I use Sennheiser headphones (don't remember the model and it doesn't seem to be on them; I bought these 3-5 years ago). My rMacbook Pro 2015 sits on my desk un

I use Sennheiser headphones (don't remember the model and it doesn't seem to be on them; I bought these 3-5 years ago). My rMacbook Pro 2015 sits on my desk under a monitor, right side toward me, with the lid closed. Because I've never really had a problem with people hearing me clearly (as long as the connection was okay), I haven't bothered to buy a mic. This is true even when the laptop's fans are racing due to, say, Docker for Mac struggling, as it does.