Radio

（重定向自Radio transmission）

The Alexandra Palace, here: mast of the broadcasting station

Radio communication. Information such as sound is converted by a transducer such as a microphone to an electrical signal, which modulates a radio wave sent from a transmitter. A receiver intercepts the radio wave and extracts the information-bearing electronic signal, which is converted back using another transducer such as a speaker.

An audio signal (top) may be carried by an AM or FM radio wave.

Radio is the use of radio waves to carry information, such as sound, by systematically modulating some property of electromagnetic energy waves transmitted through space, such as their amplitude, frequency, phase, or pulse width. When radio waves strike an electrical conductor, the oscillating fields induce an alternating current in the conductor. The information in the waves can be extracted and transformed back into its original form.

单词	Radio transmission
释义	Radio transmission 原声例句《自然》阅读精选 Astronomer Frank Drake pioneered SETI in 1960, when he pointed a telescope in Green Bank, West Virginia, towards two stars and listened for radio transmissions. 天文学家弗兰克·德雷克在1960年开创了 SETI，当时他在西弗吉尼亚州的格林班克将望远镜指向两颗恒星，并监听无线电传输。跟马修学英语 Its source remains a mystery to this day, and is widely considered to be the best alien radio transmission ever received. 它的来源至今仍是个谜，被广泛认为是有史以来最好的外星无线电传输。 CNN 听力 2014年3月合集 At 1: 07 a.m., near the East Coast of Malaysia, the system known as ACARS stops transmitting information about the plane's operating condition, and that was before the last radio transmission. 07分，马来西亚东海岸附近, 被称为ACARS的系统停止发送飞机的操作信号, 就在最后的无线电传输之前。跟马修学英语 Other sources do exist but the most chilling account comes from the Judica-Cordiglia brothers, two Italian amateur radio operators who claim to have recorded secret radio transmissions from an unknown cosmonaut in space as he slowly suffocated. 其他消息来源确实存在，但最令人毛骨悚然的说法来自 Judica-Cordiglia 兄弟，他们是两名意大利业余无线电操作员，他们声称记录了一位不知名的宇航员在太空中慢慢窒息时的秘密无线电传输。英语百科 Radio （重定向自Radio transmission） Radio is the use of radio waves to carry information, such as sound, by systematically modulating some property of electromagnetic energy waves transmitted through space, such as their amplitude, frequency, phase, or pulse width. When radio waves strike an electrical conductor, the oscillating fields induce an alternating current in the conductor. The information in the waves can be extracted and transformed back into its original form.
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