Radio encompasses several key types based on purpose and technology. Your choice depends on whether you want entertainment or specialised content. Radio can be broadly classified into Broadcast radio, Two-way Communication radio and Internet-based radio.
Broadcast radio transmits one-to-many signals for public listening, including traditional analogue formats like AM (long-range, talk-focused) and FM (higher quality, music-focused), as well as digital formats like DAB/DAB+ (outside the US), HD Radio (US), and Satellite Radio.
Two-way communication radios enable point-to-point or group interaction, such as Walkie-Talkies (FRS/GMRS), CB (Citizens’ Band) Radio, licensed amateur radio (Ham Radio), Marine VHF, and Aviation Radio.
Internet-based radio is a digital form of broadcasting where radio programmes are streamed online through the internet instead of traditional AM, FM, or satellite signals.
Given below are other subtypes of radio.
AM Radio (Amplitude Modulation): AM radio transmits audio by varying the amplitude of the radio signal. It is known for its long-range transmission and is used for news and music.
Examples: All India Radio (AIR) operates several AM stations nationwide, including AIR Delhi and AIR Thiruvananthapuram.
FM Radio (Frequency Modulation): FM radio broadcasts by varying the signal frequency. Compared to AM radio, it offers better sound quality and less interference. It is popular for music and entertainment.
Examples: Popular FM stations in Kerala include Radio Mirchi, Red FM, Club FM 103.8, and 92.7 Big FM.
Community Radio: Community radio stations are local radio stations run by community members. They focus on regional issues.
Examples: Radio Maattoli (the first community radio in Kerala; from Wayanad), Radio DC 90.4 (Community Radio by DC School of Management, Thiruvananthapuram), Radio Active (Bangalore), Radio Udaan (a community radio station that aims to promote human rights of differently-abled people)
Amateur Radio / Ham Radio: Amateur radio is operated by private individuals for personal use and experimentation. It requires a license to operate. Ham radio operators in India use the frequencies allocated by the Wireless Planning and Coordination Wing (WPC).
Examples: Trivandrum Amateur Radio Society (TARS) and Quilon Amateur Radio League.
Educational Radio: Educational radio stations focus on educational programmes and often collaborate with schools and universities to provide academic programmes.
Examples: Gyan Vani station (an educational FM radio network featuring programmes from academic institutions, NGOs, and national institutions), and Mukta Vidya Vani (an educational web radio service).
Internet Radio: Internet radio streams audio content over the Internet and is accessible via computers and mobile devices.
Examples: Radio Mirchi 98.3 FM and Vividh Bharati, 92.7 Big FM.
Satellite Radio: Satellite radio uses satellites to broadcast radio signals across large areas, often providing a variety of channels with clear sound quality.
Examples: XM Satellite Radio and Sirius Satellite Radio.
WORKS CITED
Crisell, Andrew. An Introductory History of British Broadcasting. 2nd ed., Routledge, 2002.
Sterling, Christopher H., and Michael C. Keith. The Museum of Broadcast Communications Encyclopedia of Radio. Vol. 1, Fitzroy Dearborn, 2004.
Dr Aswathy Aravindakshan is a teacher, bilingual writer and artist with over two decades of experience in teaching English language and literature. She currently serves as Assistant Professor of English at NSS College for Women, Thiruvananthapuram, Kerala, India. Her blog, ashlit.in brings together academic resources, creative writing in Malayalam and English, and visual art. The platform features lecture notes, study materials, poems, reflections, short prose, and a curated collection of her paintings. Through this space, she seeks to foster learning, creativity, and meaningful engagement with literature and the arts.
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