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调频广播.
调频广播
调频广播(英语:Frequency Modulation Broadcast,常缩写为 FM 广播)是一种以频率调制技术来传送高保真声音的无线电广播技术,由埃德温·霍华德·阿姆斯特朗(Edwin Howard Armstrong)于1933年发明。调频广播音质要明显优于调幅广播,但覆盖范围却相对有限。
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