Interactive guide to noise levels: from whisper to jet engine. Learn what different decibel levels sound like and their health impacts.

Why Decibels Are Logarithmic

The decibel scale is logarithmic, not linear. This means that a small increase in dB represents a massive increase in actual sound intensity:

60 dB → 70 dB: 10 dB increase = 10x more intense (conversation → traffic)
70 dB → 80 dB: Another 10 dB = 100x original intensity (traffic → factory)
60 dB → 80 dB: 20 dB total = 100x intensity, perceived as ~4x louder to human ears

WHO Noise Guidelines

Limit: 45 dB (outside), 30 dB (inside)

Higher levels disrupt sleep, causing cardiovascular issues, cognitive impairment, and reduced quality of life.

Limit: 53 dB (outside), 35 dB (inside)

Chronic exposure above these levels increases risk of heart disease, hypertension, and mental health issues.

Above 85 dB: Permanent damage possible

Prolonged exposure above 85 dB causes irreversible hearing loss. Use protection in loud environments (concerts, factories, airports).

Apps like NIOSH Sound Level Meter or Decibel X provide surprisingly accurate readings using your phone's microphone.

Measure at ear height, away from walls, and take multiple readings at different times of day for accurate assessment.

For property decisions, professional acoustic surveys provide detailed analysis including frequency distribution and time patterns.