Ahh Mr Chen we met again :-) .......... Well no doubt my ears have been somewhat compromised from my years playing in rock bands, and long recording sessions in various studios. However my wife's ears are still as good as new, and even when I sometimes turn my ASIAIR on in my sun room, as she is reading nearby, she never once has even asked what those beeps are. Nor have they disturbed our cat who normally is curled up sleeping on her lap there as she is reading.
OK I get it, for some the beep could be an annoying issue, and in no way am I discounting that. However of all the problems with this product this is one that we all can easily deal with. It takes no more effort than I do, when I loosely cover my ASIAIR to conceal the red lights it so proudly displays, outside all night long as it announces it's exact location to anyone driving by looking to quickly get into to the Astrophotography hobby.
In the case of the ASIAIR since the beep we are speaking of is outdoors, is a short beep, and is small ( not likely to reverberate), it's sound energy is essentially dissipated over the square of the distance from the source. The inverse square law which I know you as fan of mathematics are well familiar with.
When you factor that with all the other sounds that we suffer with hearing all night all summer long when our windows wide open I would be thrilled to only hear that momentary beep once or twice a night. I must admit however to being spoiled by the total silence we experience each night, except for an Elk or Moose bulging, or a Coyote or Wolf crying out when we are out at our second home in Jackson Hole Wyoming.
I'm not sure just how far the red lights I am more annoyed with are visible but I do know I can see them many times further from my ASIAIR than I can hear any beeps. Of course my experience with this issue is limited to the sound I hear from my ASIAIR which is only 6 months old and FW 1,5 and after.