What i never understand...

You hit on the 2 things I thought about most while watching this movie.

The aliens make a racket themselves when they're following the choppers around, how do they not get distracted by their own sounds?

Yep, I kept on thinking that you'd probably get out of most problems if you just had a pocketful of stones/projectiles, especially in a city environment where literally throwing anywhere metres around you would create a loud enough noise.

Unfortunately the more I see these movies the more I realise they keep throwing up flaws and ways for these aliens to be tricked.

I figured that, like most creatures, they learn in time what sounds to go for and what to ignore. And that they know that many sounds often lead to what they're seeking (people / food?). Eg. a car engine or sound of the tyres means a person might be in it.

And yeah... that cat. Having that cat was a massive liability. Why it didn't hiss, meow or purr is so odd.

And also, I was also thinking about how the creatures themselves make all that racket! Smashing things, knocking stuff, breaking glass, etc.

I 100% agree. In fact, this is an issue I have with any "blind monster that hunts by sound" movie.

In real life, there are basically ZERO species of animals that are totally blind and hunt 100% by sound. Even bats have much better vision than you might think. There's that Netflix movie called The Silence that also has monsters that hunt by sound, but their hearing is so fucking sensitive (they can hear a single footstep in the woods from 100 yards away) that they simply couldn't exist.

Sorry, people say "well, they have selective hearing and have learned to filter out footsteps from the sounds of rain or wind" but no, that's impossible. Imfuckingpossible. That would be like if we could filter a rainstorm the sound of a fly farting from two houses down. Even if we were blind and used hearing to 100% navigate through life, it's simply impossible. It's basically telekenesis at that point.

Tremors is the only "blind monster that hunts by sound" movie I've seen that's believable because they hunt specifically by vibration, not sound. So technically they COULD learn the different between the vibrations of a footstep and the vibrations of branches rustling, AND the filmmakers thought about this and show the monsters learning the differences between the two vibrations.