Question about Bose Aviation Headset X Headset

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Bose Aviation headset Series 2 has high-pitched squeal.

I have a Bose Series II Aviation Headset that squeals like crazy. I have changed Noise Reduction (NR) circuit card, I have changed the circuit card which 12v power connects to. Dont know what else to do. For some reason when I change each thing out, it works. Then when I put everything back together and tighten all the screws on, it begins to squeal again. I checked out the earphone speaker, it looks good. I tested the earphone speakers on a good headset, and it works fine. WHAT THE HELL DO I DO?!? I have a similar problem. Sent it to Bose twice, the sent it back saying it's good, but when I used it the problem still existed.

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Try wearing the headset the "wrong way". The left side of the headset on your right ear & the right side of the headset on your left ear. I have the QC15 with the same problem and it worked for me. Good luck!

Posted on Aug 02, 2012

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Posted on Jan 02, 2017

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Bose QC3 makes a high pitch noise when i press it against my ear


The design of these headphones includes a microphone on the outside and on the inside of each earcup. The outside microphone detects outside noise. The inside microphone monitors what you are hearing and when it detects that the outside noise is present inside, the active noise-canceling circuits remove that noise. This happens fast enough that you perceive a siginficant reduction in the outside noise getting to your ears.

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If the feedback occurs too easily when you are NOT pressing on the earcup, then the foam may have weakened/deteriorated and it may be time to replace the ear cushion.

On my QC-3 headphones, I can cause the feedback squeal in both earcups, with the left earcup being more sensitive to the shape change than the right.

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