Preposition: of

• frequency: When you perform Fourier analysis, you assume that the signal is composed of sine waves of different frequencies.

Adjective modifier

• single: The spectrum contains just one component, at 256 Hz, because the pure tone is a single sine wave.

• enough: The Spectrum Any sound can be constructed by adding up enough sine waves of differing intensity levels, frequencies and starting times.

Modifies a noun

• supply: This is not a pure sine wave supply, we cannot be held responsible for any damage caused to computer equipment and personal appliances.