I was just curious about western/ barrelracing bridles. The one I use on my mare doesn't have a noseband- it has the bit and browband. Do western bridles have nosebands? I know English bridles do but was just curious about the western bridles
Western headstalls do not have a "noseband". (Bridle is the term used for the headstall and bit, together.)
You will sometime see a western bridle used in conjunction with a tie down, such as with roping where the horse requires the tie down to brace against when roping a steer or calf. They are two separate pieces of equipment.
Western bridles do however come with a simple one-ear or double-ear design, and some may or not not have a throat latch. It's a matter of personal preference and sometimes, a matter of fashion. I myself prefer a browband and throatlatch because I feel its less likely to slide off the horse's head when I am doing intense things (barrels, cattle work, etc).
And also, there are hackamores or combination western bits (bit with a noseband) that can make it look like the western headstall has a noseband, but it is actually the bit, and not the headstall.