Different workplaces have different rules. And yes, different setups.
The fact that you hear very little chatter would alarm me, as software engineering is a team activity. But then I remembered that at my workplace from five years ago, we didn't do a lot of talking either but the LAN-wide chat and the internal email traffic were fast and furious. We really reserved face to face talks and phone conversations to the small percentage of situations that had to be escalated (*).
To answer your question: the lack of chatter in your office doesn't mean a thing if they have alternative modes of communication and they are using them. I'll give you an analogy: the fact that you see a duck idly floating on the water doesn't mean that the duck's legs are not frantically paddling under the water's surface.
(*) Our office layout was open floor, so hearing somebody else's conversation easier than super easy, and it could be disruptive to your attempt to focus on the problem you are working on. In addition, more than a few people are like me in that their voice is loud and carries all the way to the floor exits. We quickly went to chat and email, not least because the Vice-P of Sales expressed discontent at standup meetings that both he and his prospects could not help but be startled and discomfited whenever they heard any of our senior technical staff, including myself, explode and yell "FUCK!" at the top of their lungs over something that had gone South as he was making his approach and sales pitch to the client. Chat and email fulfill my need to coordinate with the team without me driving them crazy with my voice - That was 2005-2012, which is antedeluvian in terms of currently available online team collaboration tools.