374
w.w.L. Au
30 kHz
~
-
odB 40·
~---+---+---r--i O·
~
OkHZ
65 ..
,
,
o
150/..15
22 kHz
58 ..
~
-10·
38 kHz
~
115 kHz
72 ..
~
40·
~
22kHZ
-+---1---+---'«>0·.. · - - - ,
,
o
150/..15
>
40kHz
-JVlL
FIGURE 9.5. The transmission beam pattern of a Tursiops truncatus in the vertical
and horizontal planes. The waveform of a click simultaneously measured by five
hydrophones are also shown. The values above the waveforms are the peak frequencies of the signal. Multiple values are used to indicate spectra with multiple
peaks listed in descending order according to their relative amplitude. (From Au
1993.)
w.w.L. Au
30 kHz
~
-
odB 40·
~---+---+---r--i O·
~
OkHZ
65 ..
,
,
o
150/..15
22 kHz
58 ..
~
-10·
38 kHz
~
115 kHz
72 ..
~
40·
~
22kHZ
-+---1---+---'«>0·.. · - - - ,
,
o
150/..15
>
40kHz
-JVlL
FIGURE 9.5. The transmission beam pattern of a Tursiops truncatus in the vertical
and horizontal planes. The waveform of a click simultaneously measured by five
hydrophones are also shown. The values above the waveforms are the peak frequencies of the signal. Multiple values are used to indicate spectra with multiple
peaks listed in descending order according to their relative amplitude. (From Au
1993.)