I don't know the theory behind this stuff, but here it goes:
Headphone jacks tend to have a capacitor in-line with the output terminals to get rid of any DC bias -- this can cause problems like battery drain, lots of noise when you plug headphones in, and damage to the driver coil of headphones -- not good!
I like to think of a capacitor like a shock absorber, with the length of the shock absorber being like the voltage it's currently storing. If you push on one end of a shock absorber, the larger the force (current), the larger the rate of change of voltage (length), so this analogy might be useful.
Imagine holding on to one end of the shock absorber while someone else tries to move it back an forth at a given frequency. If they try to move it back and forth slowly, the maximum force (current) is going to be low, and so the total energy will be low and you won't get shaken much -- the shock absorber will just change length (voltage).
If they try to move it back and forth quickly, the force (current) will be much higher, and so you can extract a lot more energy from it.
I believe it's the same reason portable devices have poor bass response.
Headphone jacks tend to have a capacitor in-line with the output terminals to get rid of any DC bias -- this can cause problems like battery drain, lots of noise when you plug headphones in, and damage to the driver coil of headphones -- not good!
I like to think of a capacitor like a shock absorber, with the length of the shock absorber being like the voltage it's currently storing. If you push on one end of a shock absorber, the larger the force (current), the larger the rate of change of voltage (length), so this analogy might be useful.
Imagine holding on to one end of the shock absorber while someone else tries to move it back an forth at a given frequency. If they try to move it back and forth slowly, the maximum force (current) is going to be low, and so the total energy will be low and you won't get shaken much -- the shock absorber will just change length (voltage).
If they try to move it back and forth quickly, the force (current) will be much higher, and so you can extract a lot more energy from it.
I believe it's the same reason portable devices have poor bass response.