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Description:
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Recent advances in technology permitted the first simultaneous digital recording
of intranarial pressure and on -axis acoustic data from bottlenose dolphins during a
biosonar target recognition task . Analysis of pressurization events in the intranarial
space quantifies and supports earlier work , confirming that intranarial pressure
is increased when whistle vocalizations are emitted . The results show complex relationships
between various properties of the biosonar click to the intranarial pressure
difference at the time it was generated . The intranarial pressure that drives the production
of clicks is not the primary determinant of many of the acoustic properties
of those clicks . A simple piston -cylinder physical model coupled with a sound production
model of clicks produced at the monkey -lips /dorsal bursae complex yields an
estimate of mechanical work for individual pressurization events . Individual pressurization
events are typically associated with a single click train . Mechanical work for
an average pressurization event is estimated at 10 Joules . |