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dB (decibel) is a logarithmic measure of the ratio of two power values, for example, two signal strengths. This is often used for power gain or power loss. For example, a loss of 10 dB means that the signal degrades by a factor of 10, a loss of 20 dB means that the signal degrades by a factor of 100, and a loss of 30 dB means that the signal degrades by a factor of 1000.
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ABCD is a rectangle and AE equals 12 what is the length of DB?
24;
AC equals 14 cm DB equals 8 cm What is the area of this rhombus?
56 cm squared
How do you get power output with a given power input of 20dbm and three power gain which is Ap1 equals 10 ap2 equals 4 ap3 equals 23?
Two ways to do it. In this particular problem, it's a matter of opinionwhich one is easier and which one is harder.Way #1:Convert dBm to watts, multiply by gains, convert output watts to dBm.+20 dBm = 0.1 watt.Output power = (0.1 watt) x (ap1) x (ap2) x (ap3) = 0.1 x 10 x 4 x 23 = 92 watts = +49.64 dBmWay #2:Convert each gain ratio to dB, then add all dB to input power.ap1 = 10 = 10 dBap2 = 4 = 6.02 dBap3 = 23 = 13.62 dB+20 dBm + 10dB + 6.02 dB + 13.62 dB = +49.64 dBm
Is a sound that measures 100-dB ten times louder than a 10-dB?
90
What is 45 percent in decibels?
100 percent is 0 dB.50 percent is - 6 dB.45 percent is -6.935749724 dB.10 percent is - 20 dB.
If ED equals 10 and DB equals 3x - 8 what is the length of EB?
The answer is 22.
What is the area of this rhombus if AC equals 14 cm DB equals 8 cm?
112
ABCD is a rectangle and AE equals 12 what is the length of DB?
24;
If ABCD is a rectangle and AE equals 15 what is the length of DB?
30
AC equals 14 cm DB equals 8 cm What is the area of this rhombus?
56 cm squared
How 3db dandwidth equals half power bandwidth?
"3 dB" is a nickname for "1/2 power". "1/2 power" in dB = 10 log(1/2) = 10 (-0.30103) = -3.01 dB
How many watts is 98db?
It depends on the reference. If the reference electric power is P0 = 1 W (0 dB) then 98 dB equals 6309573444.8 Watts.
What is the difference between dB SPL and dB SL?
There are several types of dB. dB SPL are decibels measuring sound pressure levels. There is an accepted reference point of 0 dB SPL which equals 20 micropascals = 2 × 10-5 pascals. dB SL are decibels measuring a signal relative to an individuals auditory threshold. For example, if a person's minimum threshold is 30 dB HL (yet another type of decibel measuring how much worse a person's hearing is based on a referential dB level) and a signal is at 40 dB HL, the sensation level of this signal to this individual is 10 db SL (40 dB - 30 dB = 10 dB SL).
What does NRR equals 30 db mean?
NRR means Noise Reduction Ratio and 30 db (decibels) is about average. 30db hearing protection would be commonly used by shooters to reduce the sound of gun fire.
What are the notes for someone like you by Adele for the keyboard?
A Db E Db A Db E Db A Db E Db A Db E Db Ab Db E Db Ab Db E Db Ab Db E Db Ab Db E Db Gb Db Gb(higher) Db Gb Db Gb(higher) Db Gb Db Gb(higher) Db Gb Db Gb(higher) Db fqggbegjg2y7gdsjnjnagydsaytdgtewydtwfe
What L is measured in decibels?
L stands for level. All levels are measured in decibels or dB. You need a reference, e.g. the threshold of hearing: p0 = 20 µPa = 2 x 10-5 pascals that equals 0 dB.
Prove dbm plus dbm equals db?
The decibel scale is a logarithmic scale where each change in three dB represents a power factor change of two. (3 dB is power times two, 6 dB is power times four, 9 dB is power times 8, etc. Similarly, -3dB is power divided by two, -6 dB is power divided by four, etc.) Zero dB is assigned some arbitrary reference power. One example is 1 mV across 600 ohms. If you double the voltage into a constant resistance, the power quadruples, so 2 mV would be +6 dB, 4 mV would be +12 dB, etc. The letter after dB is the reference power. In the case of dBm, it means that 0 dB is 1 milliwatt, so 2 milliwatt is +3 dB, etc. There are many dB scales, such as dBa, used in sound measurements. Still, fundamentally, 3 dB is a doubling of power, -3 dB is a halving of power, so, for any arbitrary scale, say dBq, then saying +6dBq is saying a power four times higher than 0 dBq. In the end, dBm plus dBm is delta dB, with no scale.
