Medical dictionary. 2011.
acoustical holography — acoustical holography, holography that uses sound waves instead of laser light to produce a three dimensional picture: »Hence, a hologram can be recorded with sound waves and then reconstructed with light. This technique is called acoustical… … Useful english dictionary
acoustical hologram — acoustical hologram, a picture produced by acoustical holography … Useful english dictionary
Acoustic holography — is a method used to estimate the sound field near a source by measuring acoustic parameters away from the source via an array of pressure and/or particle velocity transducers. Measuring techniques included within acoustic holography are becoming… … Wikipedia
Acoustic microscopy — Introduction = Acoustic microscopes employ very high or ultra high frequency ultrasound. These microscopes operate nondestructively and penetrate most solid materials to make visible images of internal features, including defects such as cracks,… … Wikipedia
so|nog|ra|phy — «suh NOG ruh fee», noun. = acoustical holography. (Cf. ↑acoustical holography) … Useful english dictionary
ultrasonics — /ul treuh son iks/, n. (used with a sing. v.) the branch of science that deals with the effects of sound waves above human perception. [1930 35; see ULTRASONIC, ICS] * * * Vibrational or stress waves in elastic media that have a frequency above… … Universalium
son|o|graph — «SON uh graf, grahf», noun. 1. a) a device for producing a graphic representation of sounds. b) the representation, usually in the form of phonetic characters, produced by this device. 2. »There is a sonograph…showing a six month old human fetus… … Useful english dictionary
акустическая голография — Метод получения изображений дефектов, основанный на обработке принятых сигналов с учетом их амплитуд, фаз и времени прихода. Используется преимущественно для экспертной оценки характеристик обнаруженных дефектов. [Система неразрушающего контроля … Справочник технического переводчика
son|o|ra|di|og|ra|phy — «SON uh RAY dee OG ruh fee», noun. the production of three dimensional X ray pictures by means of acoustical holography … Useful english dictionary
History of radar — The history of radar starts with experiments by Heinrich Hertz in the late 19th century that showed that radio waves were reflected by metallic objects. This possibility was suggested in James Clerk Maxwell s seminal work on electromagnetism.… … Wikipedia
