in Thoreau’s Journal:
I frequently hear a dog bark at some distance in the night….The commonest and cheapest sounds, as the barking of a dog, produce the same effect on fresh and healthy ears that the rarest music does. It depends on your appetite for sound. Just as a crust is sweeter to a healthy appetite than confectionery to a pampered or diseased one. It is better that these cheap sounds be music to us than that we have the rarest ears for music in any other sense. I have lain awake a night many a time to think of the barking of a dog which I had heard long before, bathing my being again in those waves of sound, as a frequenter of the opera might lie awake remembering the music he had heard.