Through careful analysis of sound in Walden with some attention to related works, this study demonstrates the three major facets of Thoreau's use of sound: first, an unusual aural sensitivity illustrated by his many varied sound images, which add concreteness and experiential immediacy; next, the depth of meaning that sound has as his metaphysical symbol in perception and expression of spiritual truth; finally, his effectiveness with such auditory devices as rhythm, alliteration, assonance, and onomatopoeia to achieve a poetic quality-. Of equal importance to Thoreau are the sounds of his writing and the sounds in his writing. Realizing the reality, depth, and texture Thoreau gives his prose through his remarkable treatment of sound increases one's appreciation of Walden as art and of Thoreau as literary artist.