If you get echoes, try the following:
If using an external microphone and speakers:
- Lower the volume of your speakers.
- Move the microphone further away from the speakers.
- Switch to a headset or USB phone.
- If using a laptop microphone and speakers, use a headset or USB phone instead. Since laptop microphone and speakers are close together, they will usually cause echo and feedback. (Most laptop computers tend to have mediocre speakers and microphones, so a headset or USB phone will greatly improve the sound quality, in addition to eliminating echo.)
- In Skype make sure that the mic and speakers are balanced. Also, do not have it checked to auto adjust.