General Knowledge · General Studies
ध्वनि प्रदूषण (स्तर) की माप की इकाई क्या है?
- 1अल्फा-किरण
- 2विद्युत चुम्बकीय
- 3रिक्टर स्केल
- 4डेसिबल✓
सही उत्तर देखें
डेसिबल
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