Electronic ignitions of all types are typically silent when activated. One or two may have some kind of "beep" but the vast majority do not. Even when functioning providing spark to the plug there will generally be no noise from the ignition. The only noise to be heard with a functional ignition will be the sound of an electrical arc at the plug electrode if the plug was removed from the engine or the sweet sound of raw power passing through the exhaust pipe(s).

I agree with the others. If you're hearing something with the ignition turned on run like the wind. Sucker coiuld have been packed and ticking down the time to explosion