Table 1 Accelerometer transmitters are distinguished from loggers by a few important features that should be considered by analysts in the study design phase
From: Acoustic accelerometer transmitters and their growing relevance to aquatic science
Feature | Accelerometer loggers | Accelerometer transmitters |
|---|---|---|
Data product | Acceleration in units of g | Data summary, RMS or ODBA or range of values |
Data recovery | Stored onboard the device | Transmitted to a receiver |
Sampling rate | Typically 5–300 Hz | Typically 5–12.5 Hz |
Sampling window | None, all recordings are logged and time-stamped | User specified |
Transmission interval | None | User specified (usually 30–120 s), but must be greater than sampling window |
Axiality | 2 or 3 axes | 2 or 3 axes |
Static acceleration | Integrated in readings | Filtered out onboard the device |
Device attachment | Usually mounted externally | Often implanted internally |
Recovery of device | Recapture animal or use timed release mechanism | No recovery necessary |
Usage | Typically rechargeable and reusable | Single use |
Common auxiliary sensors | Temperature, depth, magnetic field | Temperature, depth |