Are there acoustic differences between the first- and second-generation Mini Bat recorders?

While the acoustic properties of both models are largely the same below 70kHz, the new Mini Bat 2 is more sensitive to sounds above 70kHz. This means that echolocations above that frequency (e.g. UK Horseshoe bats) will be clearer in the recordings, and more distant echolocations can be picked up.

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