Akustisk teknologi og lydteknik

Join revisionist author Joseph P. Farrell for a summary, revision, and update of his original Giza Death Star trilogy in this one-volume compendium of the argument, the physics, and the all-important ancient texts, from the Edfu Temple texts to the Lugal-e and the Enuma Elish that he believes may have made the Great Pyramid a tremendously powerful weapon of mass destruction. Those texts, Farrell argues, provide the clues to the powerful physics of longitudinal waves in the medium that only began to be unlocked centuries later by Sir Isaac Newton and his well-known studies of the Great Pyramid, and even later by Nikola Tesla's "electro-acoustic" experiments. Chapters and sections include A Remarkable, and Remarkably Strange, Structure; The Hypothesized Functions of the Great Pyramid's topological-Analogical Code of Ancient Texts; Greaves, Gravity, and Newton; Meta-Materials, Crystals, and Torsion; The Top Secret Cold War Soviet Pyramid Research, and much much more!

Als Quereinsteiger geht der Autor unvoreingenommen an die Raumakustik heran. Mit seinem bahnbrechenden Konzept, dem ReFlx®-System, macht er sich als Erfinder Zusammenhänge zunutze, die bisher nicht beachtet worden waren.Mit dieser vollständigen Überarbeitung seiner Publikation klarer und eindringlicher: Mit neuen Einsichten zur Raumkante, durch ein aktuelles Gutachten gestützt, mit umfangreicheren Hinweisen auf Wallace C. Sabine's 'Collected Papers on Acoutics' klarer begründet, zeigt der Autor nun besonders deutlich auf, was bisher in der Raumakustik falsch läuft.Mit thematischen Abschweifungen gelingt dem Autor eine abwechslungsreiche Lektüre mit interessanten Blicken über den Tellerrand hinweg und mit gelegentlichen metaphorischen Spitzen. - Umfangreiche rechtliche Abwägungen eröffnen eine neue Sicht auf DIN 18041. Sowohl aus der Praxis heraus, als auch durch die Sichtung der Fachliteratur macht der Autor für jedermann gut nachvollziehbar, wodurch sein Ansatz sich abhebt. Nicht ganz beiläufig bekommt man Sprache, das menschliche Ohr und Hörgeräte - als zentrale Themen der sprachlichen Kommunikation - in einmaliger Komplexität und Klarheit und durch neue Betrachtungsweisen verständlich dargelegt. Der Autor richtet sich an jedermann, an die Wissenschaft, an Studierende, an Musikschaffende, und unbedingt an Projektplanende in jeglichen Funktionen und Positionen. Forschende ruft er auf, die Akustik vorbehaltlos noch einmal ganz neu aufzurollen.

What is the difference between an echo and a reverberation? Where do you best place microphones for that perfect recording? How do you calculate the best note to whistle in a toilet? In this fascinating little book, musician Steve Marshall explores the field of acoustics. From decibels to dolphins, stereo to surround, this book will appeal to singers, musicians, architects, biologists, and anyone who ever wanted to know more about the wonderful world of sound. WOODEN BOOKS US EDITIONS. Small books, BIG ideas. Tiny but packed with information. "Stunning" NEW YORK TIMES. "Fascinating" FINANCIAL TIMES. "Beautiful" LONDON REVIEW OF BOOKS. "Rich and Artful" THE LANCET. "Genuinely mind-expanding" FORTEAN TIMES. "Excellent" NEW SCIENTIST.

A poet’s audio obsession, from collecting his earliest vinyl to his quest for the ideal vacuum tubes. A captivating book that “ingeniously mixes personal memoir with cultural history and offers us an indispensable guide for the search of acoustic truth” (Yunte Huang, author of Charlie Chan).Garrett Hongo’s passion for audio dates back to the Empire 398 turntable his father paired with a Dynakit tube amplifier in their modest tract home in Los Angeles in the early 1960s. But his adult quest begins in the CD-changer era, as he seeks out speakers and amps both powerful and refined enough to honor the top notes of the greatest opera sopranos. In recounting this search, he describes a journey of identity where meaning, fulfillment, and even liberation were often most available to him through music and its astonishingly varied delivery systems.   Hongo writes about the sound of surf being his first music as a kid in Hawai‘i, about doo-wop and soul reaching out to him while growing up among Black and Asian classmates in L.A., about Rilke and Joni Mitchell as the twin poets of his adolescence, and about feeling the pulse of John Coltrane’s jazz and the rhythmic chords of Billy Joel’s piano from his car radio while driving the freeways as a young man trying to become a poet.   Journeying further, he visits devoted collectors of decades-old audio gear as well as designers of the latest tube equipment, listens to sublime arias performed at La Scala, hears a ghostly lute at the grave of English Romantic poet John Keats in Rome, drinks in wisdom from blues musicians and a diversity of poetic elders while turning his ear toward the memory-rich strains of the music that has shaped him: Hawaiian steel guitar and canefield songs; Bach and the Band; Mingus, Puccini, and Duke Ellington. And in the decades-long process of perfecting his stereo setup, Hongo also discovers his own now-celebrated poetic voice.

Caused by downsizing of combustion engines, the torque fluctuation at the crankshaft induces torsional vibrations in the powertrain. Manual transmissions and dual clutch transmissions are particularly sensitive to gear-rattle noise. Gear-rattle noise arises from oscillations of loose parts with clearance, e.g. idler gears, synchronizer rings and gearshift sleeves. The aim of this research is the formulation of a gear oil for the application in a manual transmission to minimize gear rattling noise. Acoustic measurements on a gear-rattle noise test bench verify the noise reduction of the developed gear oils with commonly used low oil viscosity. An analysis of the transmission error proves that gear tooth impacts during rattling lead to elastic deformation of the meshing gear pairs. The main source for the intensity of gear-rattle noise is the additional presence of meshing impacts at the beginning of each gear pair meshing. Gear-rattle noise reduction can be achieved by avoiding meshing impacts, e.g. by minimizing the traction coefficient of the gear oil.

Object Lessons is a series of short, beautifully designed books about the hidden lives of ordinary things.Alarms are alarming. They wake us up, demand our attention and force us to attend to things we've preferred to ignore. But alarms also allow us to feel secure, to sleep and to retreat from alertness. Theytake over vigilance on our behalf. From the alarm clock and the air-raid siren to the doorbell and the phone alert, the history of alarms is also the history of work, security, technology and emotion. Alarm responds to culture's most urgent calls to attention by examining all kinds of alarms, from the restless presence of the alarm clock in modernist art to the siren - the sound of the police - in classic hip hop. More than just bells and whistles, alarms are objects that have defined sleeping and waking, safety and danger, and they have fundamentally shaped our understanding of the mind and its capacity for attention.Object Lessons is published in partnership with an essay series in The Atlantic.

Sound-Power Flow: A practitioner's handbook for sound intensity is a guide for practitioners and research scientists in different areas of acoustical science. There are three fundamental quantities in acoustics: sound pressure, sound particle velocity, and sound intensity. This book is about sound intensity and demonstrates the advantages and uses of acoustical sensing compared with other forms of sensing. It describes applications such as: measuring total sound power; directional hearing of humans and mammals; echolocation; measuring sound-power flow in ducts; and uses of non-contact, focused, high-frequency, pulse-echo ultrasonic probes.This book presents computational approaches using standard mathematics, and relates these to the measurement of sound-power flow in air and water. It also uses linear units rather than logarithmic units - this making computation in acoustics simpler and more accessible to advanced mathematics and computing. The book is based on work by the author and his associates at General Motors, the University of Mississippi, and Sonometrics.

During the nineteenth century, a remarkable scientific instrument known as a harmonograph revealed the beautiful patterns found in music. Harmonograph is an introduction to the evolution of simple harmonic theory, from the discoveries of Pythagoras to diatonic tuning and equal temperament. Beautiful drawings show the octave as a triangle, the fifth as a pentagram; diagrams show the principles of harmonics, overtones, and the monochord. Anthony Ashton examines the phenomenon of resonance in Chladni patterns, describes how to build a harmonograph of your own, and provides tables of world tuning systems. This inspiring book will appeal to musicians, mathematicians, designers, and artists alike.

This publication provides professional engineers, architects and construction managers with over 125 pages of technical guidance for control of noise and vibrations in buildings. Here is what is discussed: 1. FUNDAMENTALS OF ACOUSTICS AND VIBRATIONS, 2. EQUIPMENT VIBRATIONS AND SEISMIC LOADS, 3. NOISE CONTROL IN BUILDINGS, 4. SOUND LEVEL DATA FOR MECHANICAL/ELECTRICAL EQUIPMENT.

Chest sonography is an established procedure in the stepwise imaging diagnosis of pulmonary and pleural disease. It is the method of choice to distinguish between solid and liquid lesions and allows the investigator to make an unequivocal diagnosis without exposing the patient to costly and stressful procedures. This book presents the state of the art in chest investigation by means of ultrasonography. A number of excellent illustrations and the compact text provide concise and easy-to-assimilate information about the diagnostic procedure. Basic elements such as indications, investigation techniques and image artifacts are detailed in separate chapters.

This book addresses the problem of articulatory speech synthesis based on computed vocal tract geometries and the basic physics of sound production in it. Unlike conventional methods based on analysis/synthesis using the well-known source filter model, which assumes the independence of the excitation and filter, we treat the entire vocal apparatus as one mechanical system that produces sound by means of fluid dynamics. The vocal apparatus is represented as a three-dimensional time-varying mechanism and the sound propagation inside it is due to the non-planar propagation of acoustic waves through a viscous, compressible fluid described by the Navier-Stokes equations. We propose a combined minimum energy and minimum jerk criterion to compute the dynamics of the vocal tract during articulation. Theoretical error bounds and experimental results show that this method obtains a close match to the phonetic target positions while avoiding abrupt changes in the articulatory trajectory. The vocal folds are set into aerodynamic oscillation by the flow of air from the lungs. The modulated air stream then excites the moving vocal tract. This method shows strong evidence for source-filter interaction. Based on our results, we propose that the articulatory speech production model has the potential to synthesize speech and provide a compact parameterization of the speech signal that can be useful in a wide variety of speech signal processing problems. Table of Contents: Introduction / Literature Review / Estimation of Dynamic Articulatory Parameters / Construction of Articulatory Model Based on MRI Data / Vocal Fold Excitation Models / Experimental Results of Articulatory Synthesis / Conclusion