ATI T-12 Complete Practice Test 2025

The term that defines an exact multiple of a fundamental frequency is known as a true harmonic. In the context of sound waves and frequencies, harmonics are integral multiples of a fundamental frequency. For example, if the fundamental frequency is 100 Hz, then the first harmonic would be 200 Hz, the second harmonic would be 300 Hz, and so forth. This concept is essential in various fields, including acoustics, music, and signal processing, as it helps to understand the structure of waves and the relationships between their frequencies.

Other terms may relate to frequency but do not fit the definition of an exact multiple of a fundamental frequency. Subharmonics are fractions of the fundamental frequency, while modulated frequencies refer to frequencies that have been altered through modulation techniques. Sampling frequency pertains to the rate at which a sound wave is sampled to convert it into a digital signal, which is not inherently tied to multiples of a fundamental frequency. Thus, true harmonic is the most accurate answer in this context.