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Acoustics of Small Rooms by Mendel Kleiner,Jiri Tichy Pdf
Much time is spent working out how to optimize the acoustics of large rooms, such as auditoria, but the acoustics of small rooms and environments can be just as vital. The expensive sound equipment of a recording studio or the stereo in a car or living room is likewise rendered useless if the acoustic environment is not right for them.Changes in wa
A comprehensive reference that covers all aspects of audio, with many practical, as well as theoretical, explanations, providing in-depth descriptions of how audio really works, using common sense explanations and mechanical analogies with minimal maths.
Mixing remains one of the most illusive arts of recording practice and can take a life time to master. Looking at practices, concepts, tools and mixing instruments the author provides a comprehensive insight to the art and science of mixing. Whether a hobbyist of professional this book covers basic concepts to advanced techniques as well as tips and tricks and is a vital read for anyone wanting to succeed in the field of mixing.
Routledge Diccionario Técnico Inglés by Routledge Pdf
This collection of essays and reviews represents the most significant and comprehensive writing on Shakespeare's A Comedy of Errors. Miola's edited work also features a comprehensive critical history, coupled with a full bibliography and photographs of major productions of the play from around the world. In the collection, there are five previously unpublished essays. The topics covered in these new essays are women in the play, the play's debt to contemporary theater, its critical and performance histories in Germany and Japan, the metrical variety of the play, and the distinctly modern perspective on the play as containing dark and disturbing elements. To compliment these new essays, the collection features significant scholarship and commentary on The Comedy of Errors that is published in obscure and difficulty accessible journals, newspapers, and other sources. This collection brings together these essays for the first time.
Auditorium Acoustics and Architectural Design by Michael Barron Pdf
Modern concert halls and opera houses are now very specialized buildings with special acoustical characteristics. This is an important resource for architects, engineers and auditorium technicians.
This book explains the nature of sound both as a physical phenomenon and as a sensation, how it travels through air and water, and how the hearing system evolved to convert these vibrations into sensations. Drawing on physics, biology, neuroscience, philosophy, literature, history, anecdote, and personal experience, "Now Hear This" is a wide-ranging exploration of the nature of sound and hearing that opens up a fascinating world of sounds from the mundane to the unusual and seeks above all to persuade the reader of the wisdom of John Cage’s advice that “Wherever we are what we hear is mostly noise. When we ignore it, it disturbs us. When we listen to it, we find it fascinating.”
Handbook of Sound Studio Construction: Rooms for Recording and Listening by Ken Pohlmann Pdf
Build first-class recording studios and listening spaces Design and build your own audiophile-grade recording and playback environments using proven, cost-effective plans and techniques. Handbook of Sound Studio Construction: Rooms for Recording and Listening explains practical acoustical properties and describes how to engineer acoustically sensitive spaces, including music recording studios, control rooms, voice studios, home project studios, A/V suites, media rooms, and surround-sound home theaters. Learn how to choose room dimensions, select building materials, construct your own custom treatments, maximize isolation, and generate and analyze response curves. This do-it-yourself guide incorporates decades of roomdesign experience and provides you with the practical knowledge to design and build your own acoustical spaces or improve existing spaces. Coverage includes: An introduction to room acoustics and acoustical design Reflecting, absorbing, and diffusing materials Room geometry, modes, and treatment Acoustic isolation, site selection, and HVAC design Wall, floor, and ceiling construction Window and door design considerations Reverberation times, early reflections, and psychoacoustics Objective and subjective room evaluation Plans and specifications for 10 recording and listening rooms
Physical and Applied Acoustics: An Introduction explores the mechanical-acoustical or acoustical-electrical analogies that are based on common theoretical relationships. This book is composed of 11 chapters that discuss the theory, experiment, and technological applications of physical and applied acoustics. The introductory chapters deal with the sound wave propagation in liquids and gases, as well as the statistical theory of room acoustics. These topics are followed by discussions on sound absorption in different medium; the concept of sound radiation pressure; directional characteristics of sound sources; measurement and calibration of acoustics; and the fundamental physical and psychological facts of acoustics. The subsequent chapters cover the use of electroacoustics for the transmission of speech and music. A chapter examines the production and detection of extremely high-frequency sound, called quantum acoustics. The concluding chapter highlights the interaction phenomena between sound and flow in a medium.
Signal Processing for Intelligent Sensor Systems with MATLAB, Second Edition by David C. Swanson Pdf
Building on the unique features that made the first edition a bestseller, this second edition includes additional solved problems and web access to the large collection of MATLABTM scripts that are highlighted throughout the text. The book offers expanded coverage of audio engineering, transducers, and sensor networking technology. It also includes new chapters on digital audio processing, as well as acoustics and vibrations transducers. The text addresses the use of meta-data architectures using XML and agent-based automated data mining and control. The numerous algorithms presented can be applied locally or network-based to solve complex detection problems.
Loudspeaker and Headphone Handbook by John Borwick Pdf
Written by a team of experts, the Loudspeaker and Headphone Handbook provides a detailed technical reference of all aspects of loudspeakers and headphones: from theory and construction of transducer drive units and enclosures, to such practical matters as construction, applications in rooms, public address, sound reinforcement, studio monitoring and musical instruments. Loudspeaker measurements and subjective evaluation are treated in equal detail and headphones are discussed comprehensively. This third edition takes account of recent significant advances in technology, including: · the latest computer-aided design systems · digital audio processing · new research procedures · the full range of loudspeakers · new user applications.
Introduction The concept of occupational voice disorders Philippe H. Dejonckere "People using their voice professionally are at risk for occupational voice diseases, and require specific prevention and treatment" was the topic focused on by the third Pan European Voice Conference, organized in August 1999 at Utrecht University. The present book includes the main tutorial lectures, with reviews of the most relevant research data and opinions regarding this specific area of concern. Occupational voice users include not only singers and actors, but also teachers, politicians, lawyers, clergymen, telephone operators, etc.(1). The pathogenesis of voice disorders in such patients can be primarily related to their occupation, and thus, after adequate differential diagnosis, these need to be recognized as true occupational diseases, in the same way as, for example, occupational hearing loss (2). A surfeit of information is available on the potential damage from exposure to excessive noise levels(3,4). Noise-induced hearing loss is generally recognized as a typical occupational disease. The relationship between dose and effect is clear, as is documented in publications by the International Organization of Standardization (ISO) (5). The dose combines intensity and duration, and therefore, the concept of dosimetry is of major importance. Also of importance is the definition of the safe limits for exposure to noise. However, factors regarding individual susceptibility to noise and the reversibility of early effects also have to be considered, as well as possible preventive indices of noise-induced hearing loss (6). In some - but not all - respects, noise-induced hearing loss may be considered as a useful model for occupational voice disorders. Epidemiology Titze (7) compared the percentage of the US working population and of the voice-clinic load for different occupation categories: for example, telephone marketers constitute only 0.78% of the total workforce, but 2.3% of the clinic load; teachers represent 4.2% of the US workforce and 20% of the voice-clinic load. Studies based on questionnaires have suggested that teachers and aerobic instructors are at high risk for disabilities from voice disorders, and that these health problems may have significant work-related and economic effects (8,9). For example, Russel et al.(10) investigated the prevalence of self-reported voice problems in teachers: 16% of teachers reported voice problems on the day of the survey, 20% during the current teaching year, and 19% at some time during their career. Roughly speaking, we can conclude from the several studies published during the 1990s that about 20% of teachers experience voice disorders (11). Voice dosimetry Objective measurement of vocal use and vocal load is necessary for the identification of activities and working conditions that are at risk. Voice dosimeters can provide information on the total vocalization time and sound pressure level over a whole working day, in a real life situation (12-14). Just as noise dosimeters define acceptable levels of noise exposure, voice dosimeters help to define the average acceptable limits for vocal load. Hyperphonation Repeated mechanical vibrations transmitted to the body tissues by engines or machines are known to be able of eliciting - in certain conditions - specific kinds of pathology, which are also considered to be occupational diseases (15,16). The vibration may involve the whole body (e.g., in a vehicle) or mainly the hand, wrist, elbow, or shoulder (hand-held power tools). There are standards in the field of occupational health that stipulate the acceptable limits for tissue acceleration values, depending on the frequency (17). Titze's calculations suggest that the risk of damage from tissue vibration is exceeded by occupational vocalists, such as telephone marketers and teachers (18). In the last few years, much new and important information has materialized on the dangers of 'hyperphonation', i.e., loud and prolonged phonation beyond the physiological range. Laboratory experiments on canine larynges, hyper-phonated in vivo under anesthesia, demonstrated obvious damage to vocal fold epithelia (19). The basement membrane shows early lesions and seems to be particularly sensitive (20). A clinical study by Mann et al.(21) in drill sergeants, demonstrated significant increases in vocal fold edema, erythema and edge irregularity, and decreases in vocal fold mucosal wave and amplitude of excursion, following a five-day training period Voice fatigue, relief and recovery According to Titze (18) , two different aspects must be considered: Muscle fatigue: the muscle chemistry needs to be reset for the following contractions. Epithelial cells may die and be shed, due to repeated traumata. New cells have to develop underneath. Collagen and elastin fibers may have separated from the structural matrix of the lamina propria, and have to be removed and replaced by the fibroblasts. Detached protein debris will be removed and re-used by the fibroblasts to make new protein fibers that will support the connective tissue structure. Therefore, minor destruction and repair is continuous. Can the regenerative processes keep up with the destructive process, and what are the physiological time constants in these processes? When there is damage to the joints, ligaments, tendons, or other connective tissue, the recovery time will be proportional to the amount of localized tissue injury that has occurred. If muscle fatigue is the only complaint, the recovery period required will probably be shorter. Hypothetical curves for tissue injury and the recovery period for human phonation have been suggested by Titze (18). Nevertheless, vocal fatigue is still difficult to identify in practical and clinical situations, and Buekers has questioned the clinical relevance of voice endurance tests (13,14). Environmental factors The relative humidity of the air affects vocal function: the most common subjective complaints of teachers with regard to their working environment are the dryness and dustiness of the air. Professional singers note that singing is more difficult in a dry environment: dry air puts an increased strain on the phonatory apparatus and raises the demands on its efficacious and appropriate use (22). The human voice is very sensitive to decreases in the relative humidity of inhaled air because, in experimental conditions, even after short provocation, a significant increase in perturbation measures has been found (23). Noise is also a very common and relatively well-known risk factor in the working environment of professional voice users. It has been observed that the sound level of the speaking voice significantly increases in ambient noise levels starting from 40 dB (A) (about 3 dB for each 10 dB increase in ambient noise), due to the Lombard effect (24,25). In kindergartens, for example, noise levels have been found to vary between 75 and 80 dB (A) (26,27). Effects of stress Mendoza and Carballo investigated the effects of experimentally induced stress on voice characteristics (28). In conditions of stress, induced by means of a stressful environment and cognitive workload tasks, they observed: 1. an increase in F o with respect to baseline; 2. a decrease in pitch perturbation quotient and in amplitude perturbation quotient; 3. a lower presence of turbulent noise in the spectral zone in which the existence of harmonic components is not expected (2800-5800 Hz), with respect to harmonic energy in the 70-4500 Hz range; 4. an increase in harmonic energy in the 1600-4500 Hz range with respect to harmonic energy in the 70-1600 Hz range. The increase in F o seems to be considered a universal indicator of stress and of cognitive workload, as is the lowering of F o perturbation. The response to a stressful stimulus demands a high level of activation, which in turn produces elevated ergotropic arousal that would cause an increase in the tension of the vocal muscles, producing a higher and more tense voice. Mattiske et al. (29) report that teachers seem to experience a significant degree of stress during their work (30) , and there is some research evidence that anxiety and stress are associated with the development of voice problems (31). Marks (32) compares teachers' voices with those of nurses, and finds that psychological stress is reported more frequently by teachers. There are indications that stress, psychological tension, personality, and other psychological factors, may play an important role in voicing problems among teachers (30,33,34). Vocal fold lesions Phonotrauma may result in typical vocal fold lesions, to be interpreted as a direct consequence of mechanical stress and/or as tissue reaction to that stress. Vocal fold nodules and polyps are classical examples (35,36) , but also contact ulcerations/ granulomas of the vocal processes (35,36,37) , if not induced by acid re-flux. Vocal fold hemorrhage is generally consecutive to acute phonotrauma (35). Depending on reversibility and context, microsurgery may become indicated as an important element of the treatment (38,39). Care and cure Patients with occupational voice disorders should benefit from specific medical and paramedical treatments, as well as from technical aids, with respect to their particular pathogenesis. There are major economical aspects at stake, and occupational rehabilitation plays an important role. In a few cases, compensation and professional re-orientation is necessary. Outcomes of the various possible treatment strategies have still to be investigated. However, prevention is still essential. There are indications that vocal hygiene education programs could improve the voice by reducing vocal abuse in daily life and by practising specific strategies to maintain classroom order and to reduce the use of the voice during teaching (40). Further research is needed to demonstrate the usefulness of prevention strategies on the incidence of actual voice disorders.
Interior Design Materials and Specifications by Lisa Godsey Pdf
This complete guide to the selection of materials for interiors has been updated to reflect the most recent materials on the market and contemporary awareness on industry movements like sustainability. Written from the viewpoint of the working designer, Interior Design Materials and Specifications, 4th Edition, describes each material's characteristics and teaches students how to evaluate, select, and specify materials, taking into account factors including code compliance, building standards, sustainability guidelines, human needs, and bidding processes. Students will learn how to communicate with suppliers and vendors to achieve the results they envision and how to avoid some of the pitfalls common to material selection and specification. New to this Edition: -Information on laminated materials has been dispersed and integrated into related materials chapters -Covers the most up-to-date information on smart and sustainable materials currently used in the industry -Includes new Case Studies that illustrate points made throughout chapters, based on real-life situations -New chapter "Looking Ahead" looks at material research for potential interior surfacing options STUDIO Features: -Study smarter with self quizzes featuring scored results and personalized study tips -Review concepts with flashcards of essential vocabulary Instructor Resources: -Instructor's Guide provides suggestions for planning the course and using the text in the classroom, supplemental assignments, and lecture notes -PowerPoint® presentations include images from the book and provide a framework for lecture and discussion
Promoting Healthy and Supportive Acoustic Environments: Going beyond the Quietness by Francesco Aletta,Jian Kang Pdf
This book gathers 14 original contributions published in an IJERPH Special Issue that deal with the perception of environmental sounds and how such sounds are likely to affect human quality of life and well-being and the experience of a place. The research focus over the years has been gradually shifting from treating sound simply as “noise” and something that cities should get rid of to a potential “resource” to promote and support community life in public spaces. Three main topics or “needs” to be addressed by researchers and practitioners emerged from this Special Issue: (1) the need to re-think “quietness” in cities as something that goes beyond the mere “pursuit of silence”, (2) the need to integrate additional contextual factors in the characterization and management of urban acoustic environments for public health, and (3) the need to consider the acoustic quality of indoor spaces as opposed to an outdoor-only perspective. The contributions collected in this book will hopefully trigger new questions and inform the agenda of future researchers and practitioners in the environmental acoustics domain.
Acoustics for Engineers by Jens Blauert,Ning Xiang Pdf
Blauert's and Xiang's "Acoustics for Engineers" provides the material for an introductory course in engineering acoustics for students with basic knowledge in mathematics. In the second, enlarged edition, the teaching aspects of the book have been substantially improved. Carefully selected examples illustrate the application of acoustic principles and problems are provided for training. "Acoustics for Engineers" is designed for extensive teaching at the university level. Under the guidance of an academic teacher it is sufficient as the sole textbook for the subject. Each chapter deals with a well defined topic and represents the material for a two-hour lecture. The 15 chapters alternate between more theoretical and more application-oriented concepts.
“Truth happens to an idea.” So wrote William James in 1907; and twenty-four years later John Dewey argued that artistic experience entailed a process of “doing and undergoing.” But what do these ideas have to do with music, or with research conducted in and through music—that is, with “artistic research”? In this collection of essays, fourteen very different authors respond with distinct and challenging perspectives. Some report on their own experiments and experiences; some offer probing analyses of noteworthy practices; some view historical continuities through the lens of pragmatism and artistic experiment. The resulting collection yields new insights into what musicians do, how they experiment, and what they experience—insights that arise not from doctrine, but from diverse voices seeking common ground in and through experimental discourse: artistic research in and of itself.