I use https://www.amazon.com/Sony-MDRXB50AP-Extra-Earbud-Headset/dp/B00JRD13T8 and I'm not gonna lie i don' really have a problem with knowing where shots come from that goes for this game and tarkov
All keys can be found in desks, safes and jackets..a lot of times you'll find jackets hanging on chairs.
Also check out map genie interactive map app it's super helpful. https://play.google.com/store/apps/details?id=io.mapgenie.thecyclefrontiermap