RECENT DEVELOPMENTS IN ACOUSTICS AND VIBRATION

In recent years there have been rapid advances in digital computers, the miniaturization of electronic circuits and the development of new materials. In the acoustics and vibration fields these advances have led to a continual increase in computational power and speed, improved acoustics and vibration transducers and instrumentation and better measurement techniques. In many cases the developments have been synergistic; new experimental knowledge has led to improved theoretical models and approaches and vice versa. Improved computers have allowed the development of a host of computer programs and increasing numbers have become available as commercial acoustics and vibration software. Of particular importance has been ‘ the development of numerical calculation schemes such as the finite element method (FEM) and the boundary element method (BEM) which have led to much improved predictive capabilities in many fields. However, advances have been in many other areas of acoustics as well and not confined just to such numerical prediction schemes. As examples, a few of these advances will be concisely summarized including: increased knowledge of and use of FEM and BEM, Computational Aeroacoustics, Sonochemist~, Thermoacoustic Engines, Active Noise and Vibration Control, Sound Intensity Measurements and their uses, Techniques of Speech Coding and Recognition of Speech, Ultrasonics in Medical Diagnostics, and Cochlear Mechanics.

[1]  Lawrence A. Crum,et al.  Sonochemistry and Sonoluminescence , 1999 .

[2]  D. Kemp.  Stimulated acoustic emissions from within the human auditory system. , 1978, The Journal of the Acoustical Society of America.

[3]  K. Suslick,et al.  The Temperature of Cavitation , 1991, Science.

[4]  L. Rayleigh,et al.  The theory of sound , 1894 .

[5]  Malcolm J. Crocker,et al.  Source Identification on a Diesel Engine Using Acoustic Intensity Measurements , 1982 .

[6]  Laurent Auriault,et al.  Computation of Mean Flow Refraction Effects on Jet Noise , 1997 .

[7]  K. J. Taylor,et al.  Mechanics of the guinea pig colea. , 1970, The Journal of the Acoustical Society of America.

[8]  Frank Fahy,et al.  Sound Intensity, Second Edition , 1989 .

[9]  Philip A. Nelson,et al.  An Experimental Investigation into the Active Control of Sound Transmission Through Stiff Light Composite Panels , 1993 .

[10]  James Lighthill.  Recent Advances in Interpreting Hearing Sensitivity , 1996 .

[11]  J. Ashmore,et al.  Charge displacement induced by rapid stretch in the basolateral membrane of the guinea-pig outer hair cell , 1994, Proceedings of the Royal Society of London. Series B: Biological Sciences.

[12]  Sadaoki Furui,et al.  Digital Speech Processing, Synthesis, and Recognition , 1989 .

[13]  Malcolm J. Crocker,et al.  Prediction of transmission loss in mufflers by the finite−element method , 1975 .

[14]  Philip A. Nelson,et al.  Active Control of Sound , 1992 .

[15]  Douglas G. MacMartin.  COLLOCATED STRUCTURAL CONTROL FOR REDUCTION OF AIRCRAFT CABIN NOISE , 1996 .

[16]  Jonathan Ashmore,et al.  The ear's fast cellular motor , 1993, Current Biology.

[17]  Ray Radebaugh,et al.  A review of pulse tube refrigeration , 1990 .

[18]  Chris R. Fuller,et al.  Concepts on an Integrated Design Approach to the Active Control of Structurally Radiated Noise (ASAC) , 1995 .

[19]  K. Suslick,et al.  Applications of Ultrasound to Materials Chemistry , 1995 .

[20]  F. Dunn,et al.  Ultrasonic Scattering in Biological Tissues , 1992 .

[21]  J. Ashmore,et al.  A cytoskeletal spring in cochlear outer hair cells , 1988, Nature.

[22]  F. Fahy.  Measurement of acoustic intensity using the cross‐spectral density of two microphone signals , 1977 .

[23]  J. Chung,et al.  Cross‐spectral method of measuring acoustic intensity without error caused by instrument phase mismatch , 1978 .

[24]  Chris R. Fuller,et al.  Active control of sound and vibration , 1990 .

[25]  Gareth J. Price,et al.  Current trends in sonochemistry , 1992 .

[26]  S.J. Elliott,et al.  Active noise control , 1993, IEEE Signal Processing Magazine.

[27]  Malcolm J. Crocker,et al.  Direct measurement of transmission loss of aircraft structures using the acoustic intensity approach , 1982 .

[28]  Douglas H. Norrie,et al.  An introduction to finite element analysis , 1978 .

[29]  Malcolm J. Crocker,et al.  Light aircraft sound transmission studies - Noise reduction model , 1987 .

[30]  Sir James Lighthill,et al.  Biomechanics of Hearing Sensitivity , 1991 .

[31]  J. Ashmore,et al.  Transducer Motor Coupling in Cochlear Outer Hair Cells , 1989 .

[32]  G. P. Eatwell,et al.  Active control of vibration , 1992 .

[33]  S. C. Southward,et al.  Active Control of Noise and Vibration , 1996 .

[34]  James F. Greenleaf,et al.  Tissue characterization with ultrasound , 1986 .

[35]  A. Craggs,et al.  The use of simple three-dimensional acoustic finite elements for determining the natural modes and frequencies of complex shaped enclosures , 1972 .

[36]  Gregory W. Swift,et al.  DESIGN ENVIRONMENT FOR LOW-AMPLITUDE THERMOACOUSTIC ENGINES , 1994 .

[37]  Malcolm J. Crocker,et al.  Introduction to the Two-Microphone Cross-Spectral Method of Determining Sound Intensity , 1984 .

[38]  M. O. Tokhi,et al.  Active noise control systems , 1987 .

[39]  Richard Raspet,et al.  General formulation of thermoacoustics for stacks having arbitrarily shaped pore cross sections , 1990 .

[40]  Ashmore Jf.  The G.L. Brown Prize Lecture. The cellular machinery of the cochlea , 1994 .

[41]  Malcolm J. Crocker,et al.  Acoustical analysts, testing, and design of flow‐reversing muffler chambers , 1975 .

[42]  Gregory W. Swift.  Thermoacoustic Engines and Refrigerators , 1995 .

[43]  J F Ashmore,et al.  Localization of cholinergic and purinergic receptors on outer hair cells isolated from the guinea-pig cochlea , 1992, Proceedings of the Royal Society of London. Series B: Biological Sciences.

[44]  Peter No,et al.  Digital Coding of Waveforms , 1986 .

[45]  Fabio Mammano,et al.  Reverse transduction measured in the isolated cochlea by laser Michelson interferometry , 1993, Nature.

[46]  G. W. Swift,et al.  Thermoacoustics in pin‐array stacks , 1993 .

[47]  Seungbae Lee,et al.  Computation of Noise from Homogeneous Turbulence and from a Free Jet , 1996 .

[48]  Xin Zhang,et al.  Progress in Computational Aeroacoustics in Predicting the Noise Radiated from Turbulent Flows , 1997 .

[49]  O. V. Abramov,et al.  Ultrasound in Liquid and Solid Metals , 1994 .

[50]  W. S. Rhode.  Observations of the vibration of the basilar membrane in squirrel monkeys using the Mössbauer technique. , 1971, The Journal of the Acoustical Society of America.

[51]  M. J. Crocker,et al.  Theoretical and experimental evaluation of transmission loss of cylinders , 1983 .

[52]  X. Zhang,et al.  An investigation of supersonic oscillatory cavity flows driven by thick shear layers , 1990, The Aeronautical Journal (1968).

[53]  Malcolm J. Crocker,et al.  Finite Element Acoustical Analysis of Complex Muffler Systems With and Without Wall Vibrations , 1977 .

[54]  Malcolm J. Crocker,et al.  Measurement of Transmission Loss of Panels by the Direct Determination of Transmitted Acoustic Intensity , 1981 .

[55]  John G. Proakis,et al.  Digital Communications , 1983 .

[56]  Thomas W. Parsons,et al.  Voice and Speech Processing , 1986 .

[57]  W. P. Arnott,et al.  Thermoacoustic engines , 1991, IEEE 1991 Ultrasonics Symposium,.

[58]  J. Ashmore,et al.  On the mechanism of a high-frequency force generator in outer hair cells isolated from the guinea pig cochlea , 1988, Proceedings of the Royal Society of London. Series B. Biological Sciences.