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Vol 29 No 3

CONTENTS

December 2001


ARTICLES

Vibrate in Music
Fletcher N H
PDF Full Paper

Recent developments in the Application of Neural Network Analysis to Architectural and Building Acoustics
Nannariello J, Osman M R & Fricke F R
PDF Full Paper

Aeroacoustic Noise and the Motor Vehicle: Research at RMIT University,
Watkins S, Mousley P D Milbank J & Alam F
PDF Full Paper

Technical Notes

"Dodec" Speaker Construction
Patrick P
PDF Full Paper

Implementation of NSW Noise Policy - An Update
Mellor G & Lahban V
PDF Full Paper

Book Reviews
Future Meetings
Meeting Reports
Council News
Standards Australia
FASTS
News Items
Letters
New Members
New Products
Annual Index
Diary
Acoustics Australia Information
Australian Acoustical Society Information
Advertisers Index


VIBRATO IN MUSIC

Neville H. Fletcher
Research School of Physical Sciences and Engineering
Australian National University, Canherra 0200

Vol. 29, No. 3 pp 97-102 (2001)
ABSTRACT. Vibrato, which is an oscillation in the pitch, loudness or timbre of a musical tone, is a very important aspect of musical performance. This paper discusses the ways in which vibrato can be analysed, and also the ways in which it can be produced by performers on musical instruments and by singers.

RECENT DEVELOPMENTS IN THE APPLICATION OF NEURAL NETWORK ANALYSIS TO ARCHITECTURAL AND BUILDING ACOUSTICS

Joseph Nannariello, M, Riduan Osman and Fergus R, Fricke
Department of Architectural and Design Science,
University of Sydney, NSW 2006

Vol. 29, No. 3 pp 103-110 (2001)
Abstract: This paper reviews the work undertaken in the Department of Architectural and Design Science University of Sydney, on the use of neural network analysis in architectural and building acoustics. In auditorium acoustics, developments include the use of neural networks to predict acoustical attributes of concert halls: attributes such as reverberation time, RT60, Strength factor, G, clarity factor, C80, and lateral fraction, LF Investigations have also been undertaken relating the acoustic quality of auditoria, as judged by conductors and musicians, to ten hall 'geometric' parameters and six acoustic parameters. In the area of small rooms, investigations have been carried out to predict the acoustic quality of music practice rooms and music teaching rooms by utilizing a combination of geometric variables as inputs. In rooms used for speech, neural network analyses have been undertaken to predict speech levels in university classrooms. Finally, in the area of noise control in buildings, work has been carried out using neural networks to predict the properties of acoustical materials such as sound transmission loss (wall sound insulation) and absorption coefficients. The results of the work undertaken have shown the potential usefulness of neural networks as design tools and significantly, that neural network techniques have a role to play in the field of architectural and building acoustics.

AEROACOUSTIC NOISE AND THE MOTOR VEHICLE: RESEARCH AT RMIT UNIVERSITY

Simon Watkins, Peter D, Mousley,
Juliette Milbank and Firoz Alam
Dept, of Mechanical and Manufacturing Engineering
RMIT University, Melhourne, Australia

Vol. 29, No. 3 pp 111-115 (2001)
ABSTRACT: With every new model of car, customers expect reductions in noise and increases in refinement. Aeroacoustic noise plays a significant role in reducing the perception of quality of a vehicle and thus vehicle manufacturers now place a high priority on reducing this noise. In this paper, an overview of the common aeroacoustic noise sources in vehicles, and the research being conducted at RMIT University to better understand and reduce aeroacoustic noise, is discussed.

"DODEC" SPEAKER CONSTRUCTION

Peter Patrick,
Scientific Acoustics
10 Harth St. Toowoomba 4350

Vol. 29, No. 3 pp 117-118 (2001)
If you have occasional need for a dodecahedral loudspeaker, and would build one yourself but for the compound mitre joints involved, this process could be for you.

IMPLEMENTATION OF NSW NOISE POLICY - AN UPDATE

Geoff Mellor and Vicki Labban,
NSW Environment Protection Authority
PO Pox A290, Sydney South, NSW 1232

Vol. 29, No. 3 pp 119-121 (2001)
This is an edited version of the presentation at the NSW Divisional Meeting in August 2001.

 

Newsflash

PROPOSED INTERNATIONAL YEAR OF SOUND 2019

Let's make 2019 the International Year of Sound!

Click here to see draft prospectus. Suggestions for major activities that would be truly international to strengthen the application are welcomed.

 

ACOUSTICS 2017

Perth, Western Australia 19-22 November 2017