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This remarkable German physicist, Heinrich Hertz, was born on February 22, 1857, in Hamburg, Germany. He showed gifts for languages such as Latin, Sanskrit, and Arabic. He received a PhD cum laude from the University of Berlin, soon taking position as a lecturer in theoretical physics at the University of Kiel.
Hertz proved Maxwell's theory of light and heat being of electromagnetic radiation. Soon after, he published two papers on contact mechanics. As he discovered many things, he did not take into consideration the use of his work later on for wireless communication.  He came down with Wegener's granulomatosis, dying soon after, being only 36.

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Pierre Curie was born on May 15, 1859 in  Paris, France. Soon to be 26, Curie married Marie Curie, who would later be crowned a physicist and chemist. In 1903, Curie won the Nobel Peace prize along with his wife, Marie Curie.  Along with this prize, he also won the Davy medal in 1903 and the Matteucci medal in 1904. After living a nice life with a loving wife, Pierre Curie died on April 19, 1906

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Gustav Kirchhoff was a German physicist who was born on March 12, 1824 in Konigsberg, East Prussia, which is now known as present-day Kaliningrad, Russia. In 1845, Kirchhoff created a paper detailing his circuit laws, known now as "Kirchhoff's Laws." Throughout his life, he received medals such as the Rumford medal, which he acquired through his research. As he grew older, he discovered elements like Caesium and Rubidium. He aged drastically, dying at the age of 63, being laid to rest in St. Matthaus Kirchhoff Cemetery in Berlin.

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Sir Oliver Lodge was a British physicist, born on June 12, 1851, in Penkhull, England. He studied at the University of London, becoming a professor of physics in 1877. Just as Kirchhoff and Curie, Lodge was awarded a medal (Albert Medal of the Royal Society of Art) for his work wireless telegraphy and pioneer work.
He posted his first report of his studies in 1890, at the age of 39. He was able to converse his feelings about the dead being alive, as he had stated a year earlier. Sadly, he met his demise on August 22, 1940, in Amersham, England.

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Edwin Herbert Hall, or known as just Edwin Hall, was born on November 7,1855, in Great Falls, Maine. He met a woman by the name of Caroline Eliza Bottum, who he later married in August of 1822.
Hall is credited with the discovery of the "Hall Effect," describing the voltage difference across an electrical conductor.
Before Hall became famous, he was the Principal of Physics at Harvard University. He waited to earn his PhD from Johns Hopkins University in 1880.
Edwin Hall suffered from congestive heart failure, leading up to his death in Cambridge, Massachusetts, on November 20, 1938.

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Kirchhoff has many laws, and they are sometimes known as "Isaac Laws."

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Heinrich Hertz was able to discovery many things in the time of his life. It was not until later that all of his research came into use for the declarations of the public.
These items were originally called Hertzian waves, considering they were discovered by Heinrich Hertz in the year of 1886. Even as Hertz did not exactly create the first wireless transmitters, Guglielmo Marconi incorporated many of Hertz's ideas and research items.

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Edwin Hall discovered what is now known as the Hall Effect. It revolves around the  voltage difference of an electrical conductor. It states that if an electric current flows through a conductor in a magnetic field, the field shows a transverse force on the moving charges, pushing them to one side of the conductor. A buildup in charge at the sides of the conductors is able to balance the magnetic influence, producing a measurable voltage between both sides of the conductor. This unimaginable phenomenon was discovered by Edwin Hall in the year of 1879.

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As the most used form of loudspeaker, Lodge had discovered how to create such a thing through his research. The loudspeaker performs well and is able to be manufactured relatively easily, and is widely popular around the world. The moving coil loudspeaker uses the magnetic effect generated by a flowing current as the beginning of it's job.Then, a current flows in the wire, creating a magnetic field. When the wire is wound into a coil, the effect is increased.If the coil is placed into a steady magnetic field created by a fixed magnet, then the two magnetic fields will interact.  These are the basics of Lodge's invention.

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http://www.10-facts-about.com/Pierre-Curie/id/1621

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http://www.softschools.com/facts/scientists/gustav_kirchoff_facts/1991/

https://www.famousscientists.org/gustav-kirchoff/

https://isaacphysics.org/concepts/cp_kirchhoffs_laws

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https://www.encyclopedia.com/people/science-and-technology/physics-biographies/sir-oliver-joseph-lodge

https://www.electronics-notes.com/articles/audio-video/loudspeaker/moving-coil-speaker.php

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http://www.softschools.com/facts/scientists/heinrich_hertz_facts/1997/

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https://www.britannica.com/science/Hall-effect#ref273169

https://www.famousbirthdays.com/people/edwin-hall.html

http://hyperphysics.phy-astr.gsu.edu/hbase/magnetic/Hall.html