anyone use an "intercom" type device to hear the outside during winter, chicken monitoring

We have windows open much as possible.. Of course its winter here and cant hear chickens w/o opening windows....
Id like to be able to hear whats going on outside...egg song, Roo crowing, possible screeching if something bothers them, etc presently we have couple wired thermomers going to the outside out the wall thin wire of course
they are far enough away from house to not hear... but
I was thinking to use an "intercom" type devices...I want it wired only I will not use unnecessary any wireless stuff in the house....Everthing we own just about is wired.I even thew out cordless phones. Corded only devices for me...
kind of like having a speaker outside but reversed. We did have a Radio shack unit that I bought years ago to communicate with the topper of truck to the cab. Just wish someone could tell me what box to look into.......of all the still packed boxes of our move...bc
anyone do that? suggestions on brand and model numbers of units.... thanks yall

 

You guessed it cordless phones etc are as bad as cell phones.... I have a dsl outlet prob in most every room.. even in my former home. Hubby is retired and did all of that and more for a living...so
I have been listening to health radio show for YEARS mostly internet radio units....eah with the "cord"
the unit can be close to the window awning,,,, outside so any certain brands ec Yall ???