Your Speaker Might Be Recording Client Calls — Here's What I Found

After That Meeting, I Got a Little Scared

Last year I was on a client video call at home with a Bluetooth speaker playing background music on my desk. We talked about pricing, about competitors — and when it was over I suddenly thought: these devices... are all "on." Then I came across a research paper saying speakers can, under certain conditions, be repurposed as microphones. I sat there frozen for a few seconds. I'm not a security expert, and I honestly don't know whether I was ever actually at risk — but I realized I had never once thought about this.

What Is This Research, and Has Anyone Actually Verified It?

In 2017, a security research team at Ben-Gurion University in Israel published a paper titled SPE AKE(a)R. Their finding: a computer's sound card has a feature that can redefine the headphone jack as an input port — meaning ordinary headphones or speakers plugged into a computer can , in theory, be quietly switched into recording devices by certain malicious software.

This doesn't mean your speaker is going to be hijacked by a hacker tomorrow . But it does point to something: our default assumptions about "which devices are listening" might be wrong.

I have a friend who does brand consulting — her name is Xi aowen — and she works from home in Beijing taking remote client calls, with a set of computer speakers permanently on her desk. Her first reaction when she saw this research: "I can't even tell when these speakers are active and when they're not." Her fix was dead simple: before any important meeting, she unplugs the speakers she isn't using.

What You Can Do Today — Cost Is Basically Zero

Money: ¥0. The first step I'm describing requires buying nothing.
Time: 5 minutes.
Technical barrier : none. It's as simple as pulling a plug.

First step — you can do this right now:
Take a look at which powered devices are sitting on your desk during calls — speakers, headphones, smart speakers (like Xiaomi's X iao Ai or Tmall Genie). Before an important meeting, unplug any devices you don't need, or press the physical mute button on your smart speaker (the actual hardware button, not the one in an app).

If you want to go a step further, check your computer's sound settings to see which device is currently set as the "input device" — on Windows, right-click the volume icon in the bottom-right corner; on Mac, go to System Settings → Sound → Input. You don't need to change anything. Just look. Build that awareness.

You don't need to do this every day — just once before any conversation involving sensitive information (pricing, client lists, partnership details).

Where You Are Right Now Changes My Advice

If you're just starting out and don't have regular clients yet : Don't spend dedicated time on this now. Just file it away. When you start having formal client meetings, come back to this.

If you already have one or two clients and hold regular online meetings: I'd suggest building one small habit — 30 seconds before a call, scan your desk and unplug any audio devices you're not using. No purchases, no technical knowledge needed. Just that one move.

If you're scaling up, have a team of two to five people, and regularly discuss commercially sensitive information: Consider putting together a dedicated "meeting device chec klist" — a fixed list of what needs to be disconnected before calls. You might also think about whether to designate a specific meeting spot (even just a consistent corner of your home) separate from your everyday workspace.

One last thing: not everyone needs to take this seriously. If your work doesn't involve client privacy or business secrets, ignoring this entirely is completely fine. I wrote this simply so you'd know it exists. What you do with that is entirely up to you.