A Tutorial on Auditory Attention Identification Methods

Auditory attention identification methods attempt to identify the sound source of a listener's interest by analyzing measurements of electrophysiological data. We present a tutorial on the numerous techniques that have been developed in recent decades, and we present an overview of current trends in multivariate correlation-based and model-based learning frameworks. The focus is on the use of linear relations between electrophysiological and audio data. The way in which these relations are computed differs. For example, canonical correlation analysis (CCA) finds a linear subset of electrophysiological data that best correlates to audio data and a similar subset of audio data that best correlates to electrophysiological data. Model-based (encoding and decoding) approaches focus on either of these two sets. We investigate the similarities and differences between these linear model philosophies. We focus on (1) correlation-based approaches (CCA), (2) encoding/decoding models based on dense estimation, and (3) (adaptive) encoding/decoding models based on sparse estimation. The specific focus is on sparsity-driven adaptive encoding models and comparing the methodology in state-of-the-art models found in the auditory literature. Furthermore, we outline the main signal processing pipeline for how to identify the attended sound source in a cocktail party environment from the raw electrophysiological data with all the necessary steps, complemented with the necessary MATLAB code and the relevant references for each step. Our main aim is to compare the methodology of the available methods, and provide numerical illustrations to some of them to get a feeling for their potential. A thorough performance comparison is outside the scope of this tutorial

The Death Knell For the Death Penalty and the Significance of Global Realism to its Abolition from Glossip v. Gross to Brumfield v. Cain

Objectives For the last decade a host of different projects have been launched to allow persons who are concerned about their hearing status to quickly and at a low cost test their hearing ability. Most often, this is carried out without collecting complementary information that could be correlated with hearing impairment. In this two-part study we first, present the development and validation of a novel Internet-based hearing test, and second, report on the associations between this test and phonological representation, quality of life and self-reported hearing difficulties. Design Cross-sectional study. Setting An opportunity sample of participants was recruited at the Stockholm central station for the first study. All parts of the second study were conducted via the Internet, with testing and self-report forms adapted for online use. Participants The first part of the study was carried out in direct contact with the participants, and participants from the second study were recruited by means of advertisements in newspapers and on webpages. The only exclusion criterion was that participants had to be over 18 years old. Most participants were between 60 and 69 years old. There were almost an equal number of men and women (total n=316). Outcome measures 48 participants failed the Internet-based hearing screening test. The group failing the test reported more problems on the Amsterdam Inventory of Auditory Disability. In addition, they were found to have diminished phonological representational skills. However, no difference in quality of life was found. Conclusions Almost one in five participants was in need of contacting their local hearing clinic. This group had more complaints regarding tinnitus and hyperacusis, rated their own hearing as worse than those who passed, and had a poorer capability of generating accurate phonological representations. This study suggests that it is feasible to screen for hearing status online, and obtain valid data

The Development and Failure of Social Norms in Second Life

This Note analyzes the development and efficacy of social norms in maximizing the welfare of participants in the virtual community of Second Life. Although some of these norms developed appropriately in response to the objectives and purposes of this virtual world, Second Life is so thoroughly steeped in conditions that have impeded the development of successful social norms in other communities that any system of social norms in Second Life will ultimately fail. Because social norms will likely,fail to successfully maximize resident welfare, regulatory schemes imposed both by the operators of the virtual world and by real-world governing institutions are needed to enhance the functioning of this particular alternative reality inhabited by millions

Importance of “Process Evaluation” in Audiological Rehabilitation: Examples from Studies on Hearing Impairment

The main focus of this paper is to discuss the importance of “evaluating the process of change” (i.e., process evaluation) in people with disability by studying their lived experiences. Detailed discussion is made about “why and how to investigate the process of change in people with disability?” and some specific examples are provided from studies on patient journey of persons with hearing impairment (PHI) and their communication partners (CPs). In addition, methodological aspects in process evaluation are discussed in relation to various metatheoretical perspectives. The discussion has been supplemented with relevant literature. The healthcare practice and disability research in general are dominated by the use of outcome measures. Even though the values of outcome measures are not questioned, there seems to be a little focus on understanding the process of change over time in relation to health and disability. We suggest that the process evaluation has an additional temporal dimension and has applications in both clinical practice and research in relation to health and disability

A Simple Method for Determination of Chloropyramine in Tablets

A simple gas chromatography method with mass detection (GC-MS) for the determination of chloropyramine active pharmaceutical ingredient (API) in tablets was developed. Chromatographic separation was achieved on a fused silica ZB-5 capillary column (30 m x 0.25 mm i.d. x 0.25 μm film thickness). Acquisition was performed in selected ion monitoring mode (SIM) with target ion (58 m/z) and reference ions (71 m/z, 125 m/z). The method was validated in respect system suitability, specificity, linearity, range accuracy and precision, limit of detection (LOD), limit of quantification (LOQ), specificity, robustness and stability. The advantages of this method include simple sample treatment, short elution time (less than 15 min) and short analysis time (less than 25 min). The proposed method could be applicable for routine analysis in pharmaceutical analytical laboratories. Keywords Active pharmaceutical ingredient, Chloropyramine, Gas chromatography-mass detection, Tablet

Multimodal sensing for Subvocal speech recognition for Silent speech interfaces in future AR glasses

Subvocal speech occurs while someone reads a book or talks to oneself or murmurs. Unlike whispering where closer ones can hear speech, such voices cannot be heard by others nearby. Subvocal speech recognition is usually done with electromyograms (EMG) that are unique for each speaker. EMG electrodes are placed on the neck and facial muscles to record muscle activations while making subvocal speech. In addition, EEG electrodes can also be placed on the head to capture electrical signals generated by the brain when subvocal speech has been made. These electrical signals can then be interpreted using signal processing techniques for inferring speech