Noise peaks rather than averaged doses drive human annoyance and harm

Evidence

To measure exposure to traffic, usually the noise dose is averaged over 24 h, and this contrasts with the principle that the highest noise level and the noisiest event are the proxies of human pathologies. It seems apparent that the annoyance increases with the increase of noise peaks. When traffic barriers are erected we do not always observe improvement in the annoyance reaction because the background noise is significantly reduced, but not the noise peaks, which persist although sonic barriers are present. For example, when the traffic noise is continuous this has less effect on the concentration of schoolchildren than sudden noises such as those produced by aircraft. Peaks are more difficult to shield than continuous sounds. — Almo Farina, Soundscape Ecology, 1030

Categorization

• XREF: Bolsters the reader’s earlier claim about the City of London’s failure to improve the sonic environment despite quiet pavements and barriers — acoustic design that ignores peaks fails. — connects to: Low-frequency urban noise that meters underestimate may harm health most — Almo Farina, Soundscape Ecology: Principles,…, 1499; Noise combines measurable harm with subjective disturbance; Noise research shifted from hearing-loss risk to subjective annoyance (+4 more)
• SEED: Could ground a piece on why ‘quiet streets’ programs underdeliver: loud peaks dominate perception no matter how well the background is muffled.

Broader Connections

• Noise damage accumulates as an integrated dose where loudness trades against duration #contradicts (0.85)
• Noise combines measurable harm with subjective disturbance #expands (0.80)
• Noise research shifted from hearing-loss risk to subjective annoyance #expands (0.75)
• Sharpness, roughness, and narrowband temporal components increase noise annoyance #expands (0.75) — Ville Pulkki, Matti Karjalainen, Communication Acoustics- An…, 2491
• Noise exposure permits trading louder sounds for shorter duration within a fixed dose #contradicts (0.75)
• Annoyance ratings can be predicted from measurable hearing sensations. #expands (0.70)