a. Notebook problem: Do not use the microphone and speaker built into the notebook.

b. Desktop problems: Do not use the microphone that comes with the camera.

c. Do not aim the microphone in the direction of the speaker.

d. The distance between the sound and the microphone should be a little farther.

e. The conference room should choose a unidirectional dynamic microphone or wireless microphone.

f. The mixer is the key to improving audio quality in large conference rooms.

g. Use the mixer or the speaker to enhance the volume of the dynamic microphone.