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Decibel Measurements
19 questions By Tony R. Kuphaldt
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Question 7 of 19
Convert the following amplifier gains (either power, voltage, or current gain ratios) into gains expressed in the unit of decibels (dB):
- AP = 25 ; AP(dB) =
- AV = 10 ; AV(dB) =
- AI = 37 ; AI(dB) =
- AP = 150 ; AP(dB) =
- AI = 41 ; AI(dB) =
- AV = 3.4 ; AV(dB) =
- AP = 18 ; AP(dB) =
- AV = 100 ; AV(dB) =
Reveal answer- AP = 25 ; AP(dB) = 13.98 dB
- AV = 10 ; AV(dB) = 20 dB
- AI = 37 ; AI(dB) = 31.36 dB
- AP = 150 ; AP(dB) = 21.76 dB
- AI = 41 ; AI(dB) = 32.26 dB
- AV = 3.4 ; AV(dB) = 10.63 dB
- AP = 18 ; AP(dB) = 12.55 dB
- AV = 100 ; AV(dB) = 40 dB
Notes:Nothing special here, just straightforward ratio-to-decibel calculations. Have your students share and discuss the steps necessary to do all these conversions.
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Question 8 of 19
Convert the following amplifier gains expressed in the unit of decibels (dB), to gain figures expressed as unitless ratios:
- AP = 5 dB ; AP(ratio) =
- AV = 23 dB ; AV(ratio) =
- AI = 20 dB ; AI(ratio) =
- AP = 2.5 dB ; AP(ratio) =
- AI = 7.4 dB ; AI(ratio) =
- AV = 45 dB ; AV(ratio) =
- AP = 12.8 dB ; AP(ratio) =
- AV = 30 dB ; AV(ratio) =
Reveal answer- AP = 5 dB ; AP(ratio) = 3.16
- AV = 23 dB ; AV(ratio) = 14.13
- AI = 20 dB ; AI(ratio) = 10
- AP = 2.5 dB ; AP(ratio) = 1.78
- AI = 7.4 dB ; AI(ratio) = 2.34
- AV = 45 dB ; AV(ratio) = 177.8
- AP = 12.8 dB ; AP(ratio) = 19.05
- AV = 30 dB ; AV(ratio) = 31.62
Notes:Nothing special here, just straightforward decibel-to-ratio calculations. Have your students share and discuss the steps necessary to do all these conversions.
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Question 9 of 19
Convert the following amplifier gains between decibels and (unitless) ratios as necessary:
- AV = 14.1 dB ; AV(ratio) =
- AI = 202 ; AI(dB) =
- AP = 15 dB ; AP(ratio) =
- AI = 33 ; AI(dB) =
- AP = 49 dB ; AP(ratio) =
- AV = 57 ; AV(dB) =
- AP = 8.8 dB ; AP(ratio) =
- AV = 30 ; AV(dB) =
Reveal answer- AV = 14.1 dB ; AV(ratio) = 5.07
- AI = 202 ; AI(dB) = 46.1 dB
- AP = 15 dB ; AP(ratio) = 31.62
- AI = 33 ; AI(dB) = 30.37 dB
- AP = 49 dB ; AP(ratio) = 79,432
- AV = 57 ; AV(dB) = 35.12 dB
- AP = 8.8 dB ; AP(ratio) = 7.59
- AV = 30 ; AV(dB) = 29.54 dB
Notes:Nothing special here, just straightforward decibel-ratio calculations. Have your students share and discuss the steps necessary to do all these conversions.
