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What is the technique in which the high frequency components are amplified more than the low frequency components in FM?

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What is the technique in which the high frequency components are amplified more than the low frequency components in FM?

(a) Garble

(b) Preemphasis

(c) Detoriation

(d) Selective amplification

This question was addressed to me in my homework.

I'd like to ask this question from Noise Suppression Effects of FM topic in portion Amplitude & Frequency Modulation of Avionics

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Correct choice is (b) Preemphasis

Explanation: Preemphasis is a technique in which the high frequency signals are amplified more than the lower frequency signals to have better resistance to noise. It is usually used to transmit sounds from musical instruments which have high frequency harmonics.

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