During acoustic recording, the SM5 can record audio up to half the acoustic sample rate in frequency.
Options
- 8 kHz
- 12 kHz
- 16 kHz
- 22.05 kHz
- 24 kHz (default)
- 32 kHz
- 44.1 kHz
- 48 kHz
- 88.2 kHz
- 96 kHz
Both acoustic recording channels must use the same sample rate.
Choosing a Sample Rate
Higher sample rates allow you to record higher-frequency sounds (subject to the sensitivity of the microphone), but they also take up more storage space. You should always choose a sample rate that is at least two times the highest frequency you wish to record.
Tip: For species with very low-frequency
vocalizations, you can use very low sample rates to reduce data storage needs.
However, using a more standard sample rate may allow you to reuse the data for later
projects more easily.
Common Sample Rates
The following are suggested starting points for common use cases. If you are following a standard survey protocol, always refer to that protocol for any required settings.
- Songbirds
- A sample rate of 24 kHz may be used to record bird calls with sufficient quality to identify many species. Some survey protocols may recommend or require higher sample rates, such as 44.1 kHz or 48 kHz, for greater audio quality and frequency range.
- Soundscapes and Acoustic Indices
- A sample rate of 44.1 kHz or 48 kHz is typical, as these allow you to record audio up to 20 kHz, which is the upper frequency limit of typical human hearing. Some acoustic indices or analysis software may require specific sample rates for full compatibility and accurate measurements.