Originally Posted by
flythemuppets
had the same problem using the A20 and the U Fly at 2 companies on the 737. I think it's the Boeing window heat but so far the clarity aloft has treated me really well. YMMV depending on intercom/rubber band usage.
Ahh thanks. I was also considering the UFly, but maybe not if it has the same problem. Has anyone noticed ANR interference with the David Clark ANR headsets?
Originally Posted by
cornbeef007
For the most part, mine works great. The only exception are a few of the 800s that create a slight oscillating hum (I can’t describe it either). To be honest I thought it was ambient noise causing an issue with ANR.
Since I have only a few issues, try this. I’ll get you a picture in a couple of days. I wedge the ANR battery pack between the visor track and the plastic just above the R2 window and directly below the jacks for the headset. I use the clips on either side of the battery pack to hang itself from the far side (away from you) of the visor track. I point the control panel up, which keeps the blinking light from bothering the OCD captains on night flights. Sorry but it’s difficult to describe.
I only have the issue with 1 out of 20 800s, so maybe placement is key.
Oscillating hum is a good way to describe it. I will try your method on my next trip. So basically you are keeping the battery pack as far away from the window heat as possible? Thanks for the tip.
Originally Posted by
BobZ
Sometimes replugging or moving the plugs in the jacks helps.
If you have cabin interphone audio selected on most airframes it causes a hum. And on some its really loud.
I have definitely heard this hum. It's a more constant hum and different from the one that seems to be caused by the ANR. Luckily I can just turn the cabin off when not needed.