Howtosignalprocessing
- How do you understand decibels?
- Is 60 decibels twice as loud as 50?
- What is the 3 dB rule?
- How loud is 20 dB?
How do you understand decibels?
On the decibel scale, the quietest audible sound (perceived near total silence) is 0 dB. A sound 10 times more powerful is 10 dB. A sound 100 times more powerful than near total silence is 20 dB. A sound 1,000 times more powerful than near total silence is 30 dB, 40 dB and so on.
Is 60 decibels twice as loud as 50?
Thus, 60 dB are perceived as twice as loud as 50 dB. Therefore, in noisy environments it is very important to protect one's hearing to tampen dB levels from a dangerous level to a safe level.
What is the 3 dB rule?
3 dB rule: A 3 dB gain means twice (x2) the power. A 3 dB loss means half the power. For example, a system with 40 watts of input power and a 6 dB insertion loss will only have 10 watts of output power. dB: Decibel, a logarithm (equal to 10 times) ratio of the difference between two values.
How loud is 20 dB?
20 dB: Whispering from five feet away. 30 dB: Whispering nearby. 40 dB: Quiet library sounds. 50 dB: Refrigerator.
