Policeman Carrying Noise Complaint came to My Apartment, What’s the aftermath/effect to me?

Hi all, new mover here. I've received a noise complaint from two policemen ringing my apartment doorbell, and now I wanted to ask what to do next.

A bit of backstory, I just moved to Japan recently, about last month, and now live in Osaka City. Haven't had any problems so far, all my business with the shiyakusho went without a hitch, and my left and right neighbors seem nice.

So, tonight, the parts for my computer came. I was a bit excited and started opening boxes immediately after I got home from work at around 7 p.m. About 40-50 minutes later, two policemen came and told me there was a complaint about noises coming from my room, like loud footsteps, just today, and asked for my zairyuu card.

I instantly became aware of what I’d been doing and told them I was building a computer tonight, so that might be the reason. They laughed, I apologized and they told me to shizukani shitekudasai then left.

What's next then? they didn't tell me from where the complaint came from but probably from directly downstairs, should I apologize? Also would this effect my visa? I just started working as a mechanical engineer and my visa is 5 years long, would it maybe get reduced? or when it's time to extend my visa this would get mentioned? I'm a bit clueless sorry.

Thanks and sorry for my english.