When you speak into a microphone during a NetMeeting conference to a participant who is using a full-duplex sound card, your voice may echo back through your speakers or headphones.

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One of the meeting participants may be listening to you with his or her microphone positioned too close to the speakers.

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To prevent your voice from echoing during a NetMeeting conference, the other NetMeeting participant can:

•	Move his or her microphone away from the speakers.
•	Decrease the volume of the speakers.
•	Adjust the sensitivity of his or her microphone.
•	Run the Audio Tuning Wizard.
•	Disable the use of full-duplex audio drivers.
•	Use headphones.

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To Run the Audio Tuning Wizard

Windows 95 and Windows NT:

1.	On the Tools menu, click Options.
2.	Click Audio Tuning Wizard, and follow the instructions on the screen.

Windows 98:

1.	On the Tools menu, click Options, and then click the Audio tab.
2.	Click Tuning Wizard, and then follow the instruction on the screen.

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To Disable the Use of Full-Duplex Audio Drivers

1.	On the Tools menu, click Options.
2.	Click the Audio tab.
3.	Click the Enable full duplex audio so I can speak while receiving audio check box to clear it.

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To Adjust the Microphone Sensitivity

1.	On the Tools menu, click Options.
2.	Click the Audio tab.
3.	In the Microphone Sensitivity section, click the Let me adjust sensitivity myself check box to select it.
4.	Slide the microphone sensitivity slider to the left to decrease the microphone's sensitivity to sound.
5.	Click OK.

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Full-duplex sound cards allow simultaneous processing of sound recording and playback. If you are using a full-duplex sound card, you can talk into a microphone and simultaneously listen to another NetMeeting participant with your speakers or headphones. When you speak into the microphone, your voice is heard through the speakers or headphones of the other NetMeeting participants. If one of the NetMeeting participants is using speakers and a full-duplex sound card, your voice may be transmitted from his or her speakers to his or her microphone and back to your speakers or headphones.

When you are using a half-duplex sound card, you must wait for the meeting participant to finish speaking before you can speak into the microphone.

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