Setting to hear what the mic hears?

I am wondering if Audacity could solve a problem for me. I am looking after my mother who has had a fall recently and using a wireless door bell system where she can get my attention, she presses a button and the chime bell device sounds off. But when i am on my PC i use headphones and cannot hear it.

So i am wanting to have an app that I am able to keep the mic on and what noise it hears i will hear too while using the computer so if door bell chime plays i can hear it. I have tried Audacity but it records my mic silently. Is there a setting within the program to be able to hear what the mic hears? if this is not possible does anyone know of app that could work this way?

Thanks
Daza

Have a look at the following pages:
http://homeautomationguru.com/add-your-doorbell-to-insteon/
http://homeautomationguru.com/text-message-when-doorbell-rings/

Another possibility could be to use a flashing doorbell (commonly used in households that have a deaf occupant).

Thanks guys for your replies and suggestions. I manage to solve my problem via https://www.tenforums.com/tutorials/102323-change-default-audio-playback-device-windows-10-a.html

I found how to retrieve the old windows sound settings window, why this is hidden i don’t know. I just ticked listen in the recording tab of the microphone device to do what i was trying to achieve.

That Automated home site looks interesting, especially receive txt when doorbell is pressed, this could be handy if i am out of the house and mum needs me, quicker for her than trying to send a text.

Thanks again.