Sampling Frequency For Digital/TE Detectors
Research in 2010 observed that frequencies used by bats can be has high as 250 kHz.). The Nyquist–Shannon sampling theorem observes that the minimum sampling frequency required to record a signal successfully must be greater than twice the bandwidth of the signal. To record a bandwidth of 250 kHz therefore requires a sampling frequency in excess of 500 kHz. Modern Time-Expansion capable units typically sample at between 300 kHz and 700 kHz. In general, faster is better, though a higher sampling frequency does use more storage space.
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