Methods - Soundscape Ecology: Principles, Patterns, Methods and Applications - page 230

Fig. 9.6 A sinusoidal curve that represents the continuous analog waveform sampled at a
Δt interval: every sampled point represents the digital conversion of the signal

Fig. 9.7 Aliasing is the result of a poor sample rate of a sinusoidal curve ( a ). ( b ) The reconstruc-
tion of a digitalized curve that is not correspondent with the original analog curve. In this scheme
the sampling in ( b ) has to be nine times larger (in Hz) than the original

SR
2

f max ¼

where:

f max ¼ Nyquist limit frequency (Hz)

SR ¼ sampling rate (samples/s)

So if the digital sampling rate (SR) is 44.1 kHz, the signal is digitized to the
frequency of 22.05 kHz.
The precision at which the analog instantaneous amplitude is converted into a
digital format depends on the sample size or number of bits (bit depth) utilized in