For the first time, Lazaro Spallanzani understood the 18th century Italian knowledge of the wars, the obstacles in the darkness of the night, and the distinction between the sound waves that they stood and the return of their sound waves.

The first practical use of sound waves was during the Second World War

In the 1950s, the use of this technique began in the field of medicine. Dr. Ian Donald from Glascow found that a baby in her mother’s womb could be examined by ultrasound. With this method, it is possible to determine the number of months and the position of the baby in the mother’s womb today, whether it is a danger to her or not, even if it is a twin or triplet, or even gender.

Furthermore, by ultrasound technique it is possible to identify liver, Share information is also available.

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