harmonic echo

harmonic echo

[här¦män·ik ′ek·ō]
(acoustics)
An echo that appears to be higher in pitch than the original sound, due to enhancement of harmonics in the original complex tone.
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References in periodicals archive ?
Extended Pure Harmonic Detection (ExPHD), Tissue Harmonic Echo by phase- modulation method is in the standard specification.
This can be useful for contrast harmonic echo examination especially low MI contrast media.
With Harmonic Echo, in particular, ProSound creates high- resolution, high-sensitivity images only from harmonic components, taking advantage of its wide aperture and pure sound transmission features.
The system has been designed to incorporate Aloka's proprietary ProSound package of technologically advanced features including; Digital Pure Beam imaging, Tissue Harmonic Echo technologies, 3-D Color Doppler capabilities, a 12-bit AD converter to enable higher contrast resolution, and an integrated DICOM compatible image management solution.