echometry

Noun

echometry (uncountable)

1. (obsolete) acoustics;
   • A-men, Ar-men, Am-men, and Ah-men, and every other prefix and accentuation of men, that the love of variety could suggest, or the art of echometry command, were poured forth with a vigor and energy, that common throats would have "swelled to bursting night."1845 January, "an Observer", “Methodistic Enthusiasm”, in Alexander Campbell, Charles Louis Loos, editor, The Millennial Harbinger, volume 2, number 1, page 12
   1. (obsolete) The art of constructing vaults to produce echoes.
      • Blanc, in his Echometry, at the end of his first book of the sphere, teaches the method of making an artificial Echo.1788, John Carter, The Builder's Magazine, page 206
      • although construction of the Banqueting House began a few months before Jones could have had the benefit of Biancani's echometry, Jones was immersed in the Bitruvian tradition and would have been aware of the importance given to resonance and echo in the De Architectura.1984, Joseph Loewenstein, Yale Studies in English - Volume 192, page 60
   2. (obsolete) A hypothetical science of echos.
      • The science of echometry is a capricious science. The millionaire was disgusted, when his rich ruttish voice failed to produce a response; he was more disgusted on being told that to no one but the little son of his own gamekeeper would the echo reply at all.1917 November, Bernard Capes, “La Morgue Littéraire”, in William Makepeace Thackeray, editor, The Cornhill Magazine, volume 43, number 257, page 464
      • In the Harmonie universelle, Marin Mersenne refers to the fable of Pan and Echo in order to introduce the desideratum of a new science of "echometry” (Mersenne 1636: 50–53).2022, Dana Jalobeanu, Charles T. Wolfe, Encyclopedia of Early Modern Philosophy and the Sciences, page 656
2. The scientific measurement of sounds or echoes.
   • It treats of Arithmetic with separate pagination, and is one of the earliest works on commercial arithmetic published in Scotland; the terrestrial glove; the elements of astronomy (p. 54); the principles of geography (p. 71); and echometry or science of measuring sound (p. 107) .1915, Records of the Glasgow Bibliographical Society - Volumes 3-5, page 52
   1. The use of reflected sound waves to measure the shape or movement of objects.
      • In determining dynamic level of liquids in bore-holes by existing methods and apparatus, eg by gas volumes in piping, echometry etc, much time is required together with elaborate apparatus, often yielding unsatisfactory results without possibility of studying in situ all special features in...1951, Industrial Diamond Abstracts - Volume 8, page 98
      • Lovetskaya (1958) established by echometry that bigeye kilka move away from light with a speed of 7 m/min.1975, I. V. Nikonorov, Interaction of Fishing Gear with Fish Aggregations, page 71
   2. The use of ultrasound echos to make biometric measurements (as opposed to making images, which is called medical ultrasound).
      • The acoustics system design for echometry is significantly different from that of tissue-structure mapping in that diffuse backscatter is essential.1992, Robert John Weber, David N. Perkins, Inventive Minds: Creativity in Technology, page 139
      • Manufacturers of IOLs are of course aware of this fact and determine the A- or ACD constants of their lenses in such a way that optimum results are achieved with contact echometry.2004, H. John Shammas, Intraocular Lens Power Calculations, page 148