Environment & Ecology · Environmental Studies
सामान्य बातचीत में ध्वनि का स्तर लगभग कितने डेसिबल होता है?
- 190 से 100 dB
- 230 से 60 dB✓
- 310 से 20 dB
- 40 से 10 dB
सही उत्तर देखें
30 से 60 dB
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