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In this next addition to our engineering deep-dive series, we talk with Malcolm Gutenburg, a thermal engineer at NVIDIA (and formerly Intel). This video goes deep with acoustics engineering as it relates to thermal design, so we talk about finding and identifying coil whine with lasers, fan blade design and engineering, critical bands and one-third octave bands for data presentation, and tone-to-noise prominence ratio. The discussion also gets into psychoacoustics and the structure of the inner ear.

Watch our engineering interview with Noctua previously!    • The Forbidden Noctua Interview: Fan E...  
Watch our video cutting the RTX 4090 cooler in half previously, also ft. Malcolm!    • Cutting an NVIDIA RTX 4090 in Half wi...  

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TIMESTAMPS

00:00 - The Science of Fan Noise Engineering
02:23 - Lasers for Coil Whine Noise
05:00 - Measurement Equipment & Software
05:51 - The Acoustic Chamber
06:28 - Why Use a Hemi-Anechoic Chamber
07:23 - Fan Blade Engineering
09:11 - Angle of Attack, Blade Count
12:10 - Hub Size Engineering
13:52 - Stall Region Whiteboard
19:03 - Test Setup & Microphones
23:28 - "Below 0dB" Explained & Fully Anechoic
27:43 - Extremely Technical Acoustic Discussion
31:03 - Psychoacoustics & Ear Structure
34:33 - Ray Tracing Sound in Engineering

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Steve Burke: Host, Video Editing
Vitalii Makhnovets: Camera, Editing
Guest: Malcolm Gutenburg, Thermal Engineer at NVIDIA