This is not just a matter of acoustic discomfort, but a real business problem. Research shows that continuous noise reduces work efficiency, increases stress levels, and impairs employee well-being, while a lack of acoustic privacy demotivates and lowers job satisfaction. From an ROI perspective, improving office acoustics can quickly pay off – shorter distraction times, fewer errors and work interruptions, and lower employee turnover translate into tangible financial benefits. In this guide, we will examine why noise is a "silent killer" of productivity and what specific steps can be taken to restore peace and focus in an open-space office.

Why is noise a silent killer of productivity?

Office noise has a real, measurable impact on team work efficiency. According to Steelcase/Ipsos research, the average worker in an open space loses up to 86 minutes a day due to disruptions caused by noise and conversations. That is as if more than 1.5 hours of work effectively "disappeared" every day! No wonder that in a global survey, as many as 85% of people were dissatisfied with acoustic conditions, and 31% admitted they have to leave the office to complete their tasks in peace. Noise reduces the ability to concentrate – employees in loud environments have shorter attention spans and make more mistakes (a similar problem of lack of focus and noise affects education, which we described when analyzing classroom acoustics). What is worse, returning to an interrupted task takes a very long time: research by the University of California, Irvine, showed that after a typical distraction, it takes an average of 23 minutes to return to full focus. If there are many such distractions throughout the day, it is easy to calculate how many hours of productive work are lost every week.

It is not just about subjective feelings – the effects of noise are confirmed by hard data and scientific experiments. In an experimental study of an Activity-Based Working (ABW) environment, it was found that moving work from a loud open-space zone to a designated quiet zone improved cognitive test scores by 16.9%, and to a private room by up to 21.9% – which corresponded to the difference in noise levels (~15 dB(A) quieter outside the open space). This is tangible proof of how silence translates into better efficiency. Cognitive psychologists have even described a phenomenon known as the "irrelevant speech effect" – simply listening to someone else's conversation in the background significantly reduces memory and the ability to absorb information, because our brain involuntarily processes the heard words.

Long-term noise also affects the physiology and health of employees. Constant sound stimuli trigger a stress response in the body. Studies indicate that working in an environment of conversations (~50 dB) can raise heart rate and stress hormone levels, disrupting the rhythm of the nervous system. What is more, chronic noise of moderate intensity (e.g., typical 50–70 dB(A) in an office) evokes a hormonal response similar to other stressors – elevated levels of cortisol (the stress hormone) are observed, especially in noise-sensitive individuals. Scientists cited by Scientific American explain that excess cortisol impairs the functions of the prefrontal cortex of the brain (responsible for planning, problem-solving, and emotional control). In the long run, noise can therefore translate into deteriorating health – elevated blood pressure, sleep problems, and greater susceptibility to professional burnout. No wonder a noisy environment is sometimes cited as one of the reasons for "quiet quitting", the silent withdrawal of employees from engagement in their duties.

It is worth noting that the typical noise level in an office (50–60 dB(A)) is far from the harmful threshold defined in OHS regulations – for example, the EU noise directive sets a limit of 87 dB(A) for an 8-hour exposure and action thresholds starting from 80 dB(A). Offices rarely reach values above 70 dB, and yet even at 50 dB, the cognitive decline effects described above occur. This shows that the problem is not a threat to hearing, but a decline in productivity and comfort at noise levels formally considered "safe." In other words – OHS standards protect us from industrial noise, but in intellectual work, silence and the ability to focus also matter.

What is most disruptive in the office? Sources of noise in open spaces

The main culprit of distractions in the office is… other people. Studies consistently show that background speech from coworkers is the most distracting factor in an open space. Our brain cannot "turn off" language – when we hear intelligible words, they automatically grab our attention and interrupt the internal "voice in our head" that we use for thinking. The more clear and intelligible the speech in the environment is, the greater the interference with our working memory (this is the essence of the irrelevant speech effect). That is why continuous phone calls or discussions behind your back can successfully ruin a workday. Worse still, in an open space, even if you are not participating in a conversation, you become its involuntary listener – there are no walls, doors, or ceilings to absorb the sound, so every word travels far.

The second category of distractors is sudden, unusual sounds, so-called deviant sounds. This could be a ringing phone, a loud notification sound, a printer alarm ending a job, or someone loudly moving a chair. Such sudden stimuli instantly hijack our attention because the brain interprets them as potentially important (this is an atavistic reaction to sudden signals in the environment). Even if the noise lasts only a second, concentration has been broken – and again, it takes time to get back to it.

We must also not forget about the "background noise" generated by office equipment and infrastructure. Noise from HVAC systems (ventilation, air conditioning), the monotonous hum of computers, office devices, and footsteps on a hard floor – all this creates an acoustic floor that may seem insignificant but raises the overall noise level. Especially low-frequency humming from devices is often indicated as a tiring and stress-inducing factor (noise-sensitive people feel it more acutely). In an open space, these sounds add up – several sources at once create a continuous din.

The layout and decor of the open space itself further compound the noise problem. Open space amplifies reverberation and facilitates sound propagation – the absence of absorbing walls and ceilings causes voice and sounds to bounce repeatedly. Smooth, hard surfaces (glass, concrete, bare walls) act as acoustic mirrors: they reflect sound waves instead of dampening them. As a result, a conversation between two people can be clearly heard many meters away, and numerous reflections add to the general noise. Reverberation is the phenomenon of multiple reflected waves overlapping – a space with long reverberation "sounds" louder and less clear because sounds overlap, creating a hard-to-understand din. 

Unfortunately, fashionable minimalist office design – concrete ceilings, glass walls, open ceilings, hard floors – promotes reverberation because it lacks sound-absorbing materials. For example, bare glass or concrete have very low sound absorption coefficients, while soft materials (carpeting, mineral wool panels) can absorb most of the acoustic energy. The less absorption, the longer the reverberation time (RT60) and the greater the range of the noise. This is why modern offices often look beautiful, but acoustically "ring" – all sounds bounce and carry throughout the entire hall.

In summary, noise in an open space is a mixture of conversations, device sounds, and poor room acoustics. Employees subjected to such conditions experience fatigue, frustration, and a drop in motivation. Fortunately, there are effective ways to solve this problem – from simple organizational measures to advanced architectural solutions. Below we present comprehensive strategies for combating noise that will allow you to regain peace and concentration in an open-space office.

How to combat noise – strategies for improving office acoustics

Effective noise reduction in an open space requires a two-pronged approach: on one hand, introducing organizational and cultural solutions (so-called soft measures), and on the other – modernizing the space acoustically (hard solutions). It is important to treat office acoustics as an element of employee well-being and business efficiency, not just an aesthetic issue. Below we discuss both categories of solutions.

Organizational solutions (soft)

• Office noise etiquette: Establish and enforce basic rules of an acoustic work culture. For example, “make phone calls in designated meeting rooms or booths”, “mute notifications in the open space”, “speak in a tone appropriate for a shared space”. Clear rules reminded to employees (e.g., in the form of an infographic on the wall) will help build awareness that silence is a shared value. Educate the team that loud behavior has real consequences for colleagues and company results.
  
  

• Quiet zones and space for focused work: If possible, designate a quiet zone in the office – a separated area (or a separate room) for work requiring concentration, where loud conversations and calls are prohibited. This could be a small “library” with a few desks or a section of the open space separated by partitions. It is important that this is clearly marked and respected. Employees will gain a space to retreat to and work in peace on difficult tasks. Research shows that providing such an option realistically increases efficiency (by the aforementioned ~16–22%).
  
  

• Meeting policy and “focus time”: Analyze the meeting culture in the company – does every quick discussion really need to take place ad hoc at desks? Introduce good practices: limit spontaneous meetings in the open space, encourage booking rooms or using text messengers. You can also designate hours or days without meetings (e.g., Wednesday as a day of focused work for the entire team). Such blocks of uninterrupted time allow everyone to do deep work. Meta-analyses show that companies introducing “no-meeting days” report an increase in productivity and a decrease in stress. Additionally, focus time scheduled in calendars (e.g., daily 9–11 silence) sets expectations – during this time, we avoid unnecessary conversations.
  
  

• ANC headphones as a temporary aid: Encourage employees to use active noise-canceling (ANC) headphones when they need deep concentration. Modern headphones effectively mute ambient noise. Of course, this is not a cure-all – we do not want a culture of mandatory “working in headphones” all day long – but as temporary support, it can be very valuable. It is important to treat headphones as complementary to other actions (they alone will not improve acoustics in the whole office, but they will help the individual).
  
  

• Thoughtful placement of teams and workstations: Try to locate employees performing quiet, focused tasks far from noise sources. If part of the team mainly programs, analyzes data, or writes – it might be worth moving them to the end of the hall or to the aforementioned quiet zone. On the other hand, departments like call centers, sales, or customer service (where there is a lot of talking) should be near meeting rooms or exits, so they can easily step out into the hallway. The goal is to minimize conflict between those who must speak and those who need silence. It has been proven that such spatial segregation of tasks can increase employees' cognitive results by more than ten percent. The layout of the open space itself also matters – avoid setting up desks directly opposite each other in a large space (as this creates long “sound corridors”). It is better to break the line of sight – for example, by arranging desks in a slight zigzag or adding dividers between them.

Technical and architectural solutions (hard)

When it comes to the physical adaptation of space, the priority is to improve the acoustic properties of the room – so that the environment itself amplifies noise less. Key elements are sound-absorbing features (ceiling, walls, soft carpets) and solutions that block or isolate noise sources (partitions, booths). Below is an overview of the most important technical solutions:

• Acoustic ceiling – absorption “from above”: The ceiling is usually the largest flat surface in an office from which sound reflects. Therefore, ceiling adaptation yields the greatest effect in reducing reverberation. If the office has a modular suspended ceiling, it is worth replacing the tiles with acoustic ones (absorption class A, with an NRC of 0.8–0.9+). Such panels will absorb most speech sounds reflecting upwards, shortening reverberation time and improving speech intelligibility. In the case of an open (concrete) ceiling, a good solution is hanging ceiling islands or acoustic baffles – these are panels made of sound-absorbing material suspended below the ceiling (horizontally as islands or vertically as baffles). They diffuse and absorb sound coming from various directions, thereby limiting both reverberation and the “radius of distraction” of conversations (the range within which someone's speech is clearly heard).
  
  The best islands/baffles made of mineral wool or melamine foam achieve very high absorption parameters – NRC of up to 0.9–1.0 in the speech spectrum. This means they absorb almost 100% of the sound falling on them instead of reflecting it back. Installing such structures "from above" reduces the energy of the reverberant field in the room – noise does not bounce endlessly between the hard ceiling and the floor, but is largely absorbed by the panels. This translates into a perceptibly lower background noise level and a smaller range of speech distraction. Practice shows that an acoustic ceiling is fundamental – if we have a limited budget for adaptation, investing in ceiling absorption will yield the widest effects.
  
  

• Wall panels – absorption and diffusion on walls: Bare, large walls in the office should be covered with acoustic panels to capture part of the sound reflections “sideways”. Various types of panels are available – flat fabric-wrapped panels or three-dimensional structural panels.
  
  Flat panels made of foam, wool, or PET focus mainly on absorbing medium and high frequencies (i.e., the speech spectrum), thereby shortening reverberation and reducing reflections between parallel walls. They are especially effective for first reflections – meaning it is worth placing them where, for example, a voice would bounce directly off a large empty wall toward workstations. 3D panels (often with an irregular surface) introduce an element of sound diffusion in addition to absorption. The irregular texture of such a panel causes the reflected sound wave to break into smaller fragments and disperse in different directions instead of focusing on one point. This helps eliminate the “gymnasium effect” – sound does not “focus” in one place but is more evenly dispersed and decays faster.
  
  3D panels are particularly useful for large glazed surfaces or long corridors, where they minimize the focusing of noise. Note: even simple visual barriers (e.g., cubicles, partition walls) can help slightly – as a Steelcase study showed, adding even thin partitions (so-called cocoons) improved employees' ability to maintain attention, as even the psychological privacy effect reduces distraction. Therefore, partitions should be used not only for acoustics but also so that everyone does not have all office movement in their line of sight.
  
  

• Soft flooring – carpet tiles: Although the ceiling and walls are more important for speech, the floor also plays an acoustic role. Hard floors (tiles, concrete, laminate panels) reflect sound and easily transmit impact noise (footsteps, clicking heels, moving chairs). In contrast, carpet tiles – especially carpet tiles with a thick, foam backing – act as a massive absorber on the floor. It dampens the sound of footsteps and reduces reverberation by absorbing part of the sound waves right at the floor level. Additionally, carpeting improves insulation between floors, so if there is another space above the office, sounds do not "carry" as much through the ceiling. Research by manufacturers and acousticians shows that floors with a sound-absorbing layer can significantly reduce noise levels in highly trafficked transit paths. Even if we cannot replace the entire floor, it is worth considering acoustic rugs or mats in key areas (e.g., under chairs in conference rooms or in relaxation zones) to at least partially cut down reverberation.
  
  

• Partition walls, dividers, and phone booths: Physical division of space is an effective way to limit the spread of noise. Even if we cannot erect permanent walls, mobile acoustic screens on wheels and desk-mounted screens attached to desks are available. Such solutions provide an immediate “block & absorb” effect – they create a barrier in the path of the sound wave and simultaneously absorb it, thereby reducing direct speech intelligibility between workstations.
  
  It is important to choose screens made of acoustic materials (e.g., a high-density foam core covered with fabric) – decorative plexiglass screens will not help. A good practice is setting up screens along the main aisles/corridors in the open space so that sound does not spill freely across the entire hall. Another solution is enclosed acoustic booths – single cabins for phone calls or small meetings. Modern booths offer insulation at a level of 30 dB (acoustic class A/A+ according to ISO 23351-1), which means they practically eliminate speech transmission to the outside. An employee entering such a booth has full privacy, and their conversation does not disturb anyone in the open space. This is a highly effective way to “suck” conversation noise out of the open space – instead of silencing people (which can be unrealistic), we give them a comfortable place for a loud call or Zoom meeting.
  
  Setting up just 1–2 booths per 50 people can significantly relieve the rest of the team. It is worth starting with a pilot: install one booth and see how intensively it will be used (usually it turns out to be almost non-stop).
  
  

• Sound masking: An interesting technological solution to the noise problem is sound masking, which is masking speech with a controlled background noise. Paradoxically, adding an additional, neutral sound to the office can make the space feel quieter. The masking system emits a specially designed noise (resembling a gentle hum of air conditioning) through hidden speakers, which drowns out part of the speech sounds. When colleagues' conversations become less intelligible against this background noise, they stop being so distracting – the brain ignores them since it does not pick out clear words. Masking shortens the “radius of distraction” – meaning the distance within which someone's conversation is able to draw attention away.
  
  A well-designed masking system is nearly inaudible (it blends into the background, not sounding like a radio or air conditioner, but rather like a gentle hum that soon becomes unnoticed). Studies by Herman Miller and Harvard Business Review have shown that implementing masking can increase productivity by up to 38% and simultaneously reduce perceived stress by 27%. In many offices, sound masking has proved to be the missing piece of the acoustic puzzle – especially where space cannot be built up or enough panels cannot be added, masking provides acoustic privacy in an open area. Importantly, this technology is relatively inexpensive and quick to implement (much cheaper than, for example, rebuilding walls). Combined with the above organizational and adaptive measures, it yields excellent results.

ROI and business arguments – does it pay off?

Implementing the above solutions is an investment that has solid business justification. For management, specifics are key: will a quieter office translate into better results? Available data and case studies say clearly – yes, and in many areas.

• First, recovered working time: If noise takes away an average of 86 minutes a day per person, reducing this loss by even half gains ~7 hours of work per week per employee! Across a team or the entire company, this is a massive difference. Just shortening the time to return to focus by a few minutes after each interruption yields hundreds of hours more per year for key tasks. And the aforementioned ABW studies showed a 16–22% increase in efficiency after providing quieter conditions – that is like "recovering" the work of one full-time equivalent from every 5-person team thanks to better acoustics.
  
  

• Second, quality of work and fewer errors: Quieter offices translate into fewer mistakes, higher levels of creative thinking, and faster execution of cognitive tasks. Employees are simply able to work in "flow" instead of switching attention every moment. This means better quality projects, satisfied clients, and fewer costly corrections.
  
  

• Third, health and absenteeism: Noise reduction = stress reduction. Fewer people will experience burnout, and the number of sick leave days caused by headaches or spikes in blood pressure (correlations of which with noise have been noted) will decrease. A satisfied, well-rested employee works more efficiently and gets sick less often. This reduces the hidden costs of absenteeism and presenteeism (i.e., being at work in poor health).
  
  

• Fourth, talent retention and work culture: Working conditions have a massive impact on employees' decisions to stay with a company. If the office is friendly, promotes concentration and well-being, people are less inclined to look for a quieter place. In the era of hybrid work, many people prefer to stay home precisely because of office noise – a JLL report found that over 25% of employees cite noise and the inability to focus as the main reason for working remotely. By improving acoustics, you can encourage them to come to the office more often (because it finally gives them what was missing – the ability to focus). Better acoustics also mean less frustration leading to “quiet quitting” – when people feel the company cares about their comfort, their morale is higher. Consequently, turnover and the costs of recruiting replacements decrease.

What about the costs of such improvements? ROI analyses for acoustic solutions look very favorable. For example, individual elements that improve acoustics often pay for themselves within several months if they help us recover even 2–3% of the team's working time. And we are talking about just one solution here – the combined effect of a package of changes (e.g., panels + booths + masking) can bring much more than a 3% improvement in productivity. When we add soft benefits (better collaboration, uninterrupted meetings, better experience for clients who hear less din during phone calls), it turns out that investing in acoustics is among the fastest-yielding investments in employee well-being. Herman Miller estimates a productivity increase of up to 38% after applying appropriate acoustic solutions, and Soft dB calculates that shortening each of the frequent 23-minute post-distraction downtimes by just a few minutes yields huge savings at average wage rates. In short – adaptation costs are one-off, while gains accumulate day in and day out in the form of better team performance.

Where to start? Action plan – quick wins and long-term solutions

Implementing acoustic changes should be planned in stages. Not everything can (or needs to) be done at once – many improvements can be introduced at a low cost in the short term, testing their effect, while major investments can be planned as part of a larger project (e.g., office renovation or future CAPEX). Below is a proposed sequence of actions:

• Quick wins (low cost, immediate effect): Start with steps that cost nothing or very little and can immediately improve the situation. These include, among others, introducing noise etiquette and quiet zones (as described above), enforcing the use of meeting spaces (instead of holding them in the open space), setting up simple desk screens between workstations as a test, purchasing a few mobile acoustic screens and checking where they are needed, piloting 1–2 phone booths on the floor, and even setting default “focus blocks” in team calendars so everyone has planned time for quiet work. These actions can be taken immediately, without lengthy analyses – you will feel their effect quickly, and at the same time, you will gain data on which solutions are most needed.

• Medium horizon (a few months): The next stage involves moderate investments that can be implemented within a few months. Based on observations and noise measurements, decide where a sound masking system will be most useful – e.g., in areas with the most phone calls (high speech intelligibility). Consider rearranging the space layout: can some desks be moved further from corridors, or can a focus zone be separated by partition walls? If you have suspended ceilings, replace some ceiling tiles with high-class acoustic ones where the most people sit (sometimes you don't need to replace all of them at once, e.g., every second tile). Additionally, add ceiling islands or baffles over the noisiest areas (e.g., over the sales department open space or over the daily stand-up area of the IT team). These medium-scale actions require some budget and planning, but they are not as disruptive as a full renovation – they can be done, for example, over a few weekends and immediately bring improvement.

• Long-term (CAPEX strategy): Ultimately, it is worth writing acoustics as a permanent element of office space planning. During a major office modernization or relocation, plan a comprehensive approach: a professional office acoustic audit and acoustic modeling of rooms (analysis of expected reverberation time, speech intelligibility index STI, etc.), and based on this, an adaptation design. Such a project should include a complete set of solutions: a top-tier acoustic ceiling (this is fundamental), walls covered with panels or diffusers, floors made of sound-absorbing materials, appropriate division of space (permanent walls, glass meeting rooms, booths, niches), plus a masking system as fine-tuning. The long-term goal should be reducing speech intelligibility in the open space to approx. 4–6 meters – so that a conversation held a few desks away becomes just background hum, not a distracting dialogue – and shortening the RT60 reverberation time to values recommended for offices (typically 0.4–0.6 s in the speech spectrum). These acoustic parameters are adopted in modern design guidelines and guarantee that the office will support intellectual work. Achieving them requires investment but translates into lasting work comfort for years.

At each of the above stages, measuring the effects and listening to team feedback is crucial. Acoustics may seem like a technical topic, but its perception is subjective – which is why it is worth asking employees if they see an improvement, which areas in the office are still problematic, etc. Sometimes a minor change (such as moving a loud printer to another location) can resolve a specific annoying noise. Other times, it will turn out that an additional booth is needed because one is not enough. A culture of continuous improvement of working conditions will pay off with greater trust and commitment from people.

Acoustic solutions – cost vs. impact (for ROI decisions)

Legend: Relative Cost: Approximate cost of implementing different solutions relative to each other. Impact: ★☆☆ moderate · ★★☆ high · ★★★ very high.