1000 



100 



= 1 1 I I I Ml| 1 1 I I I I III 1 1 I I I III 



10 — 



E 



m 1 



< 0.1 



0.01 



0.001 



0.0001 



I I I llll| 1 — I I I llll| I I I I I 1 1: 



O — sands (all sizes) 

 D — clay, silt (mud) 

 A — mixed sizes 



silty sand, sandy 

 silt) 



J I I I I ml 



i I I I I ml 



I I I I I III I 1 I II I III I I I M II 



I I I im 



1 

 FREQUENCY, kHz 



100 



Figure 7. Attenuation of compressional (sound) waves versus frequency in natural, saturated sediments 

 and sedimentary strata. The solid lines and symbols are from HamO ton (1972, Figure 2); the open 

 symbols and dashed hnes are newly-added data. The lines marked "J" and "I" represent general 

 equations for the Japan Sea and Indian Ocean Central Basin (from Neprochnov, 1971). The vertical, 

 dashed lines indicate a range of attenuation values at a single frequency. The line labelled "f 1" indi- 

 cates the slope of any hne having a dependence of attenuation on the first power of frequency. 



35 



