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. Author manuscript; available in PMC: 2012 Jun 27.
Published in final edited form as: J Acoust Soc Am. 2003 Aug;114(2):1120–1131. doi: 10.1121/1.1589754

FIG. 3.

FIG. 3

A. Schematic of signal processing hardware. B. Filter characteristics of the bandpass filter used. The x-axis shows the frequency, while the y axis shows the normalised response. The vertical bars correspond to the 3dB (half-power) points ie. the start and stop frequency. Examples of band-pass signal and envelope extraction may be seen in Fig. 4 A and B.