Difference between revisions of "Talk:FM Broadcast Radio Frequency Deviation"
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(Created page with "== loudness 1 == First, how FM works! FM is Frequency Modulation, the frequency transmitted varies around the centre carrier frequency (e.g. 98 MHz) that you set on your radio...") |
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Revision as of 09:57, 4 October 2023
loudness 1
First, how FM works! FM is Frequency Modulation, the frequency transmitted varies around the centre carrier frequency (e.g. 98 MHz) that you set on your radio — it would stay at exactly that frequency if the station transmitted silence — and it deviates proportional to the instantaneous value of the audio signal transmitted.
The stations want to appear louder , so the audio is processed, by compressing it's dynamic range (the range from quiet to full blast) which makes the quiet parts louder *without* increasing the level of the loud bits beyond the limit that would cause over-deviation and earn a fine.
