Question about buzzing feeling in my bc

[crowny]

I am still a new diver and getting used to equipment, and ran into a weird experience the other night I wanted to ask everyone about. About halfway through a shallow dive (55ft or so), i felt a buzzing in my left rib area, i thought it felt like air escaping. ( i was not adding or dumping air when it happened, just swimming along the bottom) My bc worked fine the whole time, and when I get home i checked it for bubble leaks in the tub. Is it something that happens when air moves around in the bc? I have a ScubaPro knighthawk.

Thanks for helping

 

[TSandM]

You can get some interesting bubbling or squeaking noises, as air moves from one side of the bladder to the other.

 

[ben_wilson3301]

Most likely a bad o-ring on the tank valve. Under water your ability to tell directionality of sound is non existent. It usually sounds like a buzzing.

 

[Peter_C]

Check the inflator. Did you have to vent air out, as in more than you would think from a leaky inflator? It could be leaking just ever so slightly. Do you have an AIR II?

Hook everything up to a tank, and hit the inflator a few times listening for it to continue filling with air after you stop. Check all the fittings as suggested above it could be another source. Starting with the BC mostly full, leave it sit for say hours and see if the BC fills up taunt.

If you can't find anything take it diving again on a shallow dive (Pool should work) and see what you can discover.

 

[fisheater]

Next time it happens, have your dive buddy do a thorough bubble check.


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[diveprof]

The Knighthawk is a back inflation BC so there shouldn't be a buzzing in the left rib area from the BCD. Air 2 bubbling that hard, you would have noticed. You stated a "feeling of buzzing" - not hearing a noise. I bet TS&M is right. Of course, if you like me had combination number 18 at the local Mexican restaurant last night - might be instestinal gas shifting.

 

[diveprof]

Another less likely scenario could be the activation of the overpressurization valve (could give a buzzing feeling - though not really in the left rib area) if diving substantially overweighted. If this were the case the BCD would not leak at normal inflation level.