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???

Question Posted / guest

3 Answers
5816 Views
I also Faced
E-Mail Answers

Answers were Sorted based on User's Feedback

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

Is This Answer Correct ?

25 Yes

4 No

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.

Is This Answer Correct ?

1 Yes

2 No

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.........

Is This Answer Correct ?

2 Yes

23 No

Post New Answer

More Electronics Communications Interview Questions

Explain why the antenna is called passive element?

0 Answers

regarding bsnl jto examination,can i use the printout of application format mentioned in the advertisement.

0 Answers

what is the use of resister in any circuit?

3 Answers

I have applied for the post of Assistant Instrumentation Engneer in IOCL and need urgently IOCL sample paper please help me.

0 Answers IOCL,

What is meant by a bit?

0 Answers

What is modbus, profibus, fieldbus

0 Answers

What do you mean by vision and mission?

0 Answers

what is an industrial electronics engineer ? what he does ? what specialities and experties he should have ? what are the difference between industrial electronics engineer & electronics engineer & electrical engineer ?

0 Answers TATA,

what s mean by monolithic integrated circuit technology?

2 Answers

how many type of network protocol

0 Answers

What is an integrated circuit?

1 Answers

IN GENERAL PRACTICE HOW KVAR AND CAPACITANCE VALUE OF CAPACITOR CALCULATED?

1 Answers

For more Electronics Communications Interview Questions Click Here