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The normal threshold of hearing is around .

The normal threshold of hearing is around . Correct Answer 25-45 db

শব্দ শোনার স্বাভাবিক সীমা হলো ২৫ - ৪৫ db। ডেসিবল (db) হলো শব্দের তীব্রতা পরিমাপের একক। মানুষ সর্বোচ্চ ১৪০ ডেসিবল শব্দ সহ্য করতে পারে। ১৫০ db কানের পর্দা ফাটিয়ে দিতে পারে এবং ১৮০ - ২০০ db শব্দ মৃত্যু ঘটাতে পারে।

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