The problems with acoustics on a small planet

In recent years increased attention has been paid to the potential uses of acoustics for extraterrestrial exploration. This paper concerns two aspects which should be taken into account when transposing terrestrial experience with acoustics to smaller worlds. These are, specifically, the effect on the acoustics of the variation of gravity with depth, and the curvature of the world's surface. A case resembling Europa is used quantitatively to illustrate these effects, indicating significant errors if these factors are neglected.

[1]  Timothy G. Leighton,et al.  The sounds of seas in space , 2005 .

[2]  Australia-Bermuda Sound Transmission Experiment (1960) Revisited , 1988 .

[3]  R. Kirk,et al.  The lakes of Titan , 2006, Nature.

[4]  B. R. Tufts,et al.  Distribution of strike‐slip faults on Europa , 2000 .

[5]  F. Ferri,et al.  Methane drizzle on Titan , 2006, Nature.

[6]  N. C. Santos,et al.  Asteroseismology of the planet-hosting star μ Arae I. The acoustic spectrum , 2005 .

[7]  Nicholas C. Makris,et al.  Mechanics of tidally driven fractures in Europa's ice shell , 2005 .

[8]  Frank Verheest,et al.  Are weak dust-acoustic double layers adequately described by modified Korteweg–de Vries equations? , 1993 .

[9]  B. Romanowicz,et al.  Long-period seismology on Europa: 2. Predicted seismic response , 2006 .

[10]  Gabor J. Kalman,et al.  Dust acoustic waves in strongly coupled dusty plasmas , 1997 .

[11]  S. Ghosh,et al.  Effect of nonadiabaticity of dust charge variation on dust acoustic waves: generation of dust acoustic shock waves. , 2001, Physical review. E, Statistical, nonlinear, and soft matter physics.

[12]  M. D. Collins,et al.  Comparison of data and model predictions for Heard Island acoustic transmissions , 1994 .

[13]  A. Showman,et al.  Effects of plasticity on convection in an ice shell: Implications for Europa , 2004 .

[14]  R. Merlino,et al.  Current-driven dust ion-acoustic instability in a collisional dusty plasma , 1997 .

[15]  C. T. Russell,et al.  Induced magnetic fields as evidence for subsurface oceans in Europa and Callisto , 1998, Nature.

[16]  W. Rammacher,et al.  Acoustic waves in the solar atmosphere. IX - Three minute pulsations driven by shock overtaking , 1992 .

[17]  James C Preisig,et al.  Modal analysis of broadband acoustic receptions at 3515-km range in the North Pacific using short-time Fourier techniques. , 2003, The Journal of the Acoustical Society of America.

[18]  Janet G. Luhmann,et al.  Development of an Audio Microphone for the Mars Surveyor 98 Lander , 1998 .

[19]  F. Nimmo,et al.  Normal faulting on Europa: implications for ice shell properties , 2005 .

[20]  H. Melosh,et al.  The temperature of Europa's subsurface water ocean , 2004 .

[21]  Nicholas C. Makris,et al.  Probing Europa's interior with natural sound sources , 2003 .

[22]  Timothy G. Leighton,et al.  The use of acoustics in space exploration , 2007 .

[23]  D. Stevenson,et al.  Gas-driven water volcanism and the resurfacing of Europa , 1985 .

[24]  R. Greeley,et al.  Geological evidence for solid-state convection in Europa's ice shell , 1998, Nature.

[25]  Richard M. Lueptow,et al.  Atmospheric acoustics of Titan, Mars, Venus, and Earth , 2007 .

[26]  W. W. L. Taylor,et al.  THE ELECTRICAL ACTIVITY OF THE ATMOSPHERE OF VENUS , 2022, Venus.

[27]  Robert L. Kovach,et al.  Seismic Detectability of a Subsurface Ocean on Europa , 2001 .

[28]  Günter Kargl,et al.  A soft solid surface on Titan as revealed by the Huygens Surface Science Package , 2005, Nature.

[29]  P. Shukla,et al.  Dust acoustic wave in a thermal dusty plasma. , 2000, Physical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics.

[30]  P. White,et al.  Ocean acoustic circumpropagation in the ice seas of Europa , 2007 .

[31]  S. Debei,et al.  In situ measurements of the physical characteristics of Titan's environment , 2005, Nature.

[32]  Y. Elsworth,et al.  Variation of low-order acoustic solar oscillations over the solar cycle , 1990, Nature.

[33]  Umin Lee,et al.  Acoustic oscillations of Jupiter , 1992 .

[34]  H. Saunders,et al.  Noise and vibration , 1982 .

[35]  P. Schenk,et al.  Fault offsets and lateral crustal movement on Europa - Evidence for a mobile ice shell , 1985 .

[36]  C. Russell,et al.  Galileo magnetometer measurements: a stronger case for a subsurface ocean at Europa. , 2000, Science.

[37]  Jean-Pierre Lebreton,et al.  An overview of the descent and landing of the Huygens probe on Titan , 2005, Nature.

[38]  Acoustic thermometry in the Arctic Ocean , 2001 .

[39]  Timothy G. Leighton,et al.  The sound of Titan: a role for acoustics in space exploration , 2004 .

[40]  Timothy G. Leighton,et al.  FROM SEA TO SURGERIES, FROM BABBLING BROOKS TO BABY SCANS: BUBBLE ACOUSTICS AT ISVR , 2023, Spring Conference Acoustics 2004.

[41]  Pieper,et al.  Dispersion of Plasma Dust Acoustic Waves in the Strong-Coupling Regime. , 1996, Physical review letters.