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NTSC TV​/​Monitor CRT Noise

by Cheesy Nirvosa

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Modern displays don't make much of a sound anymore, but the old CRT types make a super high frequency noise that lots of people can't hear. I've always noticed the sound distinctly and now I know what the exact frequency is thanks to the explanation I found below:

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50 Hz/60 Hz CRTs used for television operate with horizontal scanning frequencies of 15,734 Hz (for NTSC systems) or 15,625 Hz (for PAL systems).

These frequencies are at the upper range of human hearing and are inaudible to many people; however, some people (especially children) will perceive a high-pitched tone near an operating television CRT.

The sound is due to magnetostriction in the magnetic core and periodic movement of windings of the flyback transformer. Magnetostriction (cf. electrostriction) is a property of ferromagnetic materials that causes them to change their shape or dimensions during the process of magnetization.

The variation of materials' magnetization due to the applied magnetic field changes the magnetostrictive strain until reaching its saturation value, λ.

- Anonymous ( from deleted reddit user, I wish I could credit you as this is the best explanation I have seen of this sound. )

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released December 24, 2022

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Cheesy Nirvosa Fayetteville, Arkansas

Crysknife007 specializes in extended ambient space and spaceship sounds. He also enjoys working with other scifi soundscapes.


Also known as Cheesy Nirvosa, his homefried beats break from traditional cycles and regularity. The sound aims more for confusion than melody, often favoring some that sounds particularly out of place than a tune which syncopates expectedly.
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