How to manage sound devices in Windows 10

To install a new microphone, follow these steps:

1. Make sure your microphone is connected to your computer.
2. Select Start (Windows logo Start button) > Settings (Gear-shaped Settings icon) > System > Sound.
3. In Sound settings, go to Input > Choose your input device, and then select the microphone or recording device you want to use.  

To test a microphone that has already been installed:

1. Make sure your microphone is connected to your computer.
2. Select Start (Windows logo Start button) > Settings (Gear-shaped Settings icon) > System > Sound.
3. In Sound settings, go to Input > Test your microphone and look for the blue bar that rises and falls as you speak into your microphone. If the bar is moving, your microphone is working properly. 
4. If you aren't seeing the bar move, select Troubleshoot to fix your microphone.

To install a new output device (speakers, headphones), follow these steps: 

1. Make sure your device is connected to your computer.
2. Select Start (Windows logo Start button) > Settings (Gear-shaped Settings icon) > System > Sound.
3. In Sound settings, go to Choose your output device, and then select the speakers or headphones you want to use.

See more on https://support.microsoft.com/en-us/help/4520288 (Fix sound problems in Windows 10).