Audio Moth

Recordings made with AudioMoth at 384ksps 16bit, low gain. The microphone is protected by a 3micron aluminised Mylar film. Recorded at Colney Heath Conservation Area (51.78263, -0.271419) at 20:16 BST on April 4 2018. The 4 minute long recording includes Nyctalus Leisleri (>20kHz), Pipistrellus pipistrellus(fm down to 45kHz), Pipistrellus pygmaeus (fm down to 52kHz) and Myotis daubentonii (broad fm down to 30kHz). The second recording also includes a Noctule and a possible Serotine at the same location. The .png screen shot shows a comparison of the same pass recorded on the Audio Moth at ground level angled at 45 degrees, and a Petterson M500-384 handheld at chest height.CHC18-1p_20180406_203333.wav and CHC18-1am2_20180406_203154.wav are overlapping recordings made with the AudioMoth and Petterson for direct comparison.本次录音采用AudioMoth设备录制，采样率为384千采样每秒（384ksps），采样深度16比特，增益设置为低增益模式。其麦克风采用3微米镀铝聚酯薄膜（3micron aluminised Mylar film）进行防护。录音地点为科利希思保护区（Colney Heath Conservation Area），坐标为51.78263, -0.271419，录制时间为2018年4月4日英国夏令时（BST）20:16。 这段时长4分钟的录音包含以下蝙蝠物种的回声定位信号：莱氏夜蝠（Nyctalus Leisleri，信号频率大于20kHz）、普通伏翼蝠（Pipistrellus pipistrellus，调频信号降至45kHz）、侏伏翼蝠（Pipistrellus pygmaeus，调频信号降至52kHz）以及道氏鼠耳蝠（Myotis daubentonii，宽频调频信号降至30kHz）。 第二份同地点的录音还包含一只大夜蝠（Noctule）和疑似塞洛蒂蝙蝠（Serotine）的回声定位信号。该PNG格式截图展示了同一次蝙蝠飞行的录音对比：分别为AudioMoth在地面以45度角录制的信号，以及Petterson M500-384手持设备在胸高位置录制的信号。 两份文件名为CHC18-1p_20180406_203333.wav与CHC18-1am2_20180406_203154.wav的录音为AudioMoth与Petterson设备同步录制的重叠录音，用于直接对比测试。