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    Re: Noisy Sea Surface
    From: Keith Williams
    Date: 2003 Nov 15, 21:17 +0530

    To clarify - I have only heard this noise when I have been down below in
    a boat. The noise appears to come from all parts of the hull below
    water. I can be (almost!!) certain that the noise appears even on a
    newly-antifouled boat, so feeding on algae could be contra-indicated by
    My boat is a cold-moulded wooden boat with epoxy-glass outer skin. I
    have not heard the noise from within a steel hulled boat, but I have
    from within a glassfibre boat. I assume this is because I haven't spent
    much time in metal boats.
    The noise is not very high frequency by standard human measures, almost
    exactly what I make by making a clicking noise in my mouth; and the best
    description is clicking - certainly each sound is not a scrape (ie, each
    noise is short); I mentioned explosive bubbles because that really is
    the best description. Like having a champagne supply under the boat.
    Keith Williams

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