amplitude modulation
amplitude modulation — noun
1. a method of radio transmission where the strength of a carrier wave is varied to
a method of radio transmission where the strength of a carrier wave is varied to carry sound or data
Liam's grandfather still tunes in to amplitude modulation radio every morning before breakfast.
collocation: tune in to + amplitude modulation radio
The coastal weather station broadcasts storm alerts using amplitude modulation around the clock.
using + amplitude modulation for the means of transmission
Amplitude modulation signals can travel hundreds of kilometres at night, reaching distant towns.
Gabriel repaired a vintage amplitude modulation receiver that he bought at a garage sale.
Some emergency services still rely on amplitude modulation because the equipment is simple and cheap.
- AM
the standard abbreviation, used far more often than the full term in everyday speech and on radio dials
- frequency modulation
a radio technology that varies the frequency of the carrier wave instead of its strength, producing clearer sound with less interference
文法句型
amplitude modulation + noun
via/using + amplitude modulation
in + amplitude modulation
用法筆記
Almost always shortened to AM in everyday use. Amplitude modulation is more likely to pick up electrical noise (from lightning, power lines, or machinery) than frequency modulation (FM), which is why FM became the standard for music. AM remains common for talk radio and news because its signals travel farther, especially after dark.