AM radio

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AM radio

[¦ā¦em ′rād·ē‚ō]
(communications)

AM radio

(Amplitude Modulation radio) Radio broadcasting in the 540-1610 kHz frequency band (in the Americas) with 10 kHz spacing between channels. AM technology modulates a carrier by varying the signal strength, not by frequency as with FM. For 30 years starting in the 1920s, AM flourished in the so-called "Golden Age of Radio." However, starting around the late 1950s, FM's higher fidelity became popular for music listening. Most AM radio stations today broadcast news, talk, traffic and weather. See FM radio and shortwave radio.
References in periodicals archive ?
This isn't a new phenomenon -- even when our transmission ran on the AM broadcasting channel, we had a strong relationship with bachelors.
The carrier level in traditional AM broadcasting is constant, and is used as the reference level to determine the modulation of audio being broadcast," said Mark Grant , CEO of Belar Electronics.
We want to reflect the vibrant community, and I'm sure when we have our studio and our AM broadcasting frequency and licence we will be able to engage with the local community and do just that.
The early history of FM radio is usually told in terms of the legal battle between Edwin Howard Armstrong, the inventor of an FM broadcasting system, and the Radio Corporation of America, which viewed FM radio as a threat to its AM broadcasting technologies.
Sadly, the history of technological innovation in the mass media is a breathless parade of new gadgets touted as a new pathway to social betterment and enlightenment--from AM broadcasting to cable proliferation, from satellite TV to TiVo.
HOSPITAL radio in Nuneaton is stepping into the 21st century with the capture of an AM broadcasting license.
That won't happen anytime soon, if ever; no more than movies replaced theater, FM replaced AM broadcasting, or television replaced radio.
The design and measurement of small AM broadcasting antennas is the topic of Chapter 7.
However, AM broadcasting was susceptible to static, and in the 1930s and 1940s Armstrong worked to perfect FM transmission and reception, which was not affected by static emissions.
By the time Tindall arrived at the Bishop Street studios, KHVH was already on the verge of losing the AM broadcasting tower site; both its AM news and sister-FM station music formats needed overhauling; and its surfeit of executives constituted a whopping overhead, crushing the company under its own weight.
I am pleased to report that the Media Bureau staff, to date, granted 80 percent of these applications, a critical step towards ensuring the long-term viability of AM broadcasting.
The AM Broadcasting (AMB) Subcommittee adopted the first-ever NRSC Guideline, NRSC-G100, Bandwidth Options for Analog AM Broadcasters.