These pathological oscillations often consist of an aberrant version of a normal oscillation. The amount of distortion is also related to final amplitude of the oscillation. The underdamped response is a decaying oscillation at frequency . The frequency only depends weakly on the wavelength of the oscillation. A sine wave or sinusoid is a mathematical curve that describes a smooth periodic oscillation. Sound is a traveling longitudinal wave which is an oscillation of pressure. The length of q corresponds to formula 6 divided by the wavelength of the oscillation. This "damped" oscillation is both clinically documented and mathematically modelled. The El Nino-Southern Oscillation is a major climate variability mode. The super-regenerative receiver works like that of an intermittent oscillation detection circuit. These periods are associated with the Atlantic multidecadal oscillation. The exponential in describes the envelope of the oscillation. Plasmons are a quantization of this kind of oscillation. Lagrange interpolation is susceptible to Runge's phenomenon of large oscillation. This is an 11-year oscillation in sunspot number.