The whistle is changing though, once you anwirft the projector, but I found none of the sounds pleasant.
At my first complaint said the Sony service that he had never heard of a whistling power supply with this device. Yesterday I got delivered the replacement alarm clock and even whistles.
The power supply is firmly connected to the device, so I can unfortunately not itself replace it with a noiseless.
I want a device that wakes me and no one who keeps awake me, I can the Sony alarm clock do not need and do not recommend.