Deuteron’s audio logger AL2 is made for recording sounds that animals hear, and sounds that animals make. Although it does not record neural signals, it is a member of Deuteron’s family of loggers for neuroscience experiments in freely moving animals. It is operated with the same radio transceivers as the neural loggers. and is operated with the same software. It is not much bigger than the MicroSD memory card that it holds and weighs about 1 gram. It can record audible and ultrasonic sounds, and has a frequency response that extends to 80kHz. The sampling rate is switchable between 50kHz, 100kHz and 200kHz. It can record sounds from either its on-board microphone or an external microphone or vibration transducer.
Audio Logger AL2 Specifications
| Sampling rates | 50kHz, 100kHz or 200kHz |
| Upper frequency limit | Customizable, can be switched between 3 settings |
| Lower frequency limit | Customizable, can be switched between 2 settings |
| Resolution | 16 bit |
| Amplification control | Amplification ratio of 1,2,4 or 8 |
| High frequency limit range | Up to 80kHz |
| Mass | 1g |
| Battery requirement | Lithium polymer single cell |
| Recording time | 3 hours for a 2 gram battery |
| Recorded data format | Uncompressed raw data |
| Dimensions | 19.5mm x 14.5mm |
This logger is best for experiments where animal sounds, but not neural signals, need to be recorded. If you want to record both sounds and neural signals at the same time, it is much better to use a neural logger that also records sounds. This is possible with MouseLog-16C loggers and the SpikeLog-64 single board logger.