"En la década que va de los años 40 hasta los 50, la radio se fue transformando en un medio de comunicación masivo tanto en América como n Europa. En los Estados Unidos, la radio ya había acreditado sus magníficas posibilidades como soporte publicitario y fue precisamente la publicidad que en adelante sería su única fuente de financiación. Este modelo de explotación comercial del medio radiofónico tendria una importancia decisiva para el desarrollo de una programación competitiva destinada a conseguir el máximo número de oyentes, con el fin de atraer la inversión de los anunciantes".

Martí-Martí, Josep Maria, "La programación Radiofónica" apud MARTINÉZ-COSTA, María del Pilar e MORENO MORENO, Elsa, Programación Radiofónica, Ariel, Barcelona, 2004, pág. 25

"Since radio’s inception, the industry has been threatened by a number of competing technologies including: the 8-track tape, cassette recorder, digital audio devices and perhaps most prominently, television.  The advent of broadcast television in middle class America resulted in the only period of revenue loss for terrestrial radio from 1951 to 1955 (Bachman, 2005). Radio responded to television with new music driven programming models.  Later, technological advancements led to FM radio, which caused internal disruption of the industry, but inevitably resulted in the AM dial embracing talk radio, today’s most popular radio format. 

in Consumer Adoption of New Radio Distribution Systems, pág. 9

“It was during the war and for the ten years or so after it that radio enjoyed its heyday, providing programmes of distinction in every genre to audiences of many millions. (Crisell, pág. 25)

Na Grã Bretanha dois acontecimentos despertaram a televisão da letargia em que se encontrava, em parte provocada pela falta de um modelo televisivo (a televisão reproduzia a rádio, dando-lhe apenas imagem). Em 1953 a coroação da Rainha Isabel II e 1955 o aparecimento de um canal comercial, independente do Estado e do monopólio da BBC. “Two major events of the 1950s were seen, accurately, as marking its arrival as the major mass medium and less accurately as portending the very extinction of radio, whose blindness was regarded by many as an unequivocal disadvantage” (Crisell, 26). (…) “Faced with competition from first one and then two television networks, radio went into a long decline that some thought would prove terminal. Between 1949 and 1958 the BBC’s average evening radio audience dropped from nearly 9 million to less than 3.5 million, three-quarters of whom were people without television sets” (Crisell, 27)