I assume you have a house with a concrete floor and copper underneath it. You have a leak in the tubing somewhere. Normally it is the hot water, but if the noise continues after the water control valve is turned off, (and no water will come out of a hot water faucet when it is opened), then it is one of the rare cold water leaks. About the only way to locate it is to hire a leak locator service. Then a plumber to fix it. Also contact your home owner’s insurance company, since this is usually covered by your policy.