Which do you need?

Soundproofing or sound masking?

They sound similar, they cost very different amounts, and they solve different problems. Here is a plain-English guide to which is right for your office.

Quick Answer

If the problem is overheard speech, people in the corridor or the next room hearing what’s said in a meeting, sound masking is almost always the cheaper, faster, and less disruptive answer.

If the problem is intrusive noise, traffic, plant rooms, neighbouring tenants, or a noisy gym below, soundproofing is what you actually need. Masking will not help.

For most office speech privacy problems in the South of England, the right answer is masking. Where partitions are unusually thin or doors fit badly, the best result usually comes from both: minor construction repairs plus masking on top.

Comparison

What each one actually does

The two interventions tackle different physics, so they solve different problems.

Soundproofing...

Tries to block sound from passing between two spaces. It does this by adding mass to walls, sealing gaps, decoupling layers, upgrading doors, and fitting heavier glazing. Done well, it reduces the sound level on the listener’s side of the partition by 10–25 dB. Done partially, it often does very little, because sound flanks around the upgraded element and finds the weakest path (typically a door, a vent, or a partition that doesn’t go all the way to the slab).

Sound Masking...

Accepts that some speech will arrive at the listener through whatever construction is in place, and adds a calibrated low-level noise to the listener’s space. The arriving speech now sits at roughly the same level as the masking, so the brain can no longer extract intelligible words from it. The conversation continues; it just becomes indistinguishable from the background. See the science for the physics, and the glossary entry on STI for the metric used to measure the effect.

Looking further

Side-by-side comparison

Indicative figures for a typical UK SME office; your actual costs will depend on layout, construction, and scope.

Soundproofing

Sound Masking

What it does

Reduces the sound level passing between two spaces using construction.

Raises the noise floor in the listener’s space so arriving speech is not intelligible.

When it’s right

When the problem is intrusive noise: traffic, music, machinery, neighbours. Or when speech privacy must be achieved in a courtroom-style setting where any audible voice is unacceptable.

When the problem is overheard speech in offices, meeting rooms, treatment rooms, or open-plan space. Most regulated SME offices fall here.

Worked example (two rooms with shared partition, corridor masking)

Approximately £14,000 (order-of-magnitude estimate based on our experience of similar partition upgrades, sealed doors, and redecoration).

£1,410 ex-VAT for the DIY kit, self-installed. See the full scenario.

Time on site

One to three weeks of construction per room, including dust, decorating, and reinstatement of finishes.

Half a day to two days per zone, with no construction and no dust.

Lease implications

Usually requires landlord consent and reinstatement at lease end.

Generally falls within tenant fit-out rights; the equipment is removable.

Effect on intrusive noise (traffic, plant)

Significant reduction.

None, this is the wrong tool for that job.

Effect on speech privacy

Significant if every flanking path is properly addressed; often partial in practice.

Designed specifically to defeat speech intelligibility; reliable when calibrated to a target STI.

→ Soundproofing

What it does: Reduces the sound level passing between two spaces using construction.

When it’s right: When the problem is intrusive noise: traffic, music, machinery, neighbours. Or when speech privacy must be achieved in a courtroom-style setting where any audible voice is unacceptable.

Worked example (two rooms with shared partition, corridor masking): Approximately £14,000 (order-of-magnitude estimate based on our experience of similar partition upgrades, sealed doors, and redecoration).

Time on site: One to three weeks of construction per room, including dust, decorating, and reinstatement of finishes.

Lease implications: Usually requires landlord consent and reinstatement at lease end.

Effect on intrusive noise (traffic, plant): Significant reduction.

Effect on speech privacy: Significant if every flanking path is properly addressed; often partial in practice.

→ Sound Masking

What it does: Raises the noise floor in the listener’s space so arriving speech is not intelligible.

When it’s right: When the problem is overheard speech in offices, meeting rooms, treatment rooms, or open-plan space. Most regulated SME offices fall here.

Worked example (two rooms with shared partition, corridor masking): £1,410 ex-VAT for the DIY kit, self-installed. See the full scenario.

Time on site: Half a day to two days per zone, with no construction and no dust.

Lease implications: Generally falls within tenant fit-out rights; the equipment is removable.

Effect on intrusive noise (traffic, plant): None, this is the wrong tool for that job.

Effect on speech privacy:

In reality...

They often work best together

The clearest sign that you need both is a meeting room where the partition reaches the suspended ceiling but not the structural slab above. Sound from the meeting room rises into the ceiling void and then falls into the corridor or the next room over the top of the partition. Construction can fix this (extend the partition to the slab) but is disruptive. Masking can fix it more cheaply by adding maskers (small ceiling speakers) in the listener’s space, but it does not address the root cause.

The most cost-effective answer is usually a combination: minor construction repairs to seal the worst flanking paths, plus a masking system in the listening space to handle the residual speech that gets through. Done together, the cost is usually lower than the construction-only path needed to achieve the same outcome.

FAQs

Common questions

Is it the same as white noise?

No. White noise has equal energy at every frequency; a speech-privacy masking signal is shaped to peak in the speech band (about 300 Hz to 4 kHz) and roll off above and below. The shaping is what makes it effective at concealing speech without sounding like a hiss. See pink noise in the glossary.

Will masking stop noise from a noisy neighbour or street outside?

No, that is a soundproofing problem. Masking lifts the noise floor inside the room; it does not reduce the level of sound coming through the wall. If your problem is a loud cafe, gym, or main road outside, you need partition or window upgrades.

Can I do both soundproofing and sound masking?

Yes, and many offices do. Construction handles the bulk of the sound reduction; masking handles the residual intelligible speech that construction cannot economically eliminate. The combination is often cheaper than the construction-only path that would achieve the same privacy outcome.

Does masking satisfy GDPR or FCA confidentiality requirements?

Speech privacy is one demonstrable technical control toward those obligations, but installing masking alone is not the whole answer. Regulators expect a layered approach, physical, technical, and organisational measures together. See your sector for what each regulator looks for.

How long does a masking installation take?

Most SME installations are complete inside one to two working days. Self-install kits typically take an afternoon per zone. Soundproofing a single meeting room generally takes one to three weeks of construction time including dust, decorating, and reinstatement.

Will I notice the masking sound?

Visitors rarely notice it. Those who do almost always stop registering it within a few minutes. Inside a meeting room being masked from the outside, the sound is not present at the listener’s ears at all unless that room is itself being masked from another adjacent room. See the main FAQ for more on what it sounds like in practice.

Cost Calculator

Get a budget figure for your office

Use the online estimator for an indicative cost based on room dimensions, ceiling type, and number of zones, takes about two minutes. If you’d rather talk it through, our customer service team will respond within one business day.

Alternatively, talk to customer service or see five real office layouts.