There are many possible causes for this. The most common cases are as follows, 1.Insufficient PC capability. >An alert is displayed by Zoom. Stopping the video will solve the problem. 2. Voice may be interrupted by the noise canceling function when there is a lot of ambient voice noise such as FAN sound. If the noise cancelling of the microphone speaker is the cause, the This may be caused by the laptop PC's fan. Using a headset can solve these problems. For problems that occur in conference rooms, I recommend the YAMAHA YVC-1000