What's this?
- Thread starter physis
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ron
Senior Member
- Location
- New York, 40.7514,-73.9925
Re: What's this?
I'm not familiar with this type of signal processing, but here's my best guess.
It either means that the:
frequency begins at time 0, with a range of 1 to 50, and as it approaches 100 seconds, its range is much smaller centering around 23 Hz or so. In addition, at time 0 the amplitude of the signal is 0 and increases with time.
The other way of seeing it is the amplitude begins at time 0, with a large range and as it approaches 100 seconds, its range is much smaller. In addition, at time 0 the frequency of the signal is 0 Hz and increases with time to approx 40Hz.
The graph is not well labeled.
I'm not familiar with this type of signal processing, but here's my best guess.
It either means that the:
frequency begins at time 0, with a range of 1 to 50, and as it approaches 100 seconds, its range is much smaller centering around 23 Hz or so. In addition, at time 0 the amplitude of the signal is 0 and increases with time.
The other way of seeing it is the amplitude begins at time 0, with a large range and as it approaches 100 seconds, its range is much smaller. In addition, at time 0 the frequency of the signal is 0 Hz and increases with time to approx 40Hz.
The graph is not well labeled.
ralpha494
Member
- Location
- Southeastern Wisconsin
Re: What's this?
I believe it is the cover of Quadratic Chirps' debut cd on Capitol Records, available at record stores beginning April 1, 2005.
I believe it is the cover of Quadratic Chirps' debut cd on Capitol Records, available at record stores beginning April 1, 2005.
luke warmwater
Senior Member
Re: What's this?
The 'quadratic chirp' in the above spectrogram is actually the Red Line that sweeps from bottom left to top right.
The black line that Ron is describing appears to be a WAV file byte that is drawn or layered on top, so that would explain the possibility of being an Album Cover.
The 'quadratic chirp' in the above spectrogram is actually the Red Line that sweeps from bottom left to top right.
The black line that Ron is describing appears to be a WAV file byte that is drawn or layered on top, so that would explain the possibility of being an Album Cover.
peter d
Senior Member
- Location
- New England
Re: What's this?
Like everything in nature, it displays exponential decay very well.
Like everything in nature, it displays exponential decay very well.
Re: What's this?
Ever seen the spring type "door stoppers" a lot of people have in their house? The type that mounts on the wall behind the door, and the door hits the spring before it hits the wall.
My 2 year old son loves to pull the spring sideways and then let go. The spring bounces back and forth making a sound that I'm not going to try to describe.
Anyhow, at first the spring makes large slower swings. And as time goes on, the swings are smaller, and faster. I think that's what they are showing.
The red line shows the base frequency starts at zero, and goes up to 40 hz. I assume the other colors are amplitudes of harmonics in some way. And for my spring example, the black line would be a graph of position vs. time.
Or it may be a record cover!
Steve
Ever seen the spring type "door stoppers" a lot of people have in their house? The type that mounts on the wall behind the door, and the door hits the spring before it hits the wall.
My 2 year old son loves to pull the spring sideways and then let go. The spring bounces back and forth making a sound that I'm not going to try to describe.
Anyhow, at first the spring makes large slower swings. And as time goes on, the swings are smaller, and faster. I think that's what they are showing.
The red line shows the base frequency starts at zero, and goes up to 40 hz. I assume the other colors are amplitudes of harmonics in some way. And for my spring example, the black line would be a graph of position vs. time.
Or it may be a record cover!
Steve
physis
Senior Member
Re: What's this?
This is the site it comes form. It's very doctored for a graph but I think the album cover (although a valid guess) is likly not it.
You can always right click an image and find it's url under properties.
This is the site it comes form. It's very doctored for a graph but I think the album cover (although a valid guess) is likly not it.
You can always right click an image and find it's url under properties.
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