If your employer has installed sound sensors around your office, you might be wondering what they'll be used for, and whether they affect your privacy. Both are understandable questions, and the short answer is that it depends on the sensor: if it's built to never record speech or save audio, your employer can only see how a room sounds, but not what anyone said.
In this article, we’ll explain why more workplaces are monitoring sound, what data a sound sensor collects, whether it can record your conversations, and what to ask about workplace noise monitoring privacy.
Employers monitor sound to find and fix noise problems, since noise is the most common complaint people have about their offices. A UC Berkeley Center for the Built Environment study of more than 62,000 office occupants found 54% were dissatisfied with acoustics, more than with any other aspect of indoor environmental quality (IEQ). People talking and a lack of speech privacy were among the top complaints.
Noise doesn't just make an office feel distracting and annoying; it also has significant, measurable impacts on your health, well-being, and productivity. Just like any other aspect of the indoor environment, such as air quality, it's impossible to fix something you don't measure.
Without data, there's no way to know whether a focus area stays quiet enough to work in, or whether new acoustic panels made a difference. If your employer is working toward acoustic comfort, they need continuous sound data to see whether each space supports the work you do there, from focused tasks to calls and collaboration, throughout the day.
It depends on the sensor: some measure only loudness in decibels, while others also track how much the sound level fluctuates and which frequencies make up the sound. Unlike a handheld decibel meter, which gives a one-time loudness check, a continuous sound monitor tracks how a space sounds throughout the day, so problems that come and go don't get missed.
The specific parameters vary by device. At Kaiterra, our sound sensor measures the three aspects of sound that shape acoustic comfort:
You need all of this data together to understand how a space actually sounds to the people working in it, since two rooms with the same average level can feel completely different.
Whether a sound sensor can record your conversations depends on the privacy measures built into it. Every sound sensor contains a microphone, since that is the necessary first step for measuring sound, but how much it is recording and what happens to the audio after that varies from one device to the next. A well-designed sensor only ever gives your employer the room’s sound data, never a clip of who was talking and what was talked about.
A common approach is to convert sound into measurements on the device itself, rather than sending raw audio to a server or the cloud. That keeps audio from traveling, which reduces in-transit security risks, but on its own it doesn’t rule out all possible risks. Whether a workplace sound sensor could still be turned into a recording device comes down to a few other factors:
Securing each of these takes its own safeguard. At Kaiterra, we use a four-layer approach:
With safeguards like these, your employer can see how a room sounds, but never hear what anyone said.
Airbnb drew the same line between measuring sound and recording it in 2024. It banned indoor security cameras in listings worldwide but still allows noise decibel monitors in common spaces, as long as hosts disclose them. Its current rules define these as devices that "assess sound levels and their duration but do not record audio," while any device that records or transmits audio is banned from monitoring the inside of the home.
If sound sensors have been installed in your workplace, you deserve to know whether your conversations are kept private. Ask these six questions to understand how the sensor handles sound, and whether privacy was built into its design:
Each of these questions should have a clear, definitive answer. Vague or missing answers may indicate that privacy isn't fully ensured by the sensor's design. You can also review the device's spec sheet and security documentation yourself to confirm the details.
At Kaiterra, we believe that transparency is crucial when it comes to monitoring sound in the office. If you want to learn more about why every sound sensor has to use a microphone, and what it takes to secure one, read our guide about measuring workplace sound securely. Or, if you want to know more about how Kaiterra ensures privacy with our sound sensor, read more about our approach to continuous sound monitoring.