Sound, devoid of meaning, would not matter to us. It is the information sound conveys that helps the brain to understand its environment. Sound and its underlying meaning are always associated with time and space. There is no sound without spatial properties, and the brain always organizes this information within a temporal-spatial framework. This book is devoted to understanding the importance of meaning for spatial and related further aspects of hearing, including cross-modal inference. People, when exposed to acoustic stimuli, do not react directly to what they hear but rather to what they hear means to them. This semiotic maxim may not always apply, for instance, when the reactions are reflexive. But, where it does apply, it poses a major challenge to the builders of models of the auditory system. Take, for example, an auditory model that is meant to be implemented on a robotic agent for autonomous search-&-rescue actions. Or think of a system that can perform judgments on the sound quality of multimedia-reproduction systems. It becomes immediately clear that such a system needs * Cognitive capabilities, including substantial inherent knowledge * The ability to integrate information across different sensory modalities To realize these functions, the auditory system provides a pair of sensory organs, the two ears, and the means to perform adequate preprocessing of the signals provided by the ears. This is realized in the subcortical parts of the auditory system. In the title of a prior book, the term Binaural Listening is used to indicate a focus on sub-cortical functions. Psychoacoustics and auditory signal processing contribute substantially to this area. The preprocessed signals are then forwarded to the cortical parts of the auditory system where, among other things, recognition, classification, localization, scene analysis, assignment of meaning, quality assessment, and action planning take place. Also, information from different sensory modalities is integrated at this level. Between sub-cortical and cortical regions of the auditory system, numerous feedback loops exist that ultimately support the high complexity and plasticity of the auditory system. The current book concentrates on these cognitive functions. Instead of processing signals, processing symbols is now the predominant modeling task. Substantial contributions to the field draw upon the knowledge acquired by cognitive psychology. The keyword Binaural Understanding in the book title characterizes this shift. Both books, The Technology of Binaural Listening and the current one, have been stimulated and supported by AABBA, an open research group devoted to the development and application of models of binaural hearing. The current book is dedicated to technologies that help explain, facilitate, apply, and support various aspects of binaural understanding. It is organized into five parts, each containing three to six chapters in order to provide a comprehensive overview of this emerging area. Each chapter was thoroughly reviewed by at least two anonymous, external experts. The first part deals with the psychophysical and physiological effects of Forming and Interpreting Aural Objects as well as the underlying models. The fundamental concepts of reflexive and reflective auditory feedback are introduced. Mechanisms of binaural attention and attention switching are covered-as well as how auditory Gestalt rules facilitate binaural understanding. A general blackboard architecture is introduced as an example of how machines can learn to form and interpret aural objects to simulate human cognitive listening. The second part, Configuring and Understanding Aural Space, focuses on the human understanding of complex three-dimensional environments-covering the psychological and biological fundamentals of auditory space formation. This part further addresses the human mechanisms used to process information and interact in complex reverberant environments, such as concert halls and forests, and additionally examines how the auditory system can learn to understand and adapt to these environments. The third part is dedicated to Processing Cross-Modal Inference and highlights the fundamental human mechanisms used to integrate auditory cues with cues from other modalities to localize and form perceptual objects. This part also provides a general framework for understanding how complex multimodal scenes can be simulated and rendered. The fourth part, Evaluating Aural-scene Quality and Speech Understanding, focuses on the object-forming aspects of binaural listening and understanding. It addresses cognitive mechanisms involved in both the understanding of speech and the processing of nonverbal information such as Sound Quality and Quality-of- Experience. The aesthetic judgment of rooms is also discussed in this context. Models that simulate underlying human processes and performance are covered in addition to techniques for rendering virtual environments that can then be used to test these models. The fifth part deals with the Application of Cognitive Mechanisms to Audio Technology. It highlights how cognitive mechanisms can be utilized to create spatial auditory illusions using binaural and other 3D-audio technologies. Further, it covers how cognitive binaural technologies can be applied to improve human performance in auditory displays and to develop new auditory technologies for interactive robots. The book concludes with the application of cognitive binaural technologies to the next generation of hearing aids.

This book presents a novel method of grafting musical wind instruments by exchanging an instrument's standard mouthpiece with different tone generators. Using the concrete example of the soprano saxophone, it describes how, with six other tone generators, including brass, double reed, and free reed mechanisms, the saxophone can be extended to nearly every wind instrument category in the von Hornbostel and Sachs classification system. The book demonstrates how it is possible to play these instrument variations with high proficiency, and describes the method of hyper-specialization, including acoustical insights, conservatory training methods and the underlying philosophy. The latter is based on the cultural traditions of the different wind instrument prototypes and the Deep Listening philosophy of cultivating internal diversity, and approach that leads to a new level of wind instrument virtuosity that offers great timbral variety combined with the flexibility of a regular acoustic wind instrument.

Improvising Across Abilities: Pauline Oliveros and the Adaptive Use Musical Instrument (AUMI) brings together scholars, musicians, and family members of people with disabilities to  collectively recount years of personal experiences, research, and perspectives on the societal and community impact of inclusive musical improvisation. One of the lesser-known projects of composer, improviser, and humanitarian, Pauline Oliveros (1932–2016), the AUMI was designed as a liberating and affordable alternative to the constraints of instruments created only for normative bodies, thus opening a doorway for people of all ages, genders, abilities, races, and socioeconomic backgrounds to access artistic practice with others. More than a book about AUMI, this book is an invitation to readers to use AUMI in their own communities.  This book, which contains wisdom from many who have been affected by their work with the instrument and the people who use it, is a representation of how music and extemporized performance have touched the lives and minds of scholars and families alike. Not only has AUMI provided the opportunity to grow in listening to others who may speak differently (or not at all), but it has been used as an avenue for a diverse set of people to build friendships with others whom they may have never otherwise even glanced at in the street. By providing a space for every person who comes across AUMI to perform, listen, improvise, and collaborate, the continuing development of this instrument contributes to a world in which every person is heard, welcomed, and celebrated.

Improvising Across Abilities: Pauline Oliveros and the Adaptive Use Musical Instrument (AUMI) brings together scholars, musicians, and family members of people with disabilities to  collectively recount years of personal experiences, research, and perspectives on the societal and community impact of inclusive musical improvisation. One of the lesser-known projects of composer, improviser, and humanitarian, Pauline Oliveros (1932–2016), the AUMI was designed as a liberating and affordable alternative to the constraints of instruments created only for normative bodies, thus opening a doorway for people of all ages, genders, abilities, races, and socioeconomic backgrounds to access artistic practice with others. More than a book about AUMI, this book is an invitation to readers to use AUMI in their own communities.  This book, which contains wisdom from many who have been affected by their work with the instrument and the people who use it, is a representation of how music and extemporized performance have touched the lives and minds of scholars and families alike. Not only has AUMI provided the opportunity to grow in listening to others who may speak differently (or not at all), but it has been used as an avenue for a diverse set of people to build friendships with others whom they may have never otherwise even glanced at in the street. By providing a space for every person who comes across AUMI to perform, listen, improvise, and collaborate, the continuing development of this instrument contributes to a world in which every person is heard, welcomed, and celebrated.