Noisy Zennith 2nd stage when exhaling

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R

reactan

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Hi,

Ive gotten about 5 dives in with my D3/Zennith reg, Ive noticed that there is a low pitched " flapping" sound when im exhaling. This is my first reg, so i dont know if its normal.. but ive never heard this sound on any of my previous rental regs.

Would appreciate any explanation/assistance. Many Thanks!

Alvin
 
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