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Originally Posted by compressioncut
Volume reverberation is caused by junk (suspended particles, bubbles, etc) in the water
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It's a long time ago, but i thought this effect was called surface or bottom referberation. But i migh error here.
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causing uneven and unpredictable sound propagation and return.
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Becose of an uneven concentration of junk in the water ?
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I've only ever used the phenomena as it relates to active sonar transmissions and returns, not ownship noise or passive sonar.
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Don't know how it is with ships but for submarines the volume referberation als throws back part of the OSN back at the sub and increase the ovrall interfering noise that way, if i remember right.
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I don't think it's much of a concern at the low frequencies involved in passive sonar.
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Why not ?
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What you're talking about sounds like bottom bounce and surface bounce, with OSN reflecting back directly onto OS sensors. Sounds like something unique to subs, and certainly new to me.
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Yes some sort of a resonance effect near the surface or hard bottom.
Deamon