- #1
abdo375
- 131
- 0
what does the classification of a signal into energy or power mean, can someone please explain the physical meaning of this, not just mathematical formulas.
Signal & Systems: Classifying Signals into Energy/Power - Explained
Click For Summary
Discussion Overview
The discussion revolves around the classification of signals into energy and power categories, focusing on the physical meaning behind these classifications rather than just the mathematical definitions. Participants seek clarification on what constitutes energy and power signals and how they relate to practical examples.
Discussion Character
- Exploratory
- Conceptual clarification
- Debate/contested
Main Points Raised
- Some participants inquire about the physical meaning of classifying signals as energy or power signals, seeking more than just mathematical formulas.
- One participant suggests that there may not be a clear definition of an energy signal, questioning if common AC voltage can be considered an energy signal.
- Another participant proposes that a power signal could be exemplified by a voltage on a conductor capable of driving a loudspeaker.
- Several participants express confusion regarding the original question, indicating a lack of clarity on the distinction between measuring power and energy in signals.
- Links to external resources are provided, but some participants find these references unhelpful or unclear.
Areas of Agreement / Disagreement
Participants do not appear to reach a consensus on the definitions or examples of energy and power signals, with multiple competing views and ongoing confusion regarding the topic.
Contextual Notes
Some statements reflect uncertainty about the definitions of energy and power signals, and there are unresolved questions about the applicability of these concepts to practical examples.
- #2
berkeman
Admin
- 69,531
- 25,111
Can you give an example to clarify your question please?
- #3
indian_tiger
- 8
- 0
i also had the same question in my mind. we are generally asked tell whether the given signal is power signal or energy signal. What excatly do we mean by this. That this signal contains power information and this signal contains energy information or something else. Can someone please clarify.
- #4
Averagesupernova
Science Advisor
Gold Member
- 4,896
- 1,556
As defined at www.dictionary.com:
Power:
The rate at which work is done, expressed as the amount of work per unit time and commonly measured in units such as the watt and horsepower.
.
.
Energy:
The capacity of a physical system to do work.
.
Off the top of my head I'd say there is no such thing as an energy signal unless you consider the AC voltage coming into our houses an energy signal. That really isn't considered a signal either. A signal is usually is defined as something that is conveying intelligence such as audio. I wonder what the audio and video are called on pro wrestling TV? I can't consider it intelligent, so is it a signal?
A power signal I would say is a voltage on a conductor that is carrying or capable of carrying (source included, such as an output transistor) enough current to drive a loudspeaker for instance or driving some other type of transducer.
Power:
The rate at which work is done, expressed as the amount of work per unit time and commonly measured in units such as the watt and horsepower.
.
.
Energy:
The capacity of a physical system to do work.
.
Off the top of my head I'd say there is no such thing as an energy signal unless you consider the AC voltage coming into our houses an energy signal. That really isn't considered a signal either. A signal is usually is defined as something that is conveying intelligence such as audio. I wonder what the audio and video are called on pro wrestling TV? I can't consider it intelligent, so is it a signal?
A power signal I would say is a voltage on a conductor that is carrying or capable of carrying (source included, such as an output transistor) enough current to drive a loudspeaker for instance or driving some other type of transducer.
Last edited:
- #5
abdo375
- 131
- 0
http://cnx.rice.edu/content/m10055/latest/
This is what I am talking about, but it doesn't make sense.
This is what I am talking about, but it doesn't make sense.
Last edited by a moderator:
- #6
Maxwell
- 511
- 0
I don't really know what you're asking either. You can measure the power of a signal and the energy of a signal.
- #7
abdo375
- 131
- 0
Maxwell said:
I think your talking about a whole other point go to
http://cnx.rice.edu/content/m10055/latest/
to see what I mean.
Last edited by a moderator:
Similar threads
- · Replies 1 ·
- · Replies 4 ·
- · Replies 14 ·
- · Replies 2 ·
- · Replies 36 ·
- · Replies 5 ·
- · Replies 4 ·