Compliance chambers for marine vibrators

摘要

A marine vibrator may include a containment housing, a sound radiating surface, and a compliance chamber. The compliance chamber may include a compliance chamber housing, a non-linear linkage assembly, and a low pressure chamber. The compliance chamber housing may define at least a portion of a compliance chamber internal volume having a compliance chamber internal gas pressure. The low pressure chamber may comprise a low pressure piston and a low pressure chamber housing. The low pressure chamber housing may define at least a portion of a low pressure chamber internal volume having a low pressure chamber internal gas pressure. The low pressure piston may be configured to move in response to a pressure differential across the low pressure piston such that a resonance frequency of the marine vibrator may be changed.

主权项

1. A marine vibrator comprising:
a containment housing, where the containment housing defines at least a portion of a marine vibrator internal volume having a marine vibrator internal gas pressure; a sound radiating surface; and a compliance chamber, wherein the compliance chamber comprises:
a compliance chamber housing, wherein the compliance chamber housing defines at least a portion of a compliance chamber internal volume having a chamber gas spring;a non-linear linkage assembly; anda low pressure chamber, wherein the low pressure chamber comprises:
a low pressure piston coupled to the non-linear linkage assembly, anda low pressure chamber housing, wherein the low pressure chamber housing defines at least a portion of a low pressure chamber internal volume having a low pressure chamber internal gas pressure, wherein a difference in the chamber gas spring and the low pressure chamber internal gas pressure produces a pressure differential across the low pressure piston, wherein the low pressure piston is configured to move in response to the pressure differential across the low pressure piston to change a resonance frequency of the marine vibrator.