Several suggestions depending on the answers to those questions ...

Have you talked to your neighbor about it? Maybe they can come up with a solution (I know I wouldn't want my doggie to be sad all day home alone).

I also found this (lots of other results on Google, too):
http://blog.adoptapet.com/help-your-dog-stop-crying-when-left-alone/

peanut butter in a kong toy might keep it interested and not barking

... maybe some natural doggie downers (I can't recall the name, but there's an herbal available from Drs Foster and Smith online).

My Cattle Dog Hank was a terror when he was young - would escape from his crate and tear shit UP ... until I started taking him out for 10-15 minutes of frisbee in the morning. Then I'd give him his Kong with 'Trail Mix' (broken up dog treats into bite size pieces) mixed with a squished up banana (Peanut Butter is fattening) and he was pretty chill for most of the day - no more dug up plants, unrolled TP, chewed pillows etc etc ...

Hounds are sociable and don't do well when left alone.

Dogs and kids are social animals.

Dogs will be happy to sleep whenever there is "down time," and unlike little kids you can leave them home alone when you go to work. But there must be "up time" every day to make up for that.

Our three dogs are asleep right now. My wife is at work, this is my "work time" too even if I'm posting on DU as "real" work problems simmer in the back of my mind. But our dogs know they will get several hours of quality "pack" time every day, and they also get to sleep on the beds. I've got two dogs sleeping on beds at the moment, the old dog nearest me is snoring and Big Dog is taking up the entire sofa, not chained, not sleeping in the dirt at night in bad weather, his kind of heaven. And he is confident there will be great adventure this afternoon, lots of new things to smell, many new places for "pee mail." (Trees don't complain. Free fertilizer! Circle of Nature...)

We are allowed three dogs in our city without a special permit. My wife tends to bring home the least adoptable hard cases, older or neglected animals. Our most recent adoption was kept chained in a backyard day and night because his previous owners couldn't "control" him. Two of our current dogs ended up in the shelter because their owners thought of them more as fashion accessories than living, thinking beings.

"I'd look good with that dog!" is not a reason to have a dog. That goes as well for the man who wants to look tough with the dog with a spiked collar as it does for the woman with the purse dog. You can't keep dogs in the closet.

All the dogs in our current pack were awful when we brought them home, but once they "get" our home routine they radiate joy.

My brother and his wife "adopted" one of their neighbor's dog into the family pack. The neighbor is struggling to keep his small farm by working for someone else. He simply didn't have enough time for his dog. The dog started hanging out at my brother's house and was accepted into the pack. The dog still loves his owner, but when his owner isn't there for him he's not bored and crying.

Talking to a neighbor is always good.

I own two border collies and they need lots of "up time". This time of year it's too hot in North Texas to run them during the middle of the day, so I take them out in the mornings and evenings to play fetch. The male fetches the ball and the female tries to herd him. It's a riot to watch. A few minutes of this every day and I never have a bit of trouble from them. If I suspend their activities for a few days the female starts chewing everything in site and the male barks spontaneously and becomes way too hyper.

or actually mine was like his ......where I live everyone has dogs so the howling and barking have become a way for them to communicate when us "humans" barely acknowledge each other's presence anymore .

it is crazy! Spring and fall - when the weather is nice - all the dogs start barking and howling to each other. I know when a package comes to our door because the neighbor dog usually starts barking as soon as she notices the mailman.

It's hilarious - once one dog starts howling - the whole neighborhood has something to say. Our dogs have a lot to say as well - they are pretty big gossips.

Although, I think hounds by their very nature are pretty vocal (correct me if I am wrong, anyone). When I lived alone with my lab puppy, I had no idea that he would bark the whole time I was gone, until I got a complaint from the landlord. I was mortified.

My husband (who was then my boyfriend) would bring his dog over to keep mine company during the day and that seemed to help. We both had separation anxiety (I hated being away from my baby - I probably made his anxiety worse). Tiring them out is always good - a tired dog is a well-behaved dog.

The dog needs a sedative and then get it to an animal psychologist ASAP.