Showing posts with label Hearing. Show all posts
Showing posts with label Hearing. Show all posts

Friday, April 24, 2009

Understanding Your Dog's Hearing

Different types of scissors - sewing (left), p...Image via Wikipedia

Understanding Your Dog's Hearing

Dogs hear a lot better than people do, partly because their ears are incredibly mobile. They have 15 different muscles that can move the ears in all directions. This helps them detect and understand sounds no matter where they're coming from. Head cocking is a tool they use to hear clearly. Dogs shouldn't be doing it all the time, however. When they are, they may need some extra help to hear. Speak in a higher voice.

One way dogs decide what's worth listening to and what isn't call for help is by the sound frequency. High-pitched sounds get their attention, probably because they resemble the sounds made by traditional prey such as rabbits and chipmunks. Pitching your voice upward will get your dog's attention and let him know that he needs to listen carefully to what you're about to say. Stand where he can see you. Even though a substantial portion of a dog's brain is devoted to sound, a dog always uses his other senses to augment what he's hearing. Standing in front of your dog will allow him to watch your face, eyes, posture, and body movements while you talk. Even if your dog isn't hearing clearly, he'll be able to gather a lot of information from your body language about what you're trying to tell him.

Trim the ears. Dogs with unusually hairy ears may hear a little better if you remove some of the fluff. You can use blunt-ended scissors to trim some hair from the outer part of the ear flaps, but groomers usually prefer plucking. However, dogs don't enjoy having their ears
plucked and will often put up a fight, so you may want to pay a groomer to do it for you.

Dogs may cock their heads to the sides often. Even though it's normal for dogs to cock their heads in order to hear (and see) better, they shouldn't be doing it too often. A dog whose head seems to be in perpetual tilt mode probably has an ear problem that isn't going to get better on its own. A damaged eardrum or an inner ear infection can make it hard for dogs to hear. In some cases, ear problems can throw off a dog's internal sense of balance, which will also cause him to tilt his head. Any time a dog carries his head tilted for more than a few minutes, he needs to visit his veterinarian.

Lastly, dogs with ear infections often shake their heads as well as tilt them. Use a flashlight to light the inside of your dog's ear. If you see redness or a discharge, or if you smell an unpleasant odor, he probably has an infection and is going to need antibiotics to knock it out.
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Thursday, April 23, 2009

Why Dogs Cock Their Heads To The Side

Author: Jose Valentino (myself). This photogra...Image via Wikipedia

Why Dogs Cock Their Heads To The Side

It wasn't by accident that advertising for the company “RCA” once featured a dog cocking his head in front of a speaker horn. There's something about this position that most people find utterly adorable. Dogs know it, too, which is why they do it, even when they aren't trying to hear anything in particular. We give them a positive response, and they remember that. Also, dogs tilt their heads for very practical reasons as well. Tilting the head to the side puts one of the ears up and forward. By turning an ear in the direction of fuzzy or inaudible sounds, dogs are able to hear a little more clearly.

We often forget how confusing human speech is for dogs. Even though dogs understand some of what we're saying, most of our conversation is just a blur of sound to them. Usually, they just ignore it. They can tell from our body language and eye movements when we're saying things that concern them. Once something attracts their interest, they'll often perk up their ears and tilt their heads slightly in order to figure out what's going on.

Dogs rarely cock their heads when sounds are coming from the sides, since their ears are
already in prime hearing position. They mainly do it when people are in front of them, since the sound waves aren't traveling directly toward the ears. You'll see this more in puppies than older dogs. It's not that puppies have more trouble hearing. They just haven't been around us long enough to figure out what's important and what isn't. So they respond to almost any sound with a little head-cock, especially when we're looking at them at the same time. They know something interesting is happening, and they don't want to miss a thing. They often cock their heads to make sense out of the babble of noise. The movement allows them to capture every bit of sound.

The way a dog's ears are designed may play some role in how much he cocks his head.
Pricked-up ears may be slightly more efficient than other ear shapes, since sound waves are able to go right in. Floppy ears present a problem. The sound waves have to pass through a big, heavy ear flap before reaching the eardrum. This probably doesn't make a big difference, but dogs with heavy, hanging ears may have to work a little harder in order to hear what's being said. The inside of a dog's ear is shaped like a cup. This design allows the ears to scoop in sound waves - but only when the opening is unencumbered.
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