Does Office Noise Actually Make You Worse at Your Job?

Yes for some work and barely at all for other work, and the variable is meaning rather than volume. Overheard speech impairs tasks requiring you to remember and search for information while leaving simple counting and word generation largely alone. Newer acoustics research found the disruption was substantially higher with meaningful speech than with foreign speech, and that it was largely unaffected by moving sound sources further apart.

So the answer is more specific than yes. It depends which mental operation you are running, and whether you can understand what is being said.

The office noise effect is real and measured

The most-cited experiment is a 2011 study in the Journal of Environmental Psychology by Jahncke, Hygge, Halin, Green and Dimberg. Forty-seven students worked for two hours on tasks involving basic working memory processes in a simulated open-plan office, under either high noise at 51 decibels or low noise at 39, with physiological stress measures and self-reports alongside.

Under higher noise, participants remembered fewer words, rated themselves as more tired, and were less motivated with their work.

Note the size of that difference: 51 against 39 decibels is a normally busy office against a quiet one, not a building site against a library, and it was enough to move memory, fatigue and motivation across two hours.

Which tasks it hits

The practical finding comes from a study in Noise and Health testing which tasks are suitable for open-plan work according to how susceptible they are to the mere presence of irrelevant speech, comparing performance in quiet against speech across tasks tapping information search, remembering material, counting, and word generation.

Tasks requiring episodic memory and rehearsal, such as information searching and word memory, are better performed during quiet. Word fluency, drawing on long-term memory, and simple counting are less susceptible.

The proposed explanation is that automatic processing of irrelevant speech impedes the cognitive processes required to rehearse material you are trying to hold onto. You cannot choose not to process speech, and the machinery that processes it is the machinery you were using.

What newer acoustics research adds

Two findings retrieved for this revision are more actionable than anything in the original version.

A 2023 study in Applied Acoustics investigated the irrelevant sound effect using an auditory-verbal serial recall task under simulated open-plan office acoustics, varying the semanticity of speech, reproduction method and room acoustics.

Its first finding: the effect was exhibited in most conditions with irrelevant non-speech sounds with or without speech, but was substantially higher with meaningful speech compared to foreign speech, suggesting a semantic effect.

Speech you can understand is worse than speech you cannot. That is not a volume phenomenon, and it explains why a café in a language you do not speak can feel workable while two colleagues discussing a project does not.

Its second finding: cognitive impairment was higher in room acoustic conditions with lower sound absorption, while the irrelevant sound effect was largely invariant due to spatial separation of sound sources.

Absorption helps. Distance does not, at least within the range simulated. That runs against the standard open-plan remedy of spreading desks further apart.

A correction to the original explanation

The first version of this article offered an explanation from the researchers: that cognitive tasks encouraged participants to remain attentive and engaged, whereas vigilance tasks were less intrinsically interesting, and that engagement rather than difficulty was protective.

That account has weakened. A 2023 review of noise and cognitive performance research covering 2021 to 2023 reports that increasing task engagement, implemented through increased reading difficulty, does not reduce disruption of reading comprehension by meaningful background speech, thereby contradicting previous research. It adds that another study failed to replicate previous findings that increasing task difficulty reduces disruption.

So the engagement explanation is now contested, and this article no longer leans on it. What survives is the semantic finding, which is better evidenced and more useful.

The same review’s practical conclusion: reducing the acoustic variability and speech intelligibility of background sound should be targeted to maximally reduce its disruption.

What this does not tell you

None of these studies tested noise-cancelling headphones, white noise machines, masking systems or any other purchasable intervention. This site has tested nothing and recommends nothing.

The 2011 experiment used students on laboratory memory tasks for two hours, not professionals doing their jobs across a week. The task categories map onto real work loosely.

And nothing here measures the cumulative effect of years in an open-plan office rather than the effect across an afternoon. This is also a different question from music you choose yourself, where the evidence points at lyrics rather than at meaning more broadly, and from office temperature, where the famous number turned out not to predict much at all.

Common questions

Is overheard conversation worse than other noise?

Yes, and newer work shows it is specifically speech you can understand. A 2023 study using an auditory-verbal serial recall task under simulated open-plan office acoustics found the irrelevant sound effect was substantially higher with meaningful speech compared to foreign speech, suggesting a semantic effect. Earlier work found that tasks requiring episodic memory and rehearsal, such as information searching and word memory, are better performed in quiet, while word fluency and simple counting are less susceptible, with the proposed explanation being that automatic processing of irrelevant speech impedes the rehearsal of material you are holding in mind.

Does moving desks further apart help?

Apparently not, which is the more surprising of the two newer findings. The 2023 acoustics study reports that the irrelevant sound effect was largely invariant due to spatial separation of sound sources in open-plan office simulations. The same study found cognitive impairment was higher in room acoustic conditions with lower sound absorption. So absorption appears to matter and distance appears not to, within the range simulated. A 2023 review of the field concludes that reducing the acoustic variability and speech intelligibility of background sound should be targeted to maximally reduce disruption.

How loud does it have to be?

Less loud than you would guess, and volume is not the main variable. A 2011 experiment compared open-plan office noise at 51 decibels against 39, an ordinary difference between a busy office and a quiet one. Across two hours, participants in the higher noise condition remembered fewer words, rated themselves as more tired, and were less motivated. But the newer acoustics work locates the disruption in whether speech is meaningful rather than in level, and a 2023 review points at speech intelligibility and acoustic variability as the targets. What kind of sound it is matters more than how loud.

Does concentrating harder help you ignore it?

The evidence has moved against that, and this is a correction to an earlier version of this article. A 2023 review of noise and cognitive performance research from 2021 to 2023 reports that increasing task engagement, implemented through increased reading difficulty, does not reduce disruption of reading comprehension by meaningful background speech, contradicting previous research. It also notes that another study failed to replicate previous findings that increasing task difficulty reduces disruption. So the idea that a sufficiently absorbing task protects you against overheard speech is not currently supported.

Sorting work by sound, not sound by loudness

The instinct with office noise is to attack the volume: quieter room, better door, higher partitions, something in your ears.

What the research keeps pointing at is meaning. Speech is disruptive because it gets processed whether you want it to or not, and the newer acoustics work shows the disruption tracks whether that speech carries meaning you can extract. Foreign speech is measurably less disruptive than your own language. Spatial separation did not reduce the effect; sound absorption did.

That reframes both the individual and the architectural question. Spreading people out is the standard response and the evidence does not support it. And on your side of the problem, the tasks that involve holding something in your head, tracing an unfamiliar codebase, drafting, reading closely, are the ones the evidence says to protect, in the same way that reading on a screen costs most under time pressure. Concentrating harder is not the fix; the evidence for that has failed to replicate.