Comment on paper by Bhartendu, "A study of atmospheric pressure variations from lightning discharges"

Abstract

Bhartendu uses two types of microphones to provide the time series for his power spectral investigations of thunder, the hot wire microphone and a wide-range crystal microphone with amplification provided by a sound-level meter. He then takes power spectra calculated from these time series and states conclusions regarding the power spectrum of thunder. Data and discussion are presented here to demonstrate that one cannot use a single-grid hot-wire microphone for power spectral analysis without introducing spurious spectral components.