Identify the sound and when it occurs

The WHO Environmental Noise Guidelines for the European Region review health evidence for environmental sources such as road, rail, and aircraft traffic, wind turbines, and leisure activities. At home, keep a short log of the sound, its timing, and whether it seems to come through a window, through a wall or floor, or from vibrating equipment. Airborne noise, impact noise from footsteps or doors, and mechanical vibration travel differently and may need different remedies. A phone sound-meter app can help compare periods, but its reading is not a regulatory measurement or a professional assessment.

Absorption does not equal sound isolation

Curtains, rugs, and acoustic panels may reduce reflections inside a room; they do not guarantee that low-frequency sound through a building structure or impact noise from another unit will be blocked. For outdoor noise, inspect likely air paths such as window seals, door gaps, and vents. In a rental, ask the property manager before altering windows or ventilation; do not block vents to reduce noise. Wall and floor isolation depends on the building assembly and workmanship, so identify the transmission path with a qualified acoustics professional before paying for materials that may address the wrong problem.

WHO guidance is not a home renovation specification

The WHO guideline is a regional public-health assessment of environmental-noise exposure and health evidence, developed for the WHO European Region. It should not be treated as a universal indoor decibel limit for an apartment or a performance guarantee for a soundproofing product. WHO/Europe’s noise information describes population-level concerns including sleep disturbance, cardiovascular effects, and hearing impairment; it does not diagnose why one household is bothered or decide a local legal nuisance case. Check the noise rules and measurement process with the authority in your jurisdiction.

Expert perspective and health limits

WHO describes possible health impacts of noise, while actual exposure and effects vary with source, timing, duration, and the individual. Before renovating, document when the sound occurs and inspect doors, windows, and shared building elements with the landlord, building manager, or an acoustics specialist. This can prevent buying absorptive products when the problem is sound transmission. Persistent ringing in the ears or concern about hearing damage after loud exposure warrants clinical advice; adding insulation is not a substitute for care. This overview explains the scope of WHO material and does not set an individual safe-exposure threshold.

The Association of Noise Consultants and Institute of Acoustics explain in their 2020 residential design guide that closing windows to limit outdoor transport noise can conflict with ventilation and overheating control. Any work on window gaps or vents should therefore consider fresh-air provision and indoor temperature alongside noise. The guide mainly addresses new dwellings exposed to airborne transport noise; it does not demonstrate a fix for footsteps or equipment vibration in an existing apartment, or guarantee a post-renovation decibel reduction.

Sources and references: Environmental noise guidelines for the European Region | WHO / Noise | WHO Regional Office for Europe / Acoustics, Ventilation and Overheating: Residential Design Guide | Association of Noise Consultants and Institute of Acoustics