Teams just sucks. But yes, isolating other participants from your own voice (ie using a dedicated microphone and wearing headphones) will help a lot. That way,

Teams just sucks. But yes, isolating other participants from your own voice (ie using a dedicated microphone and wearing headphones) will help a lot. That way, it won't have to try to do noise cancelation. Also, it will sound a lot better if they are two separate devices (vs one Bluetooth headset with an integrated mic) because of the protocols involved. Bluetooth full duplex has really low bit rates and sounds like crap. A wired headset doesn't have that issue, nor would separating out the headphones from the mic into two devices (like USB mic and Bluetooth headphones). Just make sure to configure the software to actually use the separate mic as its input. An external DAC is almost certainly a waste of money for this use case. The built in one is fine.