Dielectric constant audio frequency

The electronic polarization is so rapid that there is no observable effect of time or frequency on the dielectric constant until frequencies are reached which correspond to the visible and ultraviolet spectra. For convenience, the frequency range of the infrared through the ultraviolet region is called the optical frequency range, whereas that including the radio and the audio range is called the electric frequency range. 

Correlated transport studies (including temperature dependent dc conductivity, audio-frequency (lOHz-105 Hz) conductivity and dielectric constant, electric field dependence of conductivity, thermopower, electron spin resonance, microwave conductivity and dielectric constant) have been carried out on oriented emeraldine hydrochloride films [15], the... 

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