Page 7 - Spring 2006

Acoustics Today
A Publication of the Acoustical Society of America
Volume 2, Issue 2 April 2006
Cover: Studies of the atmosphere in the second half of the 19th century led to a revolution in the understanding of sound. Aeronauts in balloons measured temperature and wind variations while sci- entists on the ground reasoned that these variations would cause the path of a sound wave to curve. The science of the lower atmosphere led to a better understanding of sound; this new understanding of the behavior of sound then led to advances in the science of the stratosphere and beyond. (Adapted from Glaisher, Travels in the Air, 1871.)
6 The Vice President’s View: Donna L. Neff Departments: 39 ECHOES
Articles:
7 Refraction of Sound in the Atmosphere—Thomas B. Gabrielson
The latter half of the 19th century was a watershed for understanding the behavior of sound in the atmosphere; this understanding forged an enduring relationship between acoustics and atmospheric science.
18 Progress in Lithotripsy Research—Michael R. Bailey, James A. McAteer, Yuri A. Pishchalnikov, Mark F. Hamilton, and Tim Colonius
Fundamental acoustics research is improving clinical treatment of kidney stones.
30 Auditory Compression and Hearing Loss—Sid P. Bacon The outer hair cells in the cochlea have important perceptu- al consequences, such as enabling us to process sounds over an intensity range of about 12 orders of magnitude.
35 ASA—INCE/USA Synergy—Gerald C. Lauchle
The Acoustical Society of America and the Institute of Noise Control Engineering of the USA have many com- mon goals that can result in a beneficial synergism between the two organizations.
50 Standards News: When Standards and Clinical Practice Collide—Robert F. Burkard
In this particular instance, the worlds of clinical practice and standards development collided.
52 Musical Acoustics: Brass Acoustics—Is Propogation Linear or Nonlinear—James W. Beauchamp
The author’s attempt to create a source-filter model for brass synthesis led to an intriguing path of discovery.
54 National News—Elaine Moran
Acoustical news from around the country.
58 International News—Walter G. Mayer Acoustical news from around the world.
61 The Library—Dick Stern
New and recent publications, reports, and brochures on acoustics.
62 The Lab—Dick Stern
New and recent acoustic instrumentation and news about acoustic instrument manufacturers.
Business Directory
63 Business card advertisements 64 Index to Advertisers
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