Of course not! If there were nobody to ask questions, there would be no need to create a forum!
It’s very funny that you hear such hypnagogic sounds while MILD’ing. Generally people may have them when they WILD. You could add what you hear to theList of WILD sounds. 
By the way, just look at this list, it’s interesting to read all the different sounds people can hear. Technically, HH are what Claude Rifat, a scientist who was interested in hypnagogia and altered states of consciousness, called “disattenuated thoughts”. The level of awareness to thoughts is attenuated during the waking state, so that we don’t confuse thoughts with physical sensations. This attenuation is removed while falling asleep.
Everybody has HH when falling asleep but we most often are not aware of. On the other hand, HH are not LD’s, that’s why having HH doesn’t mean you have LD’s. The scientist Alfred Maury used to study HH, yet he never had a LD and believed it was impossible.
As for me, I suppose that having frequent HH could mean that you reach easily a deep hypnagogic state. It’s interesting for MILD and autosuggestion techniques, cause I’ve the feeling that it’s easier to implant a suggestion when you’re closer to sleep. Above all, it’s interesting for WILD of course.