Does your new 27" LED Cinema Display buzz?

Question

Got my 27 inch LED Cinema Display yesterday: very nice monitor.
However, I have noticed a feint buzz/ticking coming from the bottom right of the monitor when the brightness is set high. Just loud enough to be VERY annoying!
Is this a feature of the monitor? Does anyone else's new 27" Display have a buzz?

Answer 1

yes, the reason it sounds like the electromagnetic interference that induces tones in speaker drivers (such as the microwave energy from cell phones) is because it is essentially the same mechanical action... which is a resonation electromagnetic coil (which will produce tones at whatever frequency it is vibrating).
The specific tones that it is producing are dependant on the electrical properties of the circuits attached to the coupled device - but it's probably possible that particular properties could cause the coils to create more than a single tone (just like a speaker)... on mine the tone didn't quite sound singular, but since the amplitude was analogue to the brightness i guessed that this pointed the transformer.
It used to be such a serious problem in inductively coupled conductive devices that it could shake the devices to pieces. These days it's only really an irritation in terms of noise - but it remains necessary to design the structure and housing of these devices to dampen and minimise these vibrations.
In much larger transformers the noise is very noticeable (have a listen the next time you pass an electrical substation).
... i could be wrong but it's a common problem in electronics and i think it's likely.