why the cutoff frequency is taken for 3dB and not other values like 1 or 2 db??

why the cutoff frequency is taken for 3dB and not other
values like 1 or 2 db???

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why the cutoff frequency is taken for 3dB and not other values like 1 or 2 db???..

Answer / shivani

Cutoff frequency is the frequency at which GAIN is reduced
to (1/2)^0.5 of its midband value.
And if we find the gain in dB then it will be equql to 3dB.
Gain(db) = 20log(1/1.41)=3dB

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why the cutoff frequency is taken for 3dB and not other values like 1 or 2 db???..

Answer / syncopator

The 3dB point is useful because it is the point at which
power is one half of the value within the passband of the
device being considered.

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why the cutoff frequency is taken for 3dB and not other values like 1 or 2 db???..

Answer / guru

Human ear can not distinguish between maximum and 3DB
frequency level. 3DB is maximum permitted level,more then
3DB results in noticeable change. It saves power.........

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23 No

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