That's an electrolytic capacitor charging. The noise is called coil whine, and the reason it goes up in pitch is due to a material property called magnetostriction.
It's most likely a photoflash capacitor, but the sound effect tends to get used in media for things like night vision goggles, defibrillators, tasers, or laser pointers.
I think it's a capacitor charging or discharging, I can't remember which.
That's an electrolytic capacitor charging. The noise is called coil whine, and the reason it goes up in pitch is due to a material property called magnetostriction.
It's most likely a photoflash capacitor, but the sound effect tends to get used in media for things like night vision goggles, defibrillators, tasers, or laser pointers.
The more you fucking know
:the-more-you-know:
Not really related, but made me think of this