If you can hear a "beep" sound in your headphones while talking to the customer, it most likely means that two drivers in your local settings are competing for the audio. This may cause brief interruptions to your call.
To solve it, you need to disable an option that allows applications to take exclusive control of your sound device. Here's a short step-by-step guide that will help you do it:
1. On your keyboard press the Windows button + S and then enter 'sound'. Choose 'Sound' from the list of results.
If you are redirected to this window, please choose Sound Control Panel from the left side menu:
2. Now locate your audio device. In our example it's Speakers, right-click on it and choose 'Properties'.
3. Go to the Advanced tab and uncheck 'Allow applications to take exclusive control of this device'
option. Next, click the 'Apply' and 'OK' buttons to save the settings.
4. Repeat the steps listed above for your device in the Recording tab. After doing that,
restart your PC.