving a V-8 engine without mufflers to the sound of a female's voice your average Zombie will ignore the engine and go for the lady. It only stands to reason, women taste better. Also Zombies don't care about any stink a girl might have.
This is why I had advised the Israelis prior to the catastrophe that a massive pit be dug outside the wall approaching the size of the Grand Canyon. At the bottom of the pit have a cage full of Palestinian women with bullhorns ululating. Every Zombie and his brother would have jumped into the abyss never to escape. They declined my suggestion mostly due to political correctness. https://www.youtube.com/watch?v=Md7OvU5JIcI
He killed sixteen Czechoslovakians. Guy was an interior decorator.