kiscrazy

I have a 2003 GT with automatic transmission. Sometimes after I come to a stop and then accelerate, for about 2-3 seconds my car makes a sound (kind of like a cruise ship horn). As soon as I get going the sound goes away. It doesn't do it all the time just every now and then. I can't tell if it is coming from the brakes or if it is actually something under the hood.....any thoughts!

Thanks!