Noise samples, Alphacool Apex Stealth Metal Fan and Noctua NF-A12X25 PWM chromax.black.swap.
1. Noise samples for 35dBA, 40dBA, 45dBA and PWM 100% operations.
2. Noise samples for 2 noise level ranges to verify the test results by Igor's Lab:
Noise level range: 23 ~ 24dBA
i) Apex Stealth Metal Fan: 1900RPM (claimed 23.90dBA)
ii) NF-A12X25 PWM: 400RPM (claimed 23.70dBA)
Noise level range: 38 ~ 39dBA
iii) Apex Stealth Metal Fan: 2900RPM (claimed 38.10dBA)
iv) NF-A12X25 PWM: 1700RPM (claimed 38.98dBA)
Microphone: Matastudio C10
Camera: Samsung Galaxy Note 9 / STCOM FHD60F
PWM control: lich426's FanCtrl
Reference
0:46 I. Wallossek, "Alphacool Apex Stealth Metal Power Fan (Vorserie) [120 mm] vs Noctua NF-A12x25 PWM (2023) [120 mm]," Igorslab.de, Dec. 2023, [ Ссылка ] (accessed Jan. 15, 2024)
