| Vol 28 No 2 | CONTENTS |
August 2000 |
Atmospheric Infrasound
A. Bedard Jr. and T. Georges
The Physiological Demands on Wind Instrument Performance
N. Fletcher
Science and the Stradivarius
C. Gough
Solving a Baffling Problem at Warringah Aquatic Centre
J. Andrew and D. Pritchett
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New Members
Letter
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Diary
Acoustics Australia Information
Australian Acoustical Society Information
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Alfred J. Bedard Jr.1 and Thomas M. Georges2
1 National Oceanic and Atmospheric Administrations's Environmental Technology Laboratory in Boulder, Colorado.
2 NOAA/Colorado State university Cooperative Institute for Research in the Atmosphere, also in Boulder
Reprinted, with permission, from Physics Today 53, 32-37 (2000). Copyright 2000, American Institute of Physics
Vol. 28, No. 2 pp 47-52 (2000)
ABSTRACT: The search for ways to monitor compliance with the Comprehensive Test Ban Treaty has sparked renewed interest in sounds with frequencies too low for humans to hear.
Neville H. Fletcher
Research School of Physical Sciences and Engineering Australian National University, Canberra 0200
Vol. 28, No. 2 pp 53-56 (2000)
ABSTRACT: Requirements on blowing pressure and lip tension in playing of woodwind and brass instruments are examined and related to the sound-producing mechanism in each case. Loud playing of high notes on brass instruments is found to be the most physiologically demanding situation, but all instruments have particular requirements for precise physiological control.
Colin Gough
School of Physics and Astronomy
University of Birmingham
Edgbaston, Birmingham B15 2TT
email: c.gough@bham.ac.uk
Vol. 28, No. 2 pp 57-64 (2000)
ABSTRACT: Stradivarius violins are among the most sought-after musical instruments in the world. But is there a secret that makes a Stradivarius sound so good, and can modern violins match the wonderful tonal quality of this great Italian instrument?
SOLVING A BAFFLING PROBLEM AT WARRINGAH AQUATIC CENTRE
John Andrew1 and David Pritchett2
1 PKA Acoustic Consulting
Suite 103, 220 Pacific Highway, Crows Nest NSW 2065
2 David Pritchett Pty Ltd, 40 Cambourne Avenue, St Ives NSW 2075
Vol. 28, No. 2 pp 65-67 (2000)
ABSTRACT: Warringah Aquatic Centre has for 20 years been a major sporting and recreation drawcard for tens of thousands of people on the lower north shore and lower northern beaches of Sydney. Noise reverberation has always been a concern at the Centre, even though baffles were installed in the concrete ceiling about 15 years ago. When the baffles began to deteriorate over the past couple of years, the situation became critical. This article describes how the problem was overcome, in spite of considerable challenges.