技術者はビデオ会議用に新しい USB ヘッドセットをテストする必要があります。オーディオの再生は期待どおりに機能しますが、マイクからの音声は録音されません。デバイス マネージャーとサウンド設定には、マイクがインストールされていることが表示されます。技術者が次に行うべきことは次のうちどれですか?
正解:A
One of the possible reasons for the USB headset microphone not working is that the microphone is muted in the application or device settings. The technician should check if the mute button on the headset or the microphone icon in the application is active. If so, the technician should disable them and try to record sound again. Some applications may also have their own settings for the microphone input. The technician should make sure that the USB headset is selected as the input device and that the volume level is appropriate. The technician can also test the microphone in different applications to see if the problem is specific to one application or not.