# Echo

An echo are a reflection of sound, arriving at the listener some time after the direct sound. Typical examples are the echo produced by the bottom of a well, by a building, or by the walls of an enclosed room. A true echo is a single reflection of the sound source. The time delay is the extra distance divided by the speed of sound.

## Quotes
### Hoyt's New Cyclopedia Of Practical Quotations

    Quotes reported in Hoyt's New Cyclopedia Of Practical Quotations (1922), p. 215.
* Let echo, too, perform her part, Prolonging every note with art; And in a low expiring strain, Play all the comfort o'er again.
** Joseph Addison, Ode for St. Cecilia's Day.
* Hark! to the hurried question of Despair "Where is my child?"—An echo answers—"Where?"
** Lord Byron, Bride of Abydos (1813), Canto II, Stanza 27.
* I came to the place of my birth and cried: "The friends of my youth, where are they?"—and an echo answered, "Where are they?"
** From an Arabic manuscript. quoted by Rogers, Pleasures of Memory, Part I.
* Even Echo speaks not on these radiant moors.
** Barry Cornwall, English Songs and Other Small Poems, The Sea in Calm, Part III.
* Mysterious haunts of echoes old and far, The voice divine of human loyalty.
** George Eliot, The Spanish Gypsy (1868), Book IV, line 149.
* Echo waits with art and care And will the faults of song repair.
** Ralph Waldo Emerson, May-day, line 439.
* Multitudinous echoes awoke and died in the distance. * * * * * * And, when the echoes had ceased, like a sense of pain was the silence.
** Henry Wadsworth Longfellow, Evangeline: A Tale of Acadie (1847), Part II, line 56.
* Sweetest Echo, sweetest nymph, that liv'st unseen Within thy airy shell, By slow Meander's margent green, And in the violet-embroidered vale.
** John Milton, Comus (1637), Song.
* How sweet the answer Echo makes To music at night, When, roused by lute or horn, she wakes, And far away, o'er lawns and lakes, Goes answering light.
** Thomas Moore, Echo.
* And more than echoes talk along the walls.
** Alexander Pope, Eloisa to Abelard (1717), line 306.
* But her voice is still living immortal, The same you have frequently heard, In your rambles in valleys and forests, Repeating your ultimate word.
** John Godfrey Saxe, The Story of Echo.
* The babbling echo mocks the hounds, Replying shrilly to the well-tun'd horns, As if a double hunt were heard at once.
** William Shakespeare, Titus Andronicus (c. 1584-1590), Act II, scene 3, line 17.
* Lost Echo sits amid the voiceless mountains, And feeds her grief.
** Percy Bysshe Shelley, Adonais, Stanza 15.
* Never sleeping, still awake, Pleasing most when most I speak; The delight of old and young, Though I speak without a tongue. Nought but one thing can confound me, Many voices joining round me, Then I fret, and rave, and gabble, Like the labourers of Babel.
** Jonathan Swift, An Echo.
* I heard * * * * * * the great echo flap And buffet round the hills from bluff to bluff.
** Alfred Tennyson, Golden Year, line 75.
* And a million horrible bellowing echoes broke From the red-ribb'd hollow behind the wood, And thunder'd up into Heaven.
** Alfred Tennyson, Maud; A Monodrama (1855), Part XXIII.
* Our echoes roll from soul to soul, And grow for ever and for ever. Blow, bugle, blow, set the wild echoes flying, And answer, echoes, answer, dying, dying, dying.
** Alfred Tennyson, The Princess (1847), IV, Bugle Song.
* What would it profit thee to be the first Of echoes, tho thy tongue should live forever, A thing that answers, but hath not a thought As lasting but as senseless as a stone.
** Frederick Tennyson, Isles of Greece, Apollo, line 367.
* Like—but oh! how different!
** William Wordsworth, Yes, it Was the Mountain Echo.
* The melancholy ghosts of dead renown, Whispering faint echoes of the world's applause.
** Edward Young, Night Thoughts (1742-1745), Night IX.