Sometimes your vehicle sounds louder than usual. If this is the case, look for an exhaust leak. These leaks often start out small but grow larger and louder over time. An easy way to check for the source of an exhaust leak is to simply place a rag or some sort of restriction on the tail pipe while the engine is running. This will force the exhaust to leak out more in the area where the leak is, making it easier to find. Here's a video demonstrating the process.