Table Of Content

Applied Acoustics, Vol. 51, No. 4, pp. 451-452, 1997 © 1997 Elsevier Science Ltd. All rights reserved Printed in Great Britain ELSEVIER Contents of Volume 51 Number 1 1 Propagation of Train Noise in Housing Estates C. C. HENG (Singapore) 13 Outdoor Sound Propagation Measurements Using an MLS Technique K. HEUTSCHI & A. ROSENHECK (Switzerland) 33 Investigation of Environmental Low-Frequency Noise V. V. KRYLOV (UK) 53 An Evaluation of the Importance of Surface Diffusivity in Concert Halls C. H. HAAN (Korea) & F. R. FRICKE (Australia) 71 A New Method for Predicting the Sound Absorption of Perforated Absorber Systems D. TAKAHASHI (Japan) 85 An Investigation of the Characteristics of Impact Sound Sources for Impact Sound Insulation Measurement ; W. SHI, C. JOHANSSON & U. SUNDBACK (Sweden) Calendar Number 2 113 Noise Reduction with Actively Absorbing Silencers J. KRUGER & P. LEISTNER (Germany) 121 Designing Low Noise Burners Inside Firetubes G. SAMS & J. JORDAN (USA) 141 Identification of the Airborne Component of Tyre-induced Vehicle Interior Noise G. J. KIM, K. R. HOLLAND & N. LALOR (UK) 157 Vertical Directivity of Train Noise C. C. HENG (Singapore) 169 A Method for Predicting Acoustic Indices in Long Enclosures J. KANG (UK) 181 An Empirical Model for Rigid Frame Porous Materials with High Porosity N. VORONINA (Russia) 199 Fitting of Hearing Aids with Loudness Scaling of Music and Environmental Sounds W. GEERS (Germany), E. HOJAN & D. HOJAN-JEZIERSKA (Poland) Technical Note 211 Acrylic-glass Sound Absorbers in the Plenum of the Deutscher Bundestag H. V. FUCHS & X. ZHA (Germany) 219 Calendar 452 Contents of Volume 51 Number 3 Special Issue: Underwater Ambient Noise Modelling and Mechanics 223 Guest Editorial C. H. HARRISON (UK) 225 Sound Speed and Void Fraction Profiles in the Sea Surface Bubble Layer M. J. BUCKINGHAM (USA & UK) 251 The Modelling of Ambient Noise due to Shipping and Wind Sources in Complex Environments R. M. HAMSON (UK) CANARY: A Simple Model of Ambient Noise and Coherence C. H. HARRISON (UK) Ambient Sea Noise Dependence on Local, Regional and Geostrophic Wind Speeds: Implications for Forecasting Noise D. H. CATO & S. TAVENER (Australia) Calendar Number 4 343 Scattering Strength of a Gelidium Biomass Bottom R. CARBO & A. C. MOLERO (Spain) 353 Experimental Investigations on the Behavior of a Point Fixed in a Wheel or Rail Structure Compared with a Point Fixed Relative to the Contact Zone J. FELDMANN & R. DIEHL (Germany) Noise Control of Two-Wheeler Scooter Engine N. TANDON, B. C. NAKRA, B. SARKAR & V. ADYANTHAYA (india) A Comprehensive Crack Identification Algorithm for Beams Under Different End Conditions M. H. DADO (Jordan) 399 Psychoacoustic Tests for the Study of Human Echolocation Ability C. ARIAS & O. A. RAMOS (Argentina) 421 In Situ Method for Determining the Transmission Loss of Noise Barriers G. R. WATTS (UK) Technical Note 439 Human Echolocation: The ECOTEST System O. A. RAMOS & C. ARIAS (Argentina) 447 Calendar