You’ll need to do this to truly understand his voice and his character in general. Make note of the subtleties and nuances in his voice. Note the type of words he uses, phrases he says often and how he relates to others. Who better to learn how to mimic Cartman’s voice, than from the voice actor himself? Replay his videos a lot. Observe how he holds his mouth, how his jaw is positioned, how his tongue stays flat when saying most words, etc. Cartman has a slight lisp and tends to jumble letters together. Instead of saying, “Cool!” and pronouncing all the letters in the word, Cartman says, “Ku!” He also tends to speak from behind his teeth. For example, when saying the word “tomorrow,” he pronounces it, “Tuh-muh-ruh.” He’s a loud talker and often sounds like he’s yelling at everyone, even during normal conversations. Remember, Cartman is still a kid who hasn't gone through puberty so his voice is really high. He also sounds super nasally which is a distinct sound. Notice as well that when he speaks it almost sounds like he has marbles in his mouth.  Practice by squeezing your nostrils closed to imitate the voice. Notice the squeakiness in his voice too. This is especially noticeable when he’s crying. The pitch is the noise created based on the rate of vibration of the vocal folds. The sound of the voice changes as the rate of vibrations varies. Meaning, if you want your voice to sound higher pitched like Cartman's, you will need to train your vocal cords to tighten and/or relax, depending on your natural sound. Computer software can be used to manipulate your voice as well. While Trey Parker does a great job on his own creating the iconic sound, his voice is further altered by technology to produce an even more extreme pitch.
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One-sentence summary -- Watch a lot of South Park episodes. Watch Trey Parker demonstrations. Understand his accent. Listen carefully to the voice. Hone in on the pitch.

Q: Use a light-colored pencil to outline a simple oval wherever you want to place your head. Angle the cheeks down towards the bottom of the head at a sharper angle to give the jawline some contour. Use multiple lines to get the shape you want for the jaw and head.  You’re going to draw over the top of the head, so don’t worry if it isn’t perfect. You can place the chin slightly to the left or right to make your character face in a specific direction. Slightly above the center of the head, in the center of the forehead draw two spikes pointing down and leaning away from one another. You can make them extend past the center of the head to make the hair hang over the character’s eyes, or you can keep them kind of smaller for a simpler hairstyle. Leave each spike open at the top to finish placing your bangs.  This should look like 2 connecting triangles that are missing the lines at the top. They can hang over the eyes or hang over the forehead. How sharp you make these lines will determine how spikey your hair looks. The straighter the lines, the sharper the hair. To draw the outline for the top and sides of the hair, draw a circle slightly larger than the outline of the head. Start in the bottom left of the cheek and draw a circle leading up around the top of the head. End your circle leading into the cheek on the opposite side. Make your lines slightly uneven to give the top of your hair a little natural variation.  You can turn this into simple longer hair by drawing lines running straight down from the sides of this semi-circle. Making the circle a little uneven will give the top of your hair some natural texture. You can make the circle perfectly smooth though if you’re trying to go for a cleaner look! Connect the exterior edges of the spikes in the middle with the interior edges of the circle where it meets the cheek. Use lines that arc slightly away from the center of the face to give your head some shape. Erase the original guide lines for the top of the head that are inside of the hair you’ve just completed.  If you want the hair to seem like it’s leading away from the center of the head, end these lines by leading right into the cheeks. This will make it seem like the hair is wrapping around the sides of the head. If you want the hair to seem bigger and spikier, extend the edges of the uneven circle so that they end right in front of the cheek line and connect the lines there. This will make it seem like the hair is poking out in front of the head. To give the hair some texture, layer some thinner, smaller spikes along the front of your hairline. Erase lines when you draw over them to make the hair seem like it has multiple layers. You can add a bunch of spikes for more detailed hair, or add 3-4 spikes for some simpler hair.  The curlier you make the spikes, the more natural the hair will look. This is mostly a matter of personal preference though, since manga hair is often pretty geometric and pointy. Adding 1-2 spikes arcing in a different direction than the rest of your hair is a great way to give your character a visual quirk! Add a tuft on the top of the head on the left or right side to give the top of the hair some detail. Pick a point for the tuft and draw 1 tiny line arcing away to the left, one tiny line arcing away to the right, and a third tiny line pointing up from the center. Erase any guidelines where sections of the hair overlap to finish your hair. Add color or outline the hair in black marker if you want to give the hair some definition. Most manga comics are in black and white. There’s nothing wrong with leaving your hair white.
A: Draw an oval in pencil to create an outline for the face. Add 2 big spikes falling down over the center of the face. Draw an uneven semi-circle around the back of the head leading into the cheeks. Connect the 2 spikes in the middle to the cheeks and erase the inside of the hair. Add smaller spikes falling over the face from the center to add detail. Include a tuft on the crown and erase guidelines to make hair overlap. Finished.

Article: Most home users buy machines that can accept documents as large as the standard 8-1/2" x 11" letter size (216 by 279 mm). Most laminating machines have an indicator light that will tell you when the machine is ready. These are 2 sheets of laminate plastic attached at one end.  If the pouch is only slightly larger than your document (for instance, if you are laminating a business card with business-card size pouch) you will need to carefully center the document so there will be an even border all around. If the document is significantly smaller than the pouch, it's not necessary to center the document because you can trim the edges. The sealed end of the pouch should be snug against the sealed end of the carrier. The carrier is 2 sheets of treated cardstock that protects the laminating machine from adhesive buildup. Insert the sealed end first until the machine grabs it. Don't force the carrier through the machine; it must go slowly enough for the machine to fuse the sheets.  Leave at least a 1/16" (2mm) border.
Question: What is a summary of what this article is about?
Choose a laminating machine that suits your needs. Turn on the machine and allow it to warm up. Place your document inside the laminating pouch. Place the laminating pouch containing the document inside the carrier. Feed the carrier through the machine. Allow the pouch to cool before removing it from the carrier. Trim the edges if needed using a paper cutter or scissors.