Patent ID: 9645264
Date: 2017-05-09
CPC Classifications: G01V,G10K

Claim:
1. A sound source for marine geophysical surveys, comprising: an outer flextensional shell containing a first gas at a first gas pressure, wherein the outer flextensional shell is operable to vibrate and flex to generate acoustic energy: a compliance chamber in indirect fluid communication with the first gas such that the first gas does not intermix with second gas in the compliance chamber, wherein the second gas is at a second gas pressure, wherein the second gas pressure is lower than the first gas pressure, wherein the compliance chamber is operable to adjust a resonance frequency of the sound source to compensate for changes in the first gas pressure through a volume change in the compliance chamber; and a driver separate from the compliance chamber, wherein the driver is operable to cause vibration and flexing of the outer flextensional shell.