San Francisco State University Physics and Astronomy
SFSU Pacific Oceanography
SFSU Private Area. WARNING: Material on this
page is work
in progress; results and conclusions may change without notice.
Least-Squares Fit to a Blue-Whale "B" Call
Figure 1. A 40-second-long blue-whale call. The signal
is from only hydrophone 4 (100 m above the sea floor), band-pass-
filtered with a band of 12 to 18 Hz. The red line shows the envelope,
calculated by averaging the rectified signal.