•2/05/2009 10:41:00 a. m.

En 1876 se logró transmitir por primera vez la voz humana a través de cables eléctricos

En el año 1830, Samuel Morse inventó un nuevo código, que originó el uso de lo que hoy conocemos como comunicación telegráfica. Más tarde, en 1865, el físico escocés Maxwell dijo al mundo que las oscilaciones eléctricas de frecuencias muy elevadas, podían expandirse en el espacio a una velocidad de 300.000 Km/seg.

En 1876 Alexander Graham Bell y su asistente, lograron transmitir la voz humana a través de cables eléctricos.
En 1887, el físico alemán Heinrich Hertz puso en práctica la hasta entonces teoría - que las oscilaciones eléctricas de alta frecuencia podían viajar y propagarse por el espacio-. A partir de ese momento Hertz entró a la historia de la radio con su apellido puesto en las ondas electromagnéticas u ondas hertzianas.

De igual manera, se pasó a denominar hertzio a la unidad básica que mide la frecuencia de las citadas ondas.

Días y años corrieron y en 1897 Guillermo Marconi estableció comunicación telegráfica sin hilos. 40 meses después y en equipo - como se hace la radio - la humanidad saltó a la comunicación sin cables. Nacía la radio y con ella, el mundo de las palabras que recrea escenarios y conquista la imaginación.

Muchos pasos se dieron para conseguir la comunicación inalámbrica y podríamos resumir diciendo que Volta, Ampère, Henry, Faraday, Maxwell, Morse, Marconi, Graham Bell y Hertz hicieron equipo – sin saberlo – para crear la comunicación sin cables.

En 1922 la radio comercial alzó sus micrófonos para emitir cuñas publicitarias y tras pocos meses, programas. Fuente (La Radio un medio para la imaginación, escrito por Tito Ballesteros).
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