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Noise measured in decibels is logarithmic; each 10 dB increase represents tenfold intensity increase. Sound level affects hearing and health.
Hướng dẫn từng bước
- 1Decibel scale: 0 dB = threshold of hearing, 130 dB = threshold of pain
- 2Typical: 60 dB (normal conversation), 85 dB (prolonged exposure risky), 120+ dB (hearing damage immediate)
- 3Safe exposure: 85 dB for 8 hours, 90 dB for 2.5 hours
Ví dụ có lời giải
đầu vào
90 dB noise source, 8 hours exposure
Kết quả
Hearing damage risk, hearing protection required
OSHA limit
Lỗi thường gặp cần tránh
- ✕Adding decibels directly instead of converting to intensity
- ✕Assuming short exposures to high dB are safe
Câu hỏi thường gặp
Why is decibel scale logarithmic?
Human hearing perceives loudness logarithmically; equal dB increases sound equal perceptual loudness.
How do you reduce noise?
Source reduction, distance (inversely proportional to distance squared), barriers, or personal protection.
Sẵn sàng để tính toán? Dùng thử Máy tính Noise Decibel miễn phí
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