The overall goal of this project is to improve our understanding of beaked whale distribution and foraging behavior and to describe inter-specific differences. We are developing habitat models for multiple beaked whale species in the Southern California Bight using passive acoustic encounters. Data from line transect surveys and autonomous recorders are compared with dynamic and static oceanogr...

This study examined the measurement of the contralateral acoustic stapedius reflex in six-week-old infants and adults using wideband shifts in admittance and energy reflectance (YR). The reflex activator was bandpass noise from 2,500 to 11,000 Hz presented at a maximum spectrum level of 51 dB SPL measured in the ear canal. Reflexes were detected by calculating a cross-correlation between one-tw...

Lotta Haavisto. Objective evaluation of nasal dimensions in children with acoustic rhinometry. The Department of Otorhinolaryngology – Head and Neck Surgery, University of Turku, Turku, Finland. Annales Universitatis Turkuensis, Medica-Odontologica, Painosalama Oy 2011, Turku, Finland. aims: This study was carried out to investigate the usefulness of acoustic rhinometry in the evaluation of int...

abstract   a cystic acoustic neurinoma almost entirely consists of a cystic component and is a well recognized subtype of acoustic schwannoma. we report a case of a 40-year- old male patient who presented with clinical features of a left cerebello-pontine angle mass lesion and ct scan findings mimicking the diagnosis of an epidermoid cyst. however intraoperative and histopathological findings w...

This paper presents an analysis of the acoustic emissions emitted by an underway REMUS-100 autonomous underwater vehicle (AUV) that were obtained near Honolulu Harbor, HI using a fixed, bottom-mounted horizontal line array (HLA). Spectral analysis, beamforming, and cross-correlation facilitate identification of independent sources of noise originating from the AUV. Fusion of navigational record...

The heart of a speech recognition system is the acoustic model of sub-word units (e.g., phonemes). In this work we discuss refinements of the stochastic segment model, an alternative to hidden Markov models for representation of the acoustic variability of phonemes. We concentrate on mechanisms for better modelling time correlation of features across an entire segment. Results are presented for...

Interaural Time Difference (ITD) is used in the mammalian auditory system to compute the angle of incidence of an acoustic sound-source on the horizontal plane. This paper describes how ITD can be incorporated into a robotic acoustic tracking system to enable the robot to locate and orient towards sound-sources within its environment. We describe a system compiled using cross-correlation and au...

The baryonic acoustic signature in the large-scale clustering pattern of galaxies has been detected in the two-point correlation function. Its precise spatial scale has been forwarded as a rigid-rod ruler test for the space-time geometry, and hence as a probe for tracking the evolution of dark energy. Percent-level shifts in the measured position can bias such a test and erode its power to cons...

A study of lhe relations between the perceptive similarity of voices and physical measures of the speech signal has been carried out. The goal of this study was to identify a set of acoustic parameters which contribute mosl to the voice discrimination process. We worked on a corpus of Iogatoms CVCV. Ten male speakers uttering nine items were considered and a single sample of each item was used....

Permeable feed zones in geothermal wells are commonly identified using well profiles of temperature, pressure and fluid velocity measured at different injection rates during well completion testing and heat-up. While this data gives some indication of the depth and relative strength of the feed zones it does not give any information on the nature of the permeability in those zones, be it primar...