Ads
related to: am radio waves vs fm- Meet the Fire TV Family
See our devices for streaming your
favorite content and live TV.
- New deals. Every day.
Huge Selection and Great Prices.
Browse Available and Upcoming deals
- Shop Groceries on Amazon
Try Whole Foods Market &
Amazon Fresh delivery with Prime.
- Shop Echo & Alexa Devices
Play music, get news, control your
smart home & more using your voice.
- Explore Amazon Smart Home
Shop for smart home devices that
work with Alexa. See our guide too.
- Sign up for Prime
Fast free delivery, streaming
video, music, photo storage & more.
- Meet the Fire TV Family
Search results
Results From The WOW.Com Content Network
Amplitude modulation (AM) is a modulation technique used in electronic communication, most commonly for transmitting messages with a radio wave. In amplitude modulation, the amplitude (signal strength) of the wave is varied in proportion to that of the message signal, such as an audio signal .
AM broadcasting is radio broadcasting using amplitude modulation (AM) transmissions. It was the first method developed for making audio radio transmissions, and is still used worldwide, primarily for medium wave (also known as "AM band") transmissions, but also on the longwave and shortwave radio bands.
FM broadcasting is a method of radio broadcasting that uses frequency modulation (FM) of the radio broadcast carrier wave. Invented in 1933 by American engineer Edwin Armstrong , wide-band FM is used worldwide to transmit high-fidelity sound over broadcast radio . [ 1 ]
An American FM radio transmitter in Buffalo, NY at WEDG. Edwin Howard Armstrong (1890–1954) was an American electrical engineer who invented wideband frequency modulation (FM) radio. [12] He patented the regenerative circuit in 1914, the superheterodyne receiver in 1918 and the super-regenerative circuit in 1922. [13]
Radio waves are defined by the ITU as: "electromagnetic waves of frequencies arbitrarily lower than 3000 GHz, propagated in space without artificial guide". [5] At the high frequency end the radio spectrum is bounded by the infrared band. The boundary between radio waves and infrared waves is defined at different frequencies in different ...
Analog radio broadcasts use one of two types of radio wave modulation: amplitude modulation for AM radio, or frequency modulation for FM radio. Newer, digital radio stations transmit in several different digital audio standards, such as DAB (Digital Audio Broadcasting), HD radio, or DRM (Digital Radio Mondiale).
Ad
related to: am radio waves vs fm