[LunarBerry]

Originally Posted by Alexa_And_Oscar

Sorry it's taken me so long to do this! I've found that when it's just him and I, he barks more. I have put it down to him being nervous, maybe because I am a Girl, so he is more protective? He does bark when my Partner is with me, but nowhere near as much as when we are alone. Maybe the house does sound different when it is just the two of us. Thank you so much for all the advice. I've just learnt to roll with the punches

You might not be far fetched in the over protective idea. He might be feeling like he needs to watch out for you two more because the rest of your "pack" is away or he might be feeling more anxious for the same reason and don't feel as secure. Or most likely both. He probably does notice those sounds, perhaps not as prominently, when everyone else is around, but when the pack is together there's more a secure feeling and probably takes cues from the majority.
My Kimchi used to not bark at things, but started to doing it because her older sissies do it.