A pure sine wave has only one frequency, that's why it is analogous to a "pure t...

spfzero on Jan 15, 2023 | parent | context | favorite | on: The Fourier Transform, explained in one sentence (...

A pure sine wave has only one frequency, that's why it is analogous to a "pure tone". It's not a circular definition; they key part is the "pure", which means no dilution by other frequencies, which admittedly is not obvious.