What is the difference between dB SL and dB HL? - Answers
May 20, 2024 · Finally, dB nHL stands for "normalised hearing level". This is the same concept as dB HL, except the number of test subjects contributing to the average is smaller.
signal - A confusion between dB and dBVrms - Electrical Engineering ...
Jul 22, 2018 · dB is always power ratio and we can write it in terms of voltage ratio. Imagine Vx = Vs*sin(wt) where Vs is the amplitude. In the case of dBVrms the Vref is 1V rms. So: dBVrms = …
dB (rad/√Hz) - Electrical Engineering Stack Exchange
Oct 5, 2022 · Trying to better understand phase noise units and characterize a device to compare with specs. I'm used to measuring in dBc/Hz, but the specs given are in dB(rad/√Hz)/m, which I guess is …
What is difference between spn and tpn mcb db? - Answers
Oct 24, 2022 · TPN MCB means Triple pole Neutral Miniature Circuit Breaker where as SPN MCB means single phase Neutral MCB.
A question about negative dB in LTspice
What does -dB mean here for the current? 0 dBI is exactly 1 amp (not to be confused with dBi which is the gain of an antenna compared to the benchmark (i)sotropic antenna) A current of 100 mA is -20 …
How to find Z impedance if I have only S11 (db) and phase
Mar 24, 2021 · I do not know line impedance. I want to find it. The output of VNA is 50 ohm. S11 is the return loss, it shows the difference between the level of the output signal to reflected signal and it is …
How loud is 47 db? - Answers
May 23, 2024 · 47 dB is considered to be a moderate noise level, similar to the sound of a quiet conversation or background noise in a library. It is generally not loud enough to cause discomfort or …
Is the roll-off gain of filters always -20 dB/dec? - Electrical ...
May 15, 2018 · My lab instructor told us that the roll-off of filters after the cutoff frequency is -20 dB/decade (he was talking about a Low Pass RC filter). However, sometimes, when I am solving …
What exactly does C/No (dBHz) mean in u-Blox GPS data?
This is to confirm @hatsunearu's answer and to add a little more math. According to Wikipedia's Carrier-to-noise-density ratio: In satellite communications, carrier-to-noise-density ratio (C/N₀) is the ratio of …
amplifier - S parameters calculation from VNA file - Electrical ...
Aug 16, 2023 · The first column does happen to be the frequency in Hz, but S means "this file has S-parameters", RI means "the values are real/imag pairs" (rather than magnitude/angle or dB/angle), …