My deployment times and recording durations are both modest, which mean that storage and battery life aren't an issue. If I want to record calls in the 2-8 kHz range, will I get the best results by setting the sample rate to 16 (the Nyquist rate for my target) or setting it much higher (for example the default of 48) and then filtering the recording in post?
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If you want a better signal-to-noise ratio, lower the sample rate. This holds true whether you record at a slower rate on the device or apply filters and downsamples after the fact. basketball legends
The AudioMoth does not have an anti-aliasing filter so you need to select a sample rate at least twice the maximum frequency in the environment - not just the maximum frequency of your target signal. doodle baseball
Be aware that there is no anti-aliasing filter in the AudioMoth so you need to select a sample rate at least twice the maximum frequency in the environment - not just the maximum frequency of your target signal.
Hi Rupert, In general, the lower the sample rate, the better the signal to noise ratio. However, this applies whether you record at a slower sample rate on the device itself, or filter and downsample the recordings in post-processing. So if you have the SD card and battery capacity, recording at a higher sample rate and filtering/downsampling in post-processing will give you the most flexibility. Alex