a shape in the meadow
from
- Lat : 51.4821222471287
- Lon : -0.0481019983987920
- Accuracy : 4.0
to
- Lat : 51.4822458883604
- Lon : -0.0481476622823416
- Accuracy : 6.0
extensions
- Course : 313.85491943359
- Speed : 0.5253930687904360
audio
- Duration : 00:00:16
The bat detectors you can hear are heterodyne detectors. They isolate a sound frequency in the same way a radio receiver isolates a radio frequency. This allows you to 'tune in' to a specific frequency of ultrasound.
- Step back to : closed with pitch
- Step forward to : not nightly jumble
