Noise when recording even there is no sound

when i try recording with audacity there is always a big backround noise even there is no sound.
i tried both with the internal laptop speaker and an external speaker.

Audacity 3.4.2
Operating System: Manjaro Linux
KDE Plasma Version: 6.0.3
KDE Frameworks Version: 6.1.0
Qt Version: 6.7.0
Kernel Version: 6.9.0-rc4-1-MANJARO (64-bit)
Graphics Platform: Wayland
Processors: 4 × Intel® Core™ i5-6300U CPU @ 2.40GHz
Memory: 11,6 GiB of RAM
Graphics Processor: Mesa Intel® HD Graphics 520
Manufacturer: Dell Inc.
Product Name: Latitude 7480

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