Which is true regarding amplitude and frequency?

The relationship between amplitude and frequency is a fundamental concept in speech science and acoustics. The correct interpretation is that they are independent from each other. Amplitude refers to the maximum extent of a vibration or oscillation, which is related to the loudness of a sound. In contrast, frequency pertains to the number of oscillations or cycles that occur in a given time period, which determines the pitch of a sound.

While both amplitude and frequency are properties that describe sounds, they do so in different ways and do not influence one another directly. For example, a sound can be high in amplitude (loud) but low in frequency (low pitch), or vice versa. Understanding this independence helps to differentiate between the perception of loudness and pitch in audio signals, which is crucial for analyzing sounds, including speech.

The other options suggest relationships or characteristics that do not accurately reflect the nature of amplitude and frequency. They do not describe the same property of sound, nor do they measure loudness collectively. Thus, recognizing that amplitude and frequency are independent allows for a clearer understanding of sound properties in various contexts, including speech science.