Here the recording of the grasshopper Ringed Bush-cricket, Rhacocleis annulata, first record for Northern Italy, which produces a call that is difficult to hear without the aid of a bat detector.
The first ten phrases using a bat detector; the second ten phrases using a Zoom H1 and an AOM5024 PUI microphone.
Below a recording using an ultrasonic USB microphone Ultramic 384k by Dodotronic.
For comparison, I also made a recording using a Zoom H1 recorder and an external DIY stereo microphone system with 2x Primo EM172 capsules.
Despite having a decidedly higher self-noise than the EM172 capsule, the 384k has proved to be more suitable for recording high frequencies, as it was likely to be expected.
note: I didn’t cut the passage of the car to highlight the difference at low frequencies.
In the background Oecanthus pellucens and Eupholidoptera schimdti
details of the “cerci” of Rhacocleis annulata
details of the “cerci” of Rhacocleis germanica
Highlighted tipical rings of R. annulata
extremity of the abdomen with the spermathophylax that is the gelatinous mass
I wish to thank my friends Cesare Brizio e Filippo Maria Buzzetti for helping me in recognizing the species.