Different personalities, different voices
My Ingrid was jet black with green eyes. For almost 18 years she was amazingly talkative. Not so much in a constant sense--not annoying--but in the variety of sounds she made, and the range of situations in which she'd make them. Her timing and the range of her inflections were so expressive that it was plain she had a firm grasp of exactly what her relationship was to different people. Everybody used to crack up to listen to our conversations. Ingrid asked questions, she ventured guesses, she made comments, she reacted to all kinds of different situations with funny little noises, she pleaded, she declared herself in absolute terms, she issued ultimata, she sniped, she cheered, she enthused, she mused aloud, she cried, she talked in her sleep, she muttered, she quipped, she said she was bored, she announced it when she was disgusted, she cursed, she made a grand entrance after everybody had settled in, she made it plain when she thought you were wasting her time, she flirted and cooed, she sang, and sometimes she talked to herself. Plus she purred, of course.
My new friend Matilda purrs like crazy when she's happy, and I know she can speak because she cried when I carried her out to my car from the place where I adopted her, but since she came home all she's had to say has been a tiny little squeak at her mirror image. She looks up at me and mouths "meow," but she's not even whispering.
Mr. Pickles went "Bdddddrp?"
A friend of mine had a cat named Pickles who always went "Bdddddrp?" as he raised his head to be petted. Came up on his hind legs. Sort of a purring call. He was a gray Siamese with blue eyes. Very mellow guy.
Matilda just squeaks. Rarely. She can cry if she's in trouble (sort of weaky), but otherwise it's just a tiny squeak. To indicate excitement, mainly.
She can definitely hear okay. Maybe she's just shy? When she's in a good mood lying beside me, I'll say hello & she just goes through the motions. No sound, though.