The rapid evolution of artificial intelligence has reached the world of acoustics. Industry discussions highlight a shift toward AI-powered sound management—systems that use sensors to detect spikes in office noise and adjust sound masking levels in real-time. On the surface, a system that “thinks” and reacts to a loud conversation or a ringing phone seems like the ultimate tech solution.
However, at Soundmask, our decades of experience in acoustic engineering suggest otherwise. While AI is transformative in many fields, when it comes to the human brain and cognitive health, reactive sound is often part of the problem, not the solution.
The problem with reactive sound
The primary goal of sound masking is to reduce the impact of intrusive noise, including making private conversations unintelligible. For this to work effectively, the masking sound must be part of the furniture. It should be a constant, non-repeating, and—crucially—static background sound.
When an AI system detects a noise spike and raises the masking volume to compensate, it creates a hunting effect. The human ear is biologically programmed to detect changes in our environment. A sound that fluctuates in volume or frequency in response to room activity actually draws attention to itself. Instead of a masking effect that fades into the subconscious, the changing sound becomes another variable for the brain to track. This increases the cognitive load on workers.
Neurodiversity and the static sound floor
The argument against fluctuating AI sound is even more critical when we consider neurodivergent individuals. For workers with ADHD or sensory processing sensitivities, a predictable environment is essential for focus.
Research into stochastic resonance, for example, shows that a consistent, static sound floor can act as a “cognitive prosthetic.” This smoothes out the environment and helps the brain filter out distractions. If the background sound is constantly shifting—ducking and weaving based on an AI algorithm—it disrupts this steady state. For a neurodivergent person, a changing sound floor isn’t a solution. It’s a source of sensory instability that can trigger stress and brain fatigue.
Part of the furniture
Effective sound masking should be invisible. Like a well-designed HVAC system or ergonomic lighting, you shouldn’t notice it’s there until it’s turned off. By engineering a system that is physically integrated into the building’s infrastructure and set to a scientifically calibrated, static level, we provide the brain with a reliable, comfortable acoustic environment.
AI has its place in the modern office, but it shouldn’t be managing the sound you hear every second of the day. To truly protect the cognitive health of office workers, sound masking needs to be a permanent, unchanging foundation—not a reactive, changing intrusion.
To learn more about how a calibrated, static sound masking system can improve your workplace, visit our resources page.
Frequently Asked Questions about Sound Masking
Q: What is the difference between white noise and sound masking?
A: While they sound similar, white noise is a random signal with equal power across all frequencies, often sounding like harsh static. Commercial sound masking is specifically engineered to match the frequencies of human speech, creating a softer, more comfortable spectrum that effectively masks conversations without being intrusive.
Q: Why shouldn’t sound masking levels change throughout the day?
A: The human auditory system is highly sensitive to change. If a masking system is reactive (eg, adaptive or AI-based), the fluctuating volume creates a distraction peak every time the system adjusts. A static sound floor allows for habituation, where the brain tunes out the sound, leading to lower stress and higher focus.
Q: How does sound masking support neurodivergent employees?
A: For individuals with ADHD or sensory processing sensitivities, sudden noises are major cognitive disruptors. Sound masking provides a constant, comfortable background sound that smooths out these peaks. Through a process called stochastic resonance, a steady background sound can actually help neurodivergent brains maintain a stable state of focus.
Q: Can sound masking help with traffic noise in a city office?
A: Yes. By raising the internal sound level to a consistent level (usually between 37-43 dBA), sound masking makes external sirens, construction, and traffic noise less jarring. It narrows the dynamic range of the room, preventing the startle response triggered by the body’s HPA axis (see diagram below, source: Getty Images).
Q: What is the ideal “Privacy Radius” in an open-plan office?
A: In an untreated office, speech can be intelligible from over 15 metres away. With a correctly installed and calibrated sound masking system, that radius is reduced to roughly 3 to 4 metres, significantly improving speech privacy and reducing interruptions.