The noise you no longer hear — but which still tires you

I promised noise. But not the kind you are thinking of — not a drill behind the wall. I mean the noise we stop hearing, yet which continues to work against us.

Do you know the feeling of being strangely exhausted after an entire day at home, even though “nothing happened”? The refrigerator. Ventilation. The street outside. Notifications. Each of these sounds is harmless on its own. But the brain has no “ignore” button — even when we stop hearing them consciously, it continues to process them. Quietly, they take away the energy we need for what matters to us.

Science calls this a load, not simply noise. The Healthy Buildings team at Harvard University placed acoustics among the nine foundations of a healthy building because prolonged background noise is associated with poorer concentration, higher stress and greater difficulty falling asleep. Quiet is not a luxury. It is a condition for recovery.

Again, no renovation is required to change something. Soft curtains, a rug, a bookcase against the neighbour’s wall, a phone silenced in another room at night. Sound is absorbed by softness. The more hard, empty surfaces there are, the more echo there is and the louder the background becomes.

Today’s question: sit in your room this evening and simply listen for one minute. How many sounds can you hear that you usually do not notice?

Next Thursday: thermal comfort — why “too warm” and “too cold” cost more than we think.