Night-Only Recording Mode
The night only mode is designed for efficient deployment. This recording mode will turn the detector on 30 minutes before sunset and off 30 minutes after sunrise. This requires a GPS fix.
Off Dots
Zero crossing dots which are hidden (either manually or by a filter)
Onmidirectional microphone
Each microphone has an area of detection, the shape of this area relates to the directionality of the microphone. An omnidirectional microphone has a, more or less, spherical area of detection, whilst a directional microphone has a lobed area of detection in front of the microphone. For more information on which microphone is best for […]
OPS
Octaves per second
Oscillogram
A visual representation of a sounds intensity (y axis) over time (x axis)
Pass
The series of pulses which are contained in a file, typically from one bat passing the microphone
Passive Survey
A passive survey is where you place detectors unattended in the field to record. (advantages and disadvantages chart)
Peak frequency
The frequency at which the call reaches maximum amplitude (the frequency of the loudest part of the call). This may be different to the characterstic frequency, as peak frequency is calculated from the full spectrum data, while characteristic frequency is a zero crossing metric.
PMC
The proportion of maximum frequency to characteristic frequency. PMC = 100 x (FMax – Fc)/Fc
Pulse
A single echolocation pulse emitted from a bat