Using the Pool Scope,  you will also be able to hear leaks in structural cracks.  Want to know the sensitivity of the Pool Scope? Imagine hearing bubbles under Icebergs! (See the National Geographic video below and be amazed!). In a pool, the weight of the water pushing through the crack will create a sound that’s picked up, even at distances, by our scope. It’s how we can pinpoint the leak accurately. As the pool scope gets closer to the actual leak, the noise will become incredibly louder; it sounds like a jet!