So far he's been a quiet but very responsive little baby. He seems to actively observe and study people & the surrounding sounds. May be too early to tell yet, but he seems to be soothed when I softely whistle different birding calls especially the repetitive "po-tat-o chip, po-tat-o chip" call of the American Goldfinch and the "Oh Sweet Canada Canada Canada" call of the White Throated Sparrow. I'm hoping he'll equally enjoy these real bird sounds in a nature when he grows up a bit.
Welcome to our beautiful world, son!