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Hello, I've already send a support request two weeks ago but never got a respond so I'll take my chance here. I can hear a very high pitch noise in the left ear that I cannot bear. I've tried everything to fix it but nothing worked. I've got a replacement but the problem is still there. Note that this problem is not related to my hardware as I've tried on other devices. Is there anything to fix it or do I have to ask for a refunds ? Thanks.