Meizu Weird Sound

HprAtvFrk · 02-23-2007

Ditto. Anything wrong with this?

audiofish · 02-25-2007

Quote:

Originally Posted by iamdmc

But if it's DC, not charging, etc. the current should remain at a constant, should it not? And the TV has to do with the speakers, AC current, and the CRT (which is basically an electron gun)

Correct me if I'm wrong, but I still don't think that is the answer.

Although Lithium Ion batteries, the type in the Meizu, are charged with a DC current, the voltage applied is often varied using a technique called Pulse Width Modulation whereby the electricity is pulsed on and off many times per second. See: http://en.wikipedia.org/wiki/Pulse-width_modulation.

If this is the case, the electricity could capacitively couple to the sounder inside the meizu which generates the click tones.

If that were the case, however, it would be constantly on - not just when files are transferred and on startup. My guess is that the microprocessor inside the meizu is not correctly turning off the sounder and is being somehow driven by the data signals from the flash memory - that could explain the fact it only occurs during these particular times. I'm just speculating - it would be hard to tell without opening it up and connecting it to an oscilloscope.

In a TV there is a high-voltage 'boost' converter that requires an oscillating voltage to function. This high-voltage, oscillating signal is what you can hear.

Nickle · 02-25-2007

mine does that too all the time, except you can barely hear it!