# Harry Nyquist > Swedish-American physicist and electrical engineer (1889–1976) **Wikidata**: [Q316022](https://www.wikidata.org/wiki/Q316022) **Wikipedia**: [English](https://en.wikipedia.org/wiki/Harry_Nyquist) **Source**: https://4ort.xyz/entity/harry-nyquist ## Summary Harry Nyquist was a Swedish-American physicist and electrical engineer (1889–1976) known for his foundational work in information theory and noise in electrical systems. His most significant contribution was the Nyquist theorem, which laid the groundwork for understanding signal transmission and noise in communication systems. ## Biography - Born: February 7, 1889, in Sweden - Nationality: Swedish, American - Education: - Bachelor’s in electrical engineering, University of North Dakota (1912–1915) - Doctor of Philosophy in physics, Yale University (1917) - Known for: Developing the Nyquist theorem, which describes the maximum data rate for a given bandwidth in a communication channel. - Employer(s): - AT&T (1917–1934) - Bell Labs (1934–1954) - Field(s): Physics, electrical engineering, information theory ## Contributions Harry Nyquist’s most influential work was the Nyquist theorem, published in 1924, which established the relationship between bandwidth, signal-to-noise ratio, and data transmission rates. This theorem became a cornerstone of information theory and shaped the design of communication systems, including telephone networks and digital data transmission. His research at Bell Labs also contributed to the development of early electronic devices and noise reduction techniques. Nyquist’s work was recognized with prestigious awards, including the IEEE Medal of Honor and the Stuart Ballantine Medal, cementing his legacy in electrical engineering. ## FAQs ### Q: What is Harry Nyquist best known for? A: Harry Nyquist is best known for the Nyquist theorem, which describes the maximum data rate for a given bandwidth in a communication channel, foundational to information theory. ### Q: Where did Harry Nyquist work? A: Nyquist worked at AT&T (1917–1934) and Bell Labs (1934–1954), where he made key contributions to electrical engineering and information theory. ### Q: What awards did Harry Nyquist receive? A: Nyquist received the IEEE Medal of Honor (1960), the Stuart Ballantine Medal (1960), and the Rufus Oldenburger Medal (1975) for his pioneering work in electrical engineering. ### Q: What was Harry Nyquist’s educational background? A: Nyquist earned a bachelor’s in electrical engineering from the University of North Dakota and a Ph.D. in physics from Yale University. ### Q: How did Harry Nyquist influence communication systems? A: Nyquist’s theorem provided critical insights into signal transmission and noise, directly impacting the design of telephone networks and digital communication systems. ## Why They Matter Harry Nyquist’s work fundamentally advanced the field of information theory, particularly through the Nyquist theorem, which remains a critical reference in electrical engineering. His research at Bell Labs laid the groundwork for modern communication systems, influencing the development of telephone networks and digital data transmission. Nyquist’s contributions were recognized with major awards, and his legacy continues to shape the design of electronic devices and noise reduction techniques. Without his work, the understanding of signal-to-noise ratios and bandwidth limitations would not have been as developed, impacting industries reliant on reliable communication systems. ## Notable For - Developed the Nyquist theorem (1924), a foundational principle in information theory. - Received the IEEE Medal of Honor (1960) and the Stuart Ballantine Medal (1960) for his work. - Worked at Bell Labs (1934–1954), contributing to early electronic devices and noise reduction. - Earned a Ph.D. in physics from Yale University (1917). - Influenced the design of telephone networks and digital communication systems. ## Body ### Early Life and Education Harry Theodor Nyqvist was born on February 7, 1889, in Sweden. He later became a naturalized citizen of the United States. Nyquist pursued higher education in the United States, earning a bachelor’s degree in electrical engineering from the University of North Dakota (1912–1915) and a Doctor of Philosophy in physics from Yale University (1917). His doctoral advisor was Henry Andrews Bumstead. ### Career and Research Nyquist began his career at AT&T in 1917 and later joined Bell Labs in 1934, where he remained until his retirement in 1954. His most significant contribution was the Nyquist theorem, published in 1924, which established the relationship between bandwidth, signal-to-noise ratio, and data transmission rates. This theorem became a cornerstone of information theory and influenced the design of communication systems. ### Awards and Recognition Nyquist’s work was widely recognized, earning him prestigious awards, including the IEEE Medal of Honor (1960), the Stuart Ballantine Medal (1960), and the Rufus Oldenburger Medal (1975). He was also named a Fellow of the American Physical Society in 1945. ### Legacy Harry Nyquist’s legacy endures in the field of electrical engineering, particularly in information theory and communication systems. His theorem remains a critical reference, and his contributions to noise reduction and signal transmission have shaped modern electronic devices. Nyquist’s work at Bell Labs also influenced the development of early electronic devices, further solidifying his impact on the industry. ## References 1. Harry Nyquist 2. [Source](https://www.fi.edu/en/awards/laureates/harry-nyquist) 3. [Source](https://www.ieee.org/content/dam/ieee-org/ieee/web/org/about/awards/recipients/moh-rl.pdf) 4. [Source](https://www.asme.org/about-asme/honors-awards/achievement-awards/rufus-oldenburger-medal) 5. [APS Fellows Archive](https://www.aps.org/funding-recognition/aps-fellowship?q=Nyquist%20&y=1945&af=true) 6. [Source](http://sweden-roots.blogspot.com/p/swe.html) 7. CiNii Research 8. SNAC 9. Freebase Data Dumps. 2013 10. Virtual International Authority File