You're certainly not the only person who leaves a Television on for Background noise when working at home.
I work online and I live alone right now and I hate the silence when in my house so I turn on the Television while watching it or not.
The noise in the background helps me to concentrate more on my work because I'm not thinking about the silence that would be there if the Television were off.
A friend said I was running up my electric bill and wasting electricity by leaving the Television on while not watching it.
But my LED Television only uses around 54 watts so that equates to 12,960 KWH watts of electricity use per month and at my electric rate of 10 cents per KWH it comes to around $1.30 per month which is hardly any money at all.
Totally worth the $1.30 per month I spend to keep my Television on all day for 8 hours to be more productive and earn more money online.