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Learn about the history, function, uses, benefits and risks of Ultrasonography as a medical imaging technology.
What is the difference between sound and noise? How do they affect your hearing? And is noise always a bad thing?
A Canadian researcher built the first voltage-controlled synthesizer in the 1940s.
Learn how sound travels in waves and how it is measured in this backgrounder.
Using stethoscopes, doctors can use sound waves to detect various health issues. Learn how this device has evolved since it was invented in 1816!