|
lab recording, 27/7/1988, 24°C (Sony WM-D3 with QMC mini bat detector at 25 kHz, tape UX-Pro90, tape no. YU2/88:294-382) lab recording, 27/7/1988, 23°C, 60 W bulb for heat (Sony WM-D3 with QMC mini bat detector at 20 kHz, tape UX-Pro90, tape no. YU2/88:435-454, partly rivalry calls) |