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Vibration and noise are two interrelated terms in the field of
mechanical engineering. Vibration is caused by unbalanced inertial
forces and moments whereas noise is the result of such vibrations.
Noisy machines have always been a matter of concern. Lesser
vibration ensures manufacturing to closer tolerances, lesser wear
and tear, and longer fatigue life. Hence, a quieter machine is more
cost-effective in the long run. It is now well understood that a
quieter machine is in every way a better machine.This book deals
with such industrial and automotive noise and vibration, their
measurement and control. This textbook stresses on physical
concepts and the application thereof to practical problems. The
author's four decades of experience in teaching, research and
industrial consultancy is reflected in the choice of the solved
examples and unsolved problems.The book targets senior
undergraduate students in mechanical engineering as well as
designers of industrial machinery and layouts. It can readily be
used for self-study by practicing designers and engineers.
Fully updated second edition of the premier reference book on
muffler and lined duct acoustical performance Engine exhaust noise
pollutes the street environment and ventilation fan noise enters
dwellings along with fresh air. People have become conscious of
their working environment. Governments of most countries have
responded to popular demand with mandatory restrictions on sound
emitted by automotive engines, and a thorough knowledge of
acoustics of ducts and mufflers is needed for the design of
efficient muffler configurations. This fully updated Second Edition
of Acoustics of Ducts and Mufflers deals with propagation,
reflection and dissipation/absorption of sound along
ducts/pipes/tubes, area discontinuities, perforated elements and
absorptive linings that constitute the present-day mufflers and
silencers designed to control noise of exhaust and intake systems
of automotive engines, diesel-generator sets, compressors and HVAC
systems. It includes equations, figures, tables, references, and
solved examples and unsolved exercises with answers, so it can be
used as a text book as well as a reference book. It also offers a
complete presentation and analysis of the major topics in sound
suppression and noise control for the analysis and design of
acoustical mufflers, air conditioning and ventilation duct work.
Both the fundamentals and the latest technology are discussed, with
an emphasis on applications. Deals with reactive mufflers,
dissipative silencers, the frequency-domain approach, and the
time-domain approach. * Fully updated second edition of the premier
reference book on muffler and lined duct acoustical performance, in
one complete volume * Presents original new research on topics
including baffle silencers and louvers, 3D analytical techniques,
and flow-acoustic analysis of multiply-connected perforated-element
mufflers * Includes a general design procedure to help muffler
designers in the automotive industry, exhaust noise being a major
component of automobile and traffic noise pollution * Written by an
expert with four decades experience in teaching to graduate
students, publishing extensively in reputed international journals,
and consulting with industry for noise control as well as designing
for quietness
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