To cause the amplitude, frequency, phase, or intensity of a carrier wave to vary in accordance with a sound wave, the process is called?

The process of causing the amplitude, frequency, phase, or intensity of a carrier wave to vary in accordance with a sound wave is known as modulation. This technique is essential in telecommunications as it allows information to be transmitted over long distances by altering a higher frequency carrier wave according to the properties of the input signal, such as audio. Modulation enables effective communication by making the signal suitable for transmission through various media and helps in reducing interference from other signals.

In contrast to the correct term, modification generally refers to altering something in a more general sense and does not specifically apply to the manipulation of waves. Metamorphosis primarily describes a transformation in biology and is not relevant in the context of signal processing. Multiplexing is a technique used to combine multiple signals into one signal over a shared medium but does not involve varying the parameters of a carrier wave in relation to a sound wave. Thus, the correct answer clearly aligns with the definition of modulation in the context of wave processing.