Beaked Whale Hearing and Noise Impact Models
Final rept. 1 Jun 2005-20 Jun 2006
WOODS HOLE OCEANOGRAPHIC INSTITUTION MA
Pagination or Media Count:
This project capitalized on and extended data, methodologies, and partnerships formed under the ONR funded Effect of Sound in the Marine Environment ESME. The work comprised two years of collaborative effort focusing on sophistication and refinement of the baseline auditory model developed previously by these team members under ESME and employed the same model architecture and organizational structure that proved successful in the ESME project. The impact modeling effort developed a modular approach paralleling that of the ESME projects in order to permit compatibility with the on-going ESME effort as it develops. The specific objective of this project was to develop biophysically based models of the acoustic power flow from the water, through the tissues of the head and middle ear, into the cochlea, and ultimately to the sensory receptor cells hair cells. These models allow us to estimate audiograms for multiple odontocete species from anatomical and mechanical measurements and to predict the excitation pattern within individual cochlea for a range of acoustic inputs as well as modeling stresses and strains on key cochlear tissues from over-stimulation.
- Anatomy and Physiology