Home-office acoustics in a Luxembourg apartment, without rebuilding anything

The noise that ruins a call is rarely the street. In the housing stock most people rent and buy here, it comes through the structure, and the remedies are furnishing decisions rather than construction ones.

Two different problems, frequently confused

Reverberation is your own voice bouncing off hard surfaces. It makes you sound distant on a call and makes a room tiring to work in. It is entirely solvable with soft furnishing.

Transmission is sound arriving from elsewhere: footfall from above, the lift shaft, the water risers, a neighbour's washing machine. It is a property of the building and largely not solvable by a tenant or an individual owner.

Establishing which you have determines whether the answer is a rug or a different room. Stand in the candidate room with the window closed and stay silent for thirty seconds. What you hear in that silence is transmission; what you hear when you speak is reverberation.

Why this matters more in Luxembourg's older stock

The converted townhouses that dominate Limpertsberg, Belair and the Gare district frequently have timber floors and little acoustic separation between units. That transmits considerably more than the street does, and it runs in both directions: you hear the apartment above, and the apartment below hears you.

Newer buildings in Kirchberg and Cloche d'Or generally perform better on structure and can be harder on reverberation, because large glazed areas and hard floors produce a live room.

Neither is a fault; they are different problems requiring different responses.

The five furnishing changes that work

• A rug, ideally with underlay. The single most effective change available, and in an apartment with timber floors it also reduces what the neighbours below hear.
• Curtains, heavy and hung outside the window reveal so they clear the glass when open. Soft mass on the largest hard surface in most rooms.
• A bookcase with books on it, on the wall you face or the wall behind you. Irregular mass scatters sound better than any flat panel.
• Felt pads under every chair and table leg. Trivial, and it removes the impact noise that generates most complaints in this housing stock.
• A soft surface on one wall, whether a hanging, a pinboard or an upholstered panel. One wall is usually enough.

Where to put the desk

Position matters as much as treatment. Avoid a wall shared with the lift shaft or the water risers, which you can identify by noting where the kitchen and bathroom sit relative to the neighbouring lots on a floor plan.

Avoid facing a large hard surface with nothing between you and it, since that is what produces the echo on a call. And avoid sitting under the room directly below a neighbour's living area if you have a choice, since footfall is the transmission most people find hardest to ignore.

A corner with two soft surfaces near it outperforms the middle of a larger room, which is counter-intuitive and consistently true.

What is not yours to change

In a copropriété, the structure, floors between lots and the facade are common parts. Improving acoustic separation between apartments is not a tenant's project and, for an owner, work touching the structure requires the general assembly's authorisation, with improvement works needing an absolute majority of all millièmes, present or not.

Glazing addresses traffic noise and not structure, and in most Luxembourg apartments the windows form part of the common parts, so replacing them is not a unilateral decision either.

That is why the room choice, made at the viewing, matters more than anything you can do afterwards.

The neighbour dimension, which cuts both ways

Working from home means being in the apartment during hours when the building is otherwise quiet, and calls carry.

Permitted hours for noisy activity are set by each commune's règlement général de police and are not identical across the country, so check your own commune. Inside the building, enforcement runs from the syndic to the owner and then to the tenant, and a resident who generates two such letters has created a problem for their landlord.

The practical mitigation is the same as the acoustic one: a rug, felt pads and a desk positioned away from a shared wall.

What to check at a viewing

Four things, all of which take a minute. Thirty seconds of silence in each candidate room with the window closed. The floor construction, timber or concrete, which you can usually establish by walking on it. Where the kitchen and bathroom sit relative to the neighbouring lots, which tells you where the risers run. And whether a bedroom or study backs onto the lift shaft.

Then ask directly what is directly above. A room under a kitchen or a living area is a different proposition from one under a bedroom.

Three questions we are asked

Do acoustic panels work? For reverberation, yes, and a bookcase and a rug generally achieve as much for less. For transmission, no.

Are headphones a substitute? For what you hear, largely. For what your microphone picks up from a live room, not at all, which is why the rug matters even with good headphones.

Should acoustics influence which apartment I choose? Yes, more than most people weight it, because transmission is a permanent property of the building and it is the one thing on this list you cannot fix afterwards.

Testing a room before you commit to it

Three tests, each under a minute, and together they tell you almost everything.

The silence test. Window closed, stand still, thirty seconds. Anything you hear is transmission and it is permanent.

The clap test. One sharp clap. A ringing tail means a live room and reverberation, which is solvable with soft furnishing. A dead sound means the room is already adequately furnished.

The call test. Where the agent allows it, record thirty seconds of yourself speaking on your phone at the desk position and listen back. It is the closest available simulation of what colleagues will hear, and it frequently contradicts the impression formed standing in the room.

Run all three in every candidate room rather than only the one you assume will be the office. In converted stock the quietest room is often not the largest, and it is worth knowing before the furniture is arranged.

When the answer is a different room, or a different apartment

Transmission cannot be fixed by an occupant, so where the silence test produces a room you would not want to spend two hundred days in, the honest response is to change the room rather than to buy treatment.

Test every room at the viewing, not only the one you assume will be the office. In converted stock the quietest room is frequently the smallest, at the back, away from the stairwell and the risers, and it is often dismissed as a box room before anyone has stood in it.

Where no room in the apartment passes and hybrid work is a fixture of your week, that is a reason to keep looking. It is a permanent property of the building, it will be there for as long as you are, and in a purchase it will still be there when you come to sell.