Hey Guys,
Just thought I’d share something that worked surprisingly well for me. I’m making a kayak using infusion and was have trouble finding all of the leaks in my bag. Turns out in a 14.5’ mold there can be quite a few leaks I was able to download a microphone amplifier app for my cell phone and, using a pair a headphones, pretty easily found leaks that I absolutely had no chance of hearing with just my ears.
I found that it was even better if I cut the bottom out of a plastic cup and put that over my phone so I could listen to specific areas.
I don’t know how this forum view about posting third party apps but I found a free one that allowed my to adjust the gain on various frequencies which was very help full.
I know this probably isn’t anywhere near as good as a dedicated ultrasonic detector but it was pretty helpful for my needs.