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Physical Approach to Engineering Acoustics
This textbook presents the fundamentals of engineering acoustics and examines in depth concepts within the domain that apply to reducing noise, measuring noise, and designing microphones and loudspeakers. The book particularly emphasizes the physical principles used in designing miniature microphones. These devices are used in billions of electronic products, most visibly, cell phones and hearing aids, and enable countless other applications. Distinct from earlier books on this topic that take the view of the electrical engineer analyzing mechanical systems using electric circuit analogies. This text uses Newtonian mechanics as a more appropriate paradigm for analyzing these mechanical systems and in so doing provides a more direct method of modeling. Written at a level appropriate for upper-division undergraduate courses, and enhanced with end-of-chapter problems and MatLab routines, the book is ideal as a core text for students interested in engineering acoustics in ME, EE, and physics programs, as well as a reference for engineers and technicians working in the huge global industry of miniature microphone design.
The Shocking Secret of the Electric Eel... and More!
Readers tag along with scientists as they uncover intriguing adaptations that help animals survive in their environments. This colorful book explains the electric eels hunting tactics and an unexpected defense strategy, why some fish sleep in mucous cocoons, how jumping spiders hear from across a room, what the shape of a European eels head reveals about its diet, and why midshipman fish sing only at night. Based largely on primary sources, including interviews with the scientists, illustrated with original research and stock photographs, and complemented with a hands-on activity, this volume opens a window into the world of scientists as they uncover animal secrets that vividly complement basic biological principles.
Scientific and Technical Aerospace Reports
Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
Federal Register
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