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Microphone

Use the Microphone slideshow posted in Canvas to help solve the crossword.
Horizontales
This type of microphone used carbon granules packed in an enclosed space.
This type of microphone was invented in the 1980s.
This type of microphone originally used crystals or salts.
I was one of the founders of the Western Electric Company
This type of microphone was invented in the 1960s.
I stand for micro electro mechanical system.
This microphone used anthracite coal between two electrodes.
This type of microphone originally used crystals or salts.
I patented the first dynamic microphone in 1877, even though they weren't popular until much later.
This type of microphone was invented in the 1990s.
This was a traverse current microphone in the shape of an octagon.
This type of microphone was invented in the 1920s.
I demonstrated my new microphone with a box containing...
Verticales
We are also known as capacitor microphones.
The derived unit of electrical resistance.
I had the first successful speech transmission over the telephone.
The effective electrical resistance of a circuit to AC.
Two conductive rods were immersed in an acidic solution in this design.
This type of microphone was invented in the 1950s.
I designed a new type of microphone in 1878.
This type of microphone was invented in the 2010s.
I went on to create my own company under my own name. You can still buy my products today.
I developed the first capacitor microphone.
This type of microphone was invented in the 1930s.
The microphone I invented did not even work well enough for intelligible speech.
The name of my assistant that I "called".