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There are many small Transformers and electronic oscillators in a CRT monitor which scan the electrons across the screen, blank them at the end of a line and return the beam to the left of the screen in order to start the scan again. These transformers have alternating currents flowing through them which make the ferrite cores 'chatter' at the same frequency. This frequency is about 18,000 cycles per second which makes this audible noise.
What else can I help you with?
What sounds do iguanas make?
they make a hissing sound
What does a turtle sounds like?
They make hissing sounds sometimes
What kind of sounds does cheetahs make?
a hissing, growling, of a snarl
Can bearded dragons make sounds?
The only sound a Bearded dragon can make is a hissing sound because they have no vocal chords
What sound does a tortoise make?
Tortoises are generally silent animals and do not typically make vocal sounds. In some cases, they may produce hissing sounds when feeling threatened or scared.
What sounds do wallabys make?
chatteringwhistlinghissingwhimpering
How does a hissing cockroach make a hissing noise?
Madagascan hissing cockroaches make a noise by forcing air out of a special hole.
How many sounds can a cat make?
A cat can make 100 sounds and dogs can only make 10.
Hissing sounds coming from a chest wound?
Likely to be a punctured lung.
What noise does a hedgehog make when it is attacked?
When they are in a state of utter terror, they will squeal/scream. However, defensive sounds are popping, clicking, hissing, and growling.
Why do ferrets make a hissing sound?
A ferret that make a hissing sound means they are annoyed or irritated
Hissing bird 5 letters?
Geese make a hissing sound.
