Which modulation technique is typically used for higher quality sound in FM radio?

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Frequency Modulation (FM) is the correct choice for achieving higher quality sound in FM radio broadcasting. This technique varies the frequency of the carrier wave in accordance with the amplitude of the input signal, which results in a greater fidelity and improved resistance to interference and noise compared to other modulation methods.

FM broadcasting allows for a broader bandwidth, which can carry more audio information, leading to better sound quality. This is particularly important in music and high-fidelity audio transmissions, where clarity and range are essential for an optimal listening experience.

The other techniques mentioned have different applications and limitations. For example, Amplitude Modulation (AM) is more susceptible to noise and has a narrower frequency range, which negatively impacts sound quality. Phase Modulation is often related to digital communication systems rather than traditional radio broadcasting. Pulsed Modulation is not typically used for standard audio transmission in mass media like radio, making FM the standard choice for high-quality sound transmission.