space attenuation

space attenuation

[′spās ə‚ten·yə‚wā·shən]
(acoustics)
Loss of energy, expressed in decibels, of a signal in free air; caused by such factors as absorption, reflection, scattering, and dispersion.
References in periodicals archive ?
Consolidations are areas of increased air space attenuation which obscure the underlying vascular markings23 (Figure.6).
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