What is the typical use of frequency modulation in broadcasts?

The typical use of frequency modulation (FM) in broadcasts is primarily for achieving better sound quality for voice communications. FM works by varying the frequency of the carrier wave in accordance with the amplitude of the audio signal, which helps to provide a more robust and clearer sound. This technique is particularly effective in reducing the effects of noise and interference that can occur during transmission. As a result, FM broadcasts are often utilized for radio stations, especially music and talk radio, where high fidelity sound is essential for listener satisfaction.

In contrast, while FM does contribute to noise reduction, its primary purpose isn't solely to minimize background noise. Methods like amplitude modulation (AM) can be more susceptible to noise, which is why FM is favored in many cases. As for increasing the range of wireless signals, while FM can have a longer range under certain conditions compared to AM, that is not its primary function. Furthermore, FM is not inherently designed to transmit data at a higher speed; other modulation techniques are often employed for data transmission, such as phase shift keying (PSK) or quadrature amplitude modulation (QAM), which are better suited for high-speed data communication. Thus, the emphasis on better sound quality in voice communications solidifies why this choice is the correct answer