"So we have to be very mindful of that and sometimes just bite the bullet and just conduct ourselves in, I guess, a better manner at times. Sometimes your emotions can get the better of you out on the field. We're playing a game [where] everyone is trying to do their best and sometimes that happens," he added.
The incident took place during the Sheffield Shield clash between New South Wales and Western Australia on November 13.
Pacer James Pattinson also faced a one-match suspension by Cricket Australia for violating its Code of Conduct on Sunday. He was found guilty of breaching Article 2.1.3 of CA's Code of Conduct for personal abuse of a player while fielding during Victoria's Sheffield Shield match against Queensland.
Smith also said that he felt he should apologise for what he has done.
"We're Australian players regardless of where we're playing and what we're doing. We sign up to values and in our contracts we've got a code of conduct there we have to play by. I got pinged and so be it. I felt I should apologise for that," Smith said.