Car louder than normal

I have a 2008 Honda civic manual and my friends have been telling me it sounds louder than normal. Now that I pay attention to it, it is a bit louder when going faster. I'm planning on taking it to a mechanic in the weekend but does anyone know what's up?

You have a hole in your exhaust

Change the oil and check for an exhaust leak.

Start it up and with it idling, walk around it and see if you can hear any exhaust leaks.

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