Have you pushed the mic volume up in Control Panel > Sound mic settings ?
(or Settings > System > Sound > Sound Control Panel)
i.e. - R\click on the Speakers or Headset Playback option, then click on Properties. Then click on the Levels tab in the next Window.
Many (most ?) uni-directional mics are like this, and it's intentional.
In addition to picking up most of the sound from straight in front of the mic, having to 'close' mic helps
keep background noise from getting into the mix.
You may have noticed how vocalist in live acts get up close and personal with the mic. This is why.
.