missing fundamental

On-line sound examples comparing pure and complex tones and complexes with missing fundamentals can be found here.

It is possible for such lattice modes to combine with higher-frequency modes giving weak additional features near strong fundamental bands, or near the expected positions of weak or missing fundamentals.

The missing fundamentals center on the nature of demand in a mature economy, the market's penchant for new goods and services, the declining real costs of most products and the dynamism of our economy.

Research conducted at Heidelberg University shows that, under narrow stimulus conditions with a small number of harmonics, the general population can be divided into those who perceive missing fundamentals, and those who primarily hear the overtones instead.

Yet another application is in design of small or lower-quality loudspeakers, which use the phenomenon of missing fundamentals to give the effect of low frequency bass notes that the system, due to frequency limitations, they cannot actually reproduce (see references).