If it don't sound like you sliding furniture around your crib on hardwood floors.
If she's gotta tell you harder.
If she can actually make out coherent words and it doesn't sound like incoherent babbling -- like she's drowning or some shyt.
If she doesn't at some point prior to the babble stage let out a deep and guttural, "ohhhhhhhhhhhhhhhhhhhh, shyttttttttttttttttttt."
