FM Radio: AM radio was a major advancement in mass communications, but it suffered from a lot of noise. Edwin Armstrong Invented wide band FM radio in 1933 after years of developing new radio receivers. FM radio has a good range at reasonable power levels, sounds great, and is more resistant to noise than AM. RCA rejected the immediate transition to FM, so Armstrong funded his own work. FM radio forever altered music by helping to create new forms of music and exposing older forms to wider audiences, and it helped create conservative talk radio.
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