Your microphone or audio device is capturing too much background noise. Check the following:
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Your computer’s fan or spinning hard drive is too close to the microphone.
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You may be sitting near a fan or air conditioning unit that is producing static noise.
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If are using a noise-canceling microphone, make sure it is positioned close to the mouth, approximately 2 centimeters or less than 1 inch away from the mouth. This filters out unwanted background noise, so it is important that you position it correctly to avoid audio issues.
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When you are using the speaker on your phone make sure that the phone is placed on a flat surface. Also, make sure that there is no obstruction between the phone and your mouth.
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If there is physical damage to the device, try using a different device.
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Make sure that the device you are using is optimized for Lync 2010 or Lync Online. For a list of optimized devices, see Phones and Devices Qualified for Microsoft Lync.
