Network platform for sound information analyzis

A new technique of audio information processing for automatic analysis and classification of records, including speech, has been proposed. The technique is based on information representation in the form of associative semantic (cognitive) network structure and deals with amplitude and frequency layers both

Network platform for sound information analyzis

A new technique of audio information processing for automatic analysis and classification of records, including speech, has been proposed. The technique is based on information representation in the form of associative semantic (cognitive) network structure and deals with amplitude and frequency layers both

Towards Understanding the Compression of Sound Information

The purpose of this thesis is to explore data compression, specifically as it relates to sound information. Data transfer is an important part of the current technology driven lifestyle and compressed data means faster transmission. This thesis will explore how compression can be applied to sound while considering often overlooked factors, such as the way the sense of human hearing works to interpret sounds. An example of Huffman compression follows the general discussion of the compression of sound information

A point process framework for modeling electrical stimulation of the auditory nerve

Model-based studies of auditory nerve responses to electrical stimulation can provide insight into the functioning of cochlear implants. Ideally, these studies can identify limitations in sound processing strategies and lead to improved methods for providing sound information to cochlear implant users. To accomplish this, models must accurately describe auditory nerve spiking while avoiding excessive complexity that would preclude large-scale simulations of populations of auditory nerve fibers and obscure insight into the mechanisms that influence neural encoding of sound information. In this spirit, we develop a point process model of the auditory nerve that provides a compact and accurate description of neural responses to electric stimulation. Inspired by the framework of generalized linear models, the proposed model consists of a cascade of linear and nonlinear stages. We show how each of these stages can be associated with biophysical mechanisms and related to models of neuronal dynamics. Moreover, we derive a semi-analytical procedure that uniquely determines each parameter in the model on the basis of fundamental statistics from recordings of single fiber responses to electric stimulation, including threshold, relative spread, jitter, and chronaxie. The model also accounts for refractory and summation effects that influence the responses of auditory nerve fibers to high pulse rate stimulation. Throughout, we compare model predictions to published physiological data and explain differences in auditory nerve responses to high and low pulse rate stimulation. We close by performing an ideal observer analysis of simulated spike trains in response to sinusoidally amplitude modulated stimuli and find that carrier pulse rate does not affect modulation detection thresholds.Comment: 1 title page, 27 manuscript pages, 14 figures, 1 table, 1 appendi

Integrated water resources management and sound information system - Sri Lankan experience

Integrated water resources management is the core of the management strategy of national water resources, for which the concept of multi sectoral planning of river basin has to be introduced. In order to meet this objective one of the basic and most important requirement is a sound information base of the resources and analytical tools to support decision making process. In Sri Lanka, quite similar to our neighboring countries in the region, water resources planning, development and management decisions were made spanning for several decades on the basis of achieving self sufficiency in the staple food, rice. However during recent times, while developing lands for agriculture emphasis was also laid on hydro power development. Once the infrastructure for the water resources development is established, it is also important to realize the sustainability of these assets due to ageing and deterioration. Therefore there is an urgent necessity for the formulation of a national plan to ensure the safety of dams by establishing a mechanism for periodic monitoring and taking timely action for necessary repairs

NAVIS: Neuromorphic Auditory VISualizer Tool

This software presents diverse utilities to perform the first post-processing layer taking the neuromorphic auditory sensors (NAS) information. The used NAS implements in FPGA a cascade filters architecture, imitating the behavior of the basilar membrane and inner hair cells and working with the sound information decomposed into its frequency components as spike streams. The well-known neuromorphic hardware interface Address-Event-Representation (AER) is used to propagate auditory information out of the NAS, emulating the auditory vestibular nerve. Using the information packetized into aedat files, which are generated through the jAER software plus an AER to USB computer interface, NAVIS implements a set of graphs that allows to represent the auditory information as cochleograms, histograms, sonograms, etc. It can also split the auditory information into different sets depending on the activity level of the spike streams. The main contribution of this software tool is that it allows complex audio post-processing treatments and representations, which is a novelty for spike-based systems in the neuromorphic community and it will help neuromorphic engineers to build sets for training spiking neural networks (SNN).Ministerio de Economía y Competitividad TEC2012-37868-C04-0

FORENSIC SOCIAL WORK: INTERVIEWING SEXUALLY ABUSED CHILDREN

In the United States, each year, there are at least one million cases of child sexual abuse and even more cases that were not reported. For the cases that are reported, the child will meet with a social worker or other professional for a forensic interview. The goal of a forensic interview is to explore claims or suspicions of sexual abuse. The sexually abused children who participate in these interviews have already been traumatized and may not want to disclose. Yet the job of the interviewer is to elicit forensically sound information and details about the events from the children that can be used in court. This must be done without traumatizing the child more and without eliciting false allegations. This paper discusses what factors prevent the child from disclosing. This paper also explores the different protocols and tools the interviewer can implement to elicit more forensically sound information