Bølgemekanik (vibration og akustik)

How sound leaves a fundamental imprint on who we are.Making sense of sound is one of the hardest jobs we ask our brains to do. In Of Sound Mind, Nina Kraus examines the partnership of sound and brain, showing for the first time that the processing of sound drives many of the brain's core functions. Our hearing is always on--we can't close our ears the way we close our eyes--and yet we can ignore sounds that are unimportant. We don't just hear; we engage with sounds. Kraus explores what goes on in our brains when we hear a word--or a chord, or a meow, or a screech. Our hearing brain, Kraus tells us, is vast. It interacts with what we know, with our emotions, with how we think, with our movements, and with our other senses. Auditory neurons make calculations at one-thousandth of a second; hearing is the speediest of our senses. Sound plays an unrecognized role in both healthy and hurting brains. Kraus explores the power of music for healing as well as the destructive power of noise on the nervous system. She traces what happens in the brain when we speak another language, have a language disorder, experience rhythm, listen to birdsong, or suffer a concussion. Kraus shows how our engagement with sound leaves a fundamental imprint on who we are. The sounds of our lives shape our brains, for better and for worse, and help us build the sonic world we live in.

Artificial Intelligence and Music Ecosystem highlights the opportunities and rewards associated with the application of AI in the creative arts.

Shows how nineteenth-century discoveries in acoustical science shaped Victorian literary representations of gender, sexuality, and intimacy.

Explore the harmonies of society with 'Psychoacoustic Sociology' by Dean Aamond, Ph.D. Unveil the intricate interplay of sound, culture, technology, and politics, transcending traditional disciplines to reveal the societal symphony through a psychoacoustic lens.

This thesis makes significant advances in the use of microspheres in optical traps as highly precise sensing platforms. While optically trapped microspheres have recently proven their dominance in aqueous and vacuum environments, achieving state-of-the-art measurements of miniscule forces and torques, their sensitivity to perturbations in air has remained relatively unexplored. This thesis shows that, by uniquely operating in air and measuring its thermally-fluctuating instantaneous velocity, an optically trapped microsphere is an ultra-sensitive probe of both mass and sound. The mass of the microsphere is determined with similar accuracy to competitive methods but in a fraction of the measurement time and all while maintaining thermal equilibrium, unlike alternative methods. As an acoustic transducer, the air-based microsphere is uniquely sensitive to the velocity of sound, as opposed to the pressure measured by a traditional microphone. By comparison to state-of-the-art commercially-available velocity and pressure sensors, including the world¿s smallest measurement microphone, the microsphere sensing modality is shown to be both accurate and to have superior sensitivity at high frequencies. Applications for such high-frequency acoustic sensing include dosage monitoring in proton therapy for cancer and event discrimination in bubble chamber searches for dark matter. In addition to reporting these scientific results, the thesis is pedagogically organized to present the relevant history, theory, and technology in a straightforward way.

This influential work of acoustics explores the theory behind weak shock waves and their propagation in various media. Written by a leading expert in the field, Keller's book is an indispensable resource for acousticians and researchers alike.This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it.This work is in the "public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work.Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.

This book, the first dedicated to the topic, provides a comprehensive treatment of forward stimulated Brillouin scattering (SBS) in standard optical fibers. SBS interactions between guided light and sound waves have drawn much attention for over fifty years, and optical fibers provide an excellent playground for the study of Brillouin scattering as they support guided modes of both wave types and provide long interaction lengths. This book is dedicated to forward SBS processes that are driven by co-propagating optical fields. The physics of forward SBS is explained in detail, starting from the fundamentals of interactions between guided optical and acoustic waves, with emphasis given to the acoustic modes that are stimulated in the processes. The realization of forward SBS in standard single-mode, polarization-maintaining and multi-core fibers is then discussed in depth. Innovative potential applications in sensors, monitoring of coating layers, lasers, and radio-frequency oscillators are presented. This book introduces the subject to graduate students in optics and applied physics, and it will be of interest to scientists working in fiber-optics, nonlinear optics and opto-mechanics.Provides the first treatment of forward stimulated Brillouin scattering (SBS) in book form;Reflects the dramatic recent increase in interest in forward SBS processes , driven in part by the promise of new fiber sensing concepts;Delivers a solid and comprehensive grounding in the physics of forward SBS along with detailed experimental set-ups, measurement protocols, and applications.

This updated, augmented third edition is aimed at hobbyists, students, engineers, and others who would like to learn more about the design and operation of electronic circuits used by guitarists. This book presents accessible qualitative and quantitative descriptions and analysis of a wide range of popular amplifier and effects circuits, along with basic design techniques allowing the reader to design their own circuits. The new edition further includes several additional circuits and topics suggested by readers of the previous editions, including noise gates, analog multipliers, the effects loop,  and additional tube amplifier design examples. 

The thunderous roar of a rocket launch, the earth-shaking vibrations, and the awe-inspiring spectacle of a spacecraft ascending into the heavens have captivated the human imagination for decades. Yet, behind the breathtaking visuals of rocket launches lies a complex acoustic environment that has been meticulously studied and understood, thanks to the pioneering work of scientists and engineers. "Acoustic Environment of Rocket Launches: From Eldred to Ranow" is a comprehensive exploration of this fascinating field, chronicling its evolution from the early days of space exploration to the present.The journey begins with Eldred, an era where the infancy of rocketry was met with rudimentary knowledge about the acoustics associated with launches. With each explosive liftoff, scientists like John Eldred began to comprehend the formidable acoustic challenges posed by the immense power and energy of rocket engines. The book traces the gradual development of measurement techniques, instrumentation, and computational models that allowed for a deeper understanding of the acoustic environment, paving the way for safer and more efficient launches.As we progress through the chapters, the narrative shifts to the Ranow era, reflecting the state-of-the-art knowledge and technologies that have emerged in recent years. Advanced simulation tools, cutting-edge materials, and innovative engineering solutions are now employed to mitigate the acoustic impacts on both the spacecraft and the surrounding environment. The book delves into the fascinating world of rocket acoustic testing facilities, showcasing the awe-inspiring equipment used to replicate launch conditions on Earth."Acoustic Environment of Rocket Launches: From Eldred to Ranow" not only offers a historical perspective but also delves into the future of rocket acoustics. It explores the ongoing research aimed at further enhancing our understanding of the acoustic challenges faced during launches and discusses potential breakthroughs that could revolutionize the field.

"For centuries, humans ignored sound in the "silent world" of the ocean, assuming that what we couldn't perceive, didn't exist. But we couldn't have been more wrong. Marine scientists now have the technology to record and study the complex interplay of the myriad sounds in the sea. Finally, we can trace how sounds travel with the currents, bounce from the seafloor and surface, bend with the temperature and even saltiness; how sounds help marine life survive; and how human noise can transform entire marine ecosystems. In Sing Like Fish, award-winning science journalist Amorina Kingdon synthesizes historical discoveries with the latest scientific research in a clear and compelling portrait of this sonic undersea world. From plainfin midshipman fish, whose swim-bladder drumming is loud enough to keep houseboat-dwellers awake, to the syntax of whalesong; from the deafening crackle of snapping shrimp, to the seismic resonance of underwater earthquakes and volcanoes; sound plays a vital role in feeding, mating, parenting, navigating, and warning-even in animals that we never suspected of acoustic ability. Meanwhile, we jump in our motorboats and cruise ships, oblivious to the impact below us. Our lifestyle is fueled by oil in growling tankers and furnished by goods that travel in massive container ships. Our seas echo with human-made sound, but we are just learning of the repercussions of anthropogenic noise on the marine world's delicate acoustic ecosystems-masking mating calls, chasing animals from their food, and even wounding creatures, from plankton to lobsters. With intimate and artful prose, Sing Like Fish tells a uniquely complete story of ocean animals' submerged sounds, envisions a quieter future, and offers a profound new understanding of the world below the surface"--

Quantum Computing Secrets : The Ultimate Human Guide to Quantum Universe Quantum computing is one of the most mind-bending and reality-warping technologies the world has ever seen. But most explanations of it are about as clear as the dingy basement a quantum computer has to live in. Don't you wish someone could just explain quantum in plain English, using examples like burritos and cats driving spaceships? Maybe with a few jokes and pop culture references sprinkled in for good measure? Look no further friends, because that's exactly what this book provides! Quantum Computing Secrets is the everyday person's guide to understanding this crazy technology that promises to transform our world. Inside, you'll learn: What exactly a qubit is, and why their wild quantum properties like superposition and entanglement enable insane computational powerHow quantum computers work at a basic level, from their intricate architecture to keeping them stable enough to churn through calculationsThe key players racing to build these machines, from Google and IBM to upstarts like IonQ and RigettiThe difference between a quantum computer and an old-fashioned calculator (hint: it's like comparing a portal to alternate dimensions versus an abacus)Applications for quantum across fields like chemistry, AI, cryptography and more - hello future!All explained using simple analogies, engaging real-world examples, clarifying diagrams, and even the occasional meme for good measure Most quantum books try to blind you with fancy equations and technical jargon. But why should only physics PhD students get to learn about the most important computer breakthrough of our times? Quantum Computing Secrets makes this esoteric topic accessible for everyday folks by breaking everything down into digestible bites. With wit, humor, and geeky passion, this book finally makes understanding quantum feel achievable for anyone motivated to try. Time to give that brain a quantum upgrade! Quantum Physics and Quantum Mechanics Supremacy Explained For Beginners And Their Impact on AI, Finance, Crypto... And Your Daily Life