What modulation type can provide more consistent sound quality over longer distances?

Frequency modulation is known for its ability to deliver more consistent sound quality over longer distances compared to other modulation types. This is largely due to the way frequency modulation encodes information by varying the frequency of the carrier wave rather than its amplitude. As a result, frequency modulation is less susceptible to noise and interference, which tend to affect amplitude-based signals more significantly.

In frequency modulation, changes in the amplitude do not influence the information being transmitted, thereby maintaining clearer sound quality even when the signal weakens over greater distances. This characteristic makes frequency modulation particularly advantageous for radio broadcasting and other audio transmission applications, where sound clarity is crucial.

In contrast, other modulation types may suffer from degradation in sound quality due to environmental factors and signal loss over distance. For example, analog modulation and amplitude modulation can be significantly affected by noise, leading to a drop in audio fidelity. Similarly, phase modulation, while effective in certain applications, does not provide the same level of noise immunity and sound consistency as frequency modulation does.