Yes. They use their ears the same way dogs and cats do. They can also turn a single ear to a sound that interests them. They can display aggression, interest, and even indifference with their ears.
To hear and listen with.
Tamed horses have many behaviors. First of all they use body language. A horses ears sofly held and facing sideways represents a happy and relaxed horse. If the horses ears are up and facing forward it means that the hore is aleted about something: it doesn't spook the horse(not yet) If the horse's ears are flat againts their head this means they are seriously mad about something. If a horse's ears are facing backwars slightly it means that the horse is listening to something. Lastly, if the horse's ears are flicking back and forth veryy quickly asnd his head is heald high it means that the horse is worried, spooked, and scared. Horses neigh and call. This is like a request to find out where other horses are. Horses squeal, nicker, and whinny too. Horse will kick and bite.
Mostly it is their ears.
Sound is something that travels in waves and we hear with our ears.
If you are going to use the vehicle to tow or haul something then torque is more important that h.p. However if you are not going to tow then h.p. is more important.
When a horse puts both ears backward he is most likely upset or annoyed with something. This doesn't necessarily mean he will do anything bad, but use caution when approaching a horse with his ears back. He may try to kick or even bite if he feels threatened. If you are riding a horse with his ears back, try to calm him down by patting his neck. If just one ear is slanted back, he is probably trying to figure out your riding cues.
Horses have extremely mobile ears - they can move in almost any direction. Horses in the wild use their ears to help detect predators, and even though domestic horses don't need to do that, they still use their ears to tune into the environment around them, so generally, wherever their ears are pointed, that's what they're paying attention to - so if they're keeping an ear on you, that's a sign that they're paying attention to what you're doing! In addition, horses use their ears to express feelings. A happy, alert horse will have his ears pointed forward. An upset horse will have them about halfway back, and a frightened or angry horse will pin them back so they're almost flat against his head.
A horse who pins its ears back and clearly threatens or displays impatience is a ticking bomb. It is but a matter of time before the threat is carried through. It may be moments away, it may be years away, but it is coming. The trigger may be pretty much anything that upsets the pattern or slows it down. It is the nature of horses to use aggression to enforce their will if they feel it is necessary.
animals can have holes for ears or can use smell if they don't have ears
cowboys use them to rounf up cattle
Elephants use their large sound collecting ears to hear sound. Elephant's ears are very important to an elephant because they serve many purposes, much more than hearing.
I would not recommend it. Get something that is made for cleaning out ears, such as Chlorohexaderm, etc. Ears are very sensitive inside. Ask your Veterinarian what to use also.