Has this ever happened to you? You walk into a conference room where a call is already in progress, you open your laptop to follow the slides more closely, you click "Join" and... A deafening whistle rips through the room, colleagues cover their ears, and you desperately scramble to mute your volume or close the tab.
That annoying noise isn't a glitch in your computer; it’s a physical phenomenon called audio feedback (or the Larsen effect). The good news? There is a "secret" button in Google Meet to avoid this forever.
Why do I hear an echo or a whistle during meetings?
Without getting into lab-coat technicalities, the problem is simple: your computer's microphone "hears" the audio coming out of the room's speakers and feeds it back into the call. This creates an infinite loop that turns into a whistle or an unbearable echo.
Usually, the panic-induced solution is: "Mute your mic! No, turn off your speakers too!". It’s a chaotic mess that wastes time and tests everyone's patience.
The Solution: Companion Mode
Google introduced a specific feature to solve this problem, but the name doesn't exactly make it easy to find: it’s called Companion Mode.
Instead of joining a meeting the classic way, this mode allows you to step in "on tiptoe."
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What it does: It instantly disables your microphone and speakers so they don't interfere with the room's audio.
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What it lets you do: It gives you full access to the chat, polls, hand-raising, and screen sharing.
In short, you are in the meeting with all your tools, but without the risk of deafening everyone present.
How to Activate Companion Mode (Video Tutorial)
For those who prefer to see how it's done in practice, I’ve prepared a short video guide on my channel, Philip Nel Web. In less than three minutes, I’ll show you exactly where to click so you never mess up a group call entry again.
https://youtu.be/Dw4g4gJ6hGcWhen should you use it?
Companion Mode is your best friend if:
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You are in the office: You join from your laptop while in a meeting room with an active professional audio/video system.
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You need a second screen: You want to use a tablet or a second laptop just to manage the chat or see participants better.
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You want to present slides: You want to share your screen from your seat without creating audio conflicts.
Conclusion
Making technology accessible also means learning these small tricks that save us from embarrassing moments and headaches. The next time you walk into a conference room, ignore the big blue "Join" button and look for the link "Use Companion Mode". Your colleagues' eardrums will thank you.
Have you already tried this feature, or are you still from the "panic-mute everything at the last second" school of thought?