One of our cats goes into "poor, unloved kitty" mode sometimes. It's a long mrrrroooowww that makes you think he's feeling all of the sadness in the world.

It's like, "Dude, we're upstairs. Come up and cuddle with us." (We work from home, and our offices are upstairs.)

We also used to have a female gray tabby that was a sound engineer. She'd find the places in the house that would echo her meows the loudest and let loose there. The house is so quiet since she passed, and we have other cats and a dog. On conference calls, it was much more likely you'd hear her than the dog or the other cats. (The dog has a louder bark, but he rarely uses it.)