When dealing with sound, you some times see RMS when it comes to wattage. What does RMS mean?
108617
Great question.\n\nLiterally RMS means Root Mean Square, it is a simple way to take the average of a varying electrical signal.\n\nAs you know, a pure musical tone looks like the up and down pattern of waves when you drop a pebble in a calm pond. This shape is called a sine curve.\n\nSine curves vary from negative to positive values so if you add them up to take an average they would "cancel out".\n\nThe trick is to square (multiply by itself) each value before adding them. This turns all the negatives into postive values. No cancelling! Then you take the MEAN (the average). Then to get back to a "normal" number, you take the square root.\n\nThe problem is that in audio power, the average power in watts is really just a direct average of the actual power output. Since power is always positive, there is no need to use the RMS averaging method. Really you just sample the power for a while and average it the regular old fashioned way.\n\nHowever, because you can get a quick approximation of the power output of a system from the RMS value of the electrical current of a sine curve, marketers in order to make you feel awed have taken to calling audio power "RMS power". It is really just average power though and is a fairly meaningless measure of goodness. For instance you might have two systems with equal power, and one could sound like a dollar-store radio! LOL! but so true!\n\nThis is just marketing silliness. But it sounds good doesn't it?
790419
Volts.  The the force behind electricity. Ampere is the mount of current. Ohm is the unit of measure for resistance.
611131
Depends on which 'unit' you're talking about   :P
416586
DeciBels below 1 Milliwatt) A measurement of power loss in decibels using 1 milliwatt as the reference point. A signal received at 1 milliwatt yields 0 dBm. A signal at .1 milliwatt is a loss of 10 dBm.\n\nOR\n\nDataBase Manager
1110126
I assume that a power factor is zero and current and voltage are given in  RMS values then \nPin=IV= 4x120=480 Watts\nPout=.8 (Pin)= 384 Watts\nHorsepower = Pout/ 746W  = .515 HP or ~1/2 HP
61161
A "mil" is one thousandth of an inch.  \nIn some applications, vibration is described in terms of displacement.  If a the vibration of surface is described as "10 mils pk-pk", that means that the distance between the highest point that the surface reaches and the lowest point is 10 mils, or 0.010 inches.\n\nVibration is more accuractely described in terms of acceleration and frequency; for example, "10 Hz at 0.05 m/s^2 rms".  This gets much more complicated when something is vibrating at many different frequencies, so vibration is often descibed as either the total rms vibration over a defined frequency range or as a total peak to peak displacement (which is where your "mils" question comes in).
291872
Volts is a unit of measure for Voltage\nAmps is short for Amperes and is a measure of Current\nWatts is a measure of Power\n\nNow Voltage, Current and Power are related quantities but not equivalent quantities. The relatioship is as described in the previous answer: Power=Voltage*Current\n\nSo Watts = Ampere * Volts\n\nAsking how many watts in a volt is like asking how many seconds in a meter
719322
Sound is usually measured in decibels
474968
The Watt is a unit of Power.\n\n(I'm pretty sure P does not equal vf though)\n\nEDIT - No you're right. I had to work it out for my own peace of mind though!\n\np=e/t\nw(e)=fd\np=fd/t\np=f(d/t)\np=fv
489794
Surface finish is called out as ra, rms, or rz.  They each have their own formula.
328811
power to weight ratio = power/weight.\n\nIn quoting it, you must give the units, e.g.\nhorsepower per ton, watts per pound, kilowatts per kilogram...
873959
Note that it also depends on frequency.\n\nhttp://en.wikipedia.org/wiki/Loudness
797161
There is no such thing.\n\nCurrent is current, measured in amperes. Watts are power.\n\nPower is a measure of work per unit time. One watt (of power) is one joule (of work) per second.\n\nOne ampere (of current) is one Coulomb (of electrical charge) per second.\n\nIt takes one joule of work to push one Coulomb of charge through one volt.\n\nAnd finally, a watt-hour is an amount of work--the power of one watt for one hour. It is 3600 joules.
364223
gain is the first step on the preamp of a sound mixer, you will see the gain control knob as the first knob on top for each channel on a sound mixer.\n\ngain also reffers to the amount of valume, for example i would say "i need more gain" when i'm asking for more valume.
1138430
Not a good question. Power is related to the volume of fuel/air mixture.
947068
Don't give up too easily on the sound wave thing.  Graphic equalization.  Sound is measured in hertz (Hz) & Kilo Hertz (KHz), Kilo being the metric measure for 100.  Start with the low tones - long wavelengths, low number of hertz.  Move up the tone scale. As the tones get higher pitched the smaller the wave lengths - increased number of hertz. Super highs, like cymbals are in the kilohertz range and so on.  It's an everyday thing that everyone can relate to .  When you hear a siren go by the tone is lower as it approches and higher, faster, as it passes you and back to lower tones as the object receeds.  Good luck.
921255
In live music, a monitor is a speaker that lets a performer hear themself during a performance, thus a monitor amp is the amplifier that powers that speaker.  The speaker cabinets used are the small, low ones you see in the front row of equipment, just in front of the front row performers, facing the performers.  Some monitor cabinets are "powered" meaning they have an internal amplifier.  Some are only speaker cabinets that rely on a separate amplifier to power them, which could be called a "monitor amp".\n\nIn other applications any speaker set up to hear music in real time might be called a monitor and so the amplifier powering it would be called a monitor amp.