External USB-Powered 3.5mm Speaker Emits Static Noise When Idle on Windows 11

Problem
My external speaker (powered via USB, with a 3.5mm TRS jack for audio input) emits an electrical static noise whenever no audio is playing. The noise starts after roughly 2 to 5 seconds of inactivity and disappears immediately as soon as audio playback resumes.

Environment
* Operating System: Windows 11
* Device Type: Laptop
* Connection: USB (power) + 3.5mm TRS jack (audio input)
* Drivers Tested: Realtek audio drivers, latest Intel HD driver

Symptoms & Details
* Static noise begins after ~2 to 5 seconds of inactivity.
* Static stops instantly when audio playback resumes.
* The issue occurs regardless of whether the laptop is plugged into AC power or running on battery.

What I've Tried
* Switched drivers from Realtek to the latest Intel HD driver. It almost seemed to work yesterday, but the static noise returned today while still using the Intel driver.
* Re-changed drivers and restarted the laptop, but the static noise persists.

Is there a fix or setting adjustment (such as power management or driver configuration) to prevent this electrical static noise while idle?

Thanks!

The issue can be caused by any of the following:

Remove all other usb devices to see if the noise is present. If it's not, you have some other usb device causing interference. Plug them in one at a time to see if you find the culprit.

Disble Audio power sharing depending on your driver:

• Realtek Audio Console → disable any “Power Management” or “Idle Power‑down” options
• Device Manager → Audio device → Properties → look for a Power Management tab

USB ports on laptops often provide “dirty” power. When the speaker’s amplifier goes idle, it becomes more sensitive to electrical noise on the USB rail. Noise sources can be
wifi/bluetooth
cpu/gpu changing power states which introduce noise
poor shielding on inexpensive USB speakers
any other USB device

Try another usb port if you have one.

Many cheap USB speaker provide minimal filtering. My suggesting is to either use a powered usb hub. Or better yet, self powered speakers.