Today’s digital broadcasting makes use of the same frequencies as the pre-2009 analog transmission. • The เว็บพนันออนไลน์ ที่คืนยอดเสีย audio data is changed into an electrical signal of the same frequencies by, say, a microphone, a laser, or a magnetic learn write head. This electrical sign is known as an audio frequency signal, because the frequencies are in the audio range . Modulation is outlined as the process by which some characteristics (i.e. amplitude, frequency, and section) of a provider are varied in accordance with a modulating wave.
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