Oops. Meant to post the link.
http://en.wikipedia.org/wiki/Tinnitus
Okay, so here you go.
In OBJECTIVE tinnitis, a clinician can actually hear the sound eminating from the patient's ears.
In SUBJECTIVE tinnitis, only the patient himself can hear it.
If you yourself wear hearing aids, maybe you are hearing the buzzing of your hearing aid battery when you put your head up against your grandson's? Or (if he is little and can't tell you) is there any possibility he has a small hearing-aid battery stuck in his ear canal? I know those things sound far-fetched, but it does sound like (if the noise is really coming from him) something is in his ear that is causing the noise, and a bug or a tiny electronic that makes noise are the only things I can think of. I don't think tinnitis can be heard by another person.
Take him to a doctor and have him checked ... if it's a foreign object in his ear, it needs to be out of there before it does big damage.
How long has it been happening? I've heard of insects in the ear, but it seems like he would know if one was there. In an article I read, the bug was discovered by a doctor by its noise.
Well tinnitus can be heard in our own heads but by other folks , hey I havent heard of that , does anyone know ...help
It sounds like severe Tinitus.. That annoying ringing and buzzing you get in your ear sometimes. or it could be something else if his ear hurts. take him to his pediatrician and see what they say