I'm confusing myself here :
Consider the cases, two tones 100Hz and 1KHz, two drivers.
One driver gets 100Hz, driver A , the other 1Khz, driver B.
Both cases driver B is mounted to the moving parts of driver A.
Case 1
Driver A is large, driver B is small.
(Basically A produces 100Hz, B produces 1Khz)
The combination will produce an output with phase relationships
between the two signals that do not exist in the original signal,
i.e. the time axis for B is being modulated ?
i.e. the 1kHz tone is frequency modulated ?
If A and B are both fixed in position this does not occur.
Case 2
Driver A is small, driver B is large
(Basically A modulates B's position, B produces all the sound)
This is equivalent to a single driver ?
Phase relationships are maintained compared to the original signal.
This is where I get confused
sreten.
Consider the cases, two tones 100Hz and 1KHz, two drivers.
One driver gets 100Hz, driver A , the other 1Khz, driver B.
Both cases driver B is mounted to the moving parts of driver A.
Case 1
Driver A is large, driver B is small.
(Basically A produces 100Hz, B produces 1Khz)
The combination will produce an output with phase relationships
between the two signals that do not exist in the original signal,
i.e. the time axis for B is being modulated ?
i.e. the 1kHz tone is frequency modulated ?
If A and B are both fixed in position this does not occur.
Case 2
Driver A is small, driver B is large
(Basically A modulates B's position, B produces all the sound)
This is equivalent to a single driver ?
Phase relationships are maintained compared to the original signal.
This is where I get confused
sreten.
sreten said:Case 2
Driver A is small, driver B is large
(Basically A modulates B's position, B produces all the sound)
This is equivalent to a single driver ?
Phase relationships are maintained compared to the original signal.
This is where I get confused
Ahh, now I see. You think of the phase relationship between the drivers. The explanation, I think, lies in that the 100Hz tone is also slightly distorted by the doppler effect. There will be harmonics as a result of the motion. A 100 Hz tone that is frequency modulated with 100 Hz, is equivalent to a distorted 100Hz tone, right? These harmonics are probably far smaller than the usual forms of distortion in loudspeakers, but might be important for understanding the concept above.
I'll *have* to do the experiment some day!
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