There's no way to achieve this without an adaptor. You have a two-plug headset & a one-plug audio port.
Additionally, anything you plug into that socket will cut out the internal speakers. Some desktop computers can software-bypass this, but on many laptops it's a hardware switch.
Practically, your only way to achieve this would probably be by using a USB headset & avoid that socket altogether.
From ASUS KB - Why the external microphone can not be used after plugged into the Notebook audio combo jack?
There are two kinds of Headphones/microphone connector in the market.
- Three-conductor 3.5 mm separate microphone and Headphone.
![enter image description here](https://cdn.statically.io/img/i.sstatic.net/Ncvlt.png)
- Four-conductor 3.5 mm headphone with microphone.
![enter image description here](https://cdn.statically.io/img/i.sstatic.net/DSlEL.jpg)
If you want to use the external headphone function, you can use both
devices.
But if you want to use the external microphone function,
the three-conductor 3.5 mm microphone will not work after plug into
the Notebook audio combo jack(
).
Suggest to use a four-conductor 3.5 mm headphone with
microphone device, the microphone and headphone function can be used
at the same time.