Different aspects of multiple‐pure‐tone (MPT) “broadband” noise generation in high‐speed fans are discussed. An analytical model for multiple‐pure‐tone generation is presented. Experimental evidence indicates that the MPT generation does not seem to be a function of the presence of shock waves. It is also shown that fan “broadband” noise is not broadband in character and could be attributed to the modulation of the blade‐passing‐frequency tones, their sub‐ and higher harmonics.