Device BenchGuides · Methodology & fixes
The deep dives behind the tools.
Every tool on this site tells you a number. These guides explain where the numbers come from, what causes the faults they reveal, and which fixes hold up — written to be checked against your own measurements, not just read.
-
Game input
Stick Drift: Measurement, Limits, and Next StepsWhat the browser can measure at rest, how to read the comparison bands, and what a measurement cannot tell you about the hardware.
-
Input
Key Rollover and Ghosting, ExplainedWhy some key combos won't register, what NKRO really means, and how to test yours.
-
Input
Keyboard Chatter: Fix a Key That Types TwiceWhy a switch fires twice, the cleaning that works, and when replacement is the answer.
-
Audio in
Microphone Too Quiet? Fix Low Mic VolumeA systematic path through distance, gain, OS settings, and browser processing.
-
Audio in
What dBFS Means on a Mic Level MeterReading digital levels: why 0 is the ceiling, where speech should sit, and what clipping is.
-
Video in
Why Webcams Look Grainy — and What HelpsLight, exposure, and compression: what actually changes image quality, and what doesn't.
-
Display
Dead Pixel Warranty Rules: ISO 9241-307, ExplainedWhat ISO 9241-307 standardizes, why old class tables are not a current warranty, and how to document a model-specific claim.
-
Measurement
How a Bank Card Measures a Screen's Pixel DensityWhat a card match actually yields: pixels per millimeter, a density in ppi, and the physical size of the glass.
-
Choosing a timer
Classroom Timer or Interval Timer?One counts down once and must read from the back of a room; the other repeats and must survive a backgrounded tab.
How these guides are written
Each guide is anchored to a measurement you can run yourself with the matching tool, in your browser, with nothing uploaded. Claims are stated so you can check them — resting thresholds, standard dimensions, level targets — and where the honest answer is "it varies" or "that fix is temporary," the guide says so instead of promising magic.
Every guide names Device Bench as its publisher, shows its publication and review dates, and links the standards or platform documentation behind factual claims. The complete evidence, refusal, privacy, and correction policy is published in How Device Bench tests its browser instruments.