The Phone Vibration Study
What it is
We attached my iPhone to my wheelchair, close to one of the small front wheels, and recorded the vibrations as I rode through a city full of cobblestones. The idea was simple: lived experience is hard to convey in words, so let the sensors testify instead. We also tried the same setup on a walker and a rollerbag.
What it captured
Within minutes, the vibrations were so violent that they triggered the iPhone’s “Shake to Undo” feature. The phone concluded that something this rough must be a mistake. It is not a mistake. It is designed cobblestones, chosen materials, accepted standards, normalised harms. That prompt, meant as a convenience, became the experiment’s testimonial.
How to run it
- Get the app: download SparkVue by Pasco Scientific.
- Select sensors: “Build new experiment” (top menu option) → choose “Sensor Data” (button in the middle of the screen) → choose the “On-board Acceleration Sensor” → choose acceleration resultant or X-Y-Z axes, and pick a graph style.
- Mount the phone: use Velcro or a sturdy mount to attach it to a wheelchair, walker, or stroller, as close to the front wheels or axle as possible.
- Record: hit “Start” in SparkVue and roll over different surfaces. Use the phone’s screen-recording features to record a video of your screen.
- Optional: record video as well, for instance on a GoPro or Insta360 camera. This way, you can follow what happens over time, and even sync it to the screen-recording.
If you get stuck, send me a message.
What it feeds
The study became newsletter edition #12, Vibrating Inequality, and it grounds the argument that surfaces are design choices: the vibrations are not unfortunate side effects of historic cobblestones, they are the continuing impact of surfaces designed for walking feet, not rolling wheels. If you try it, please tell me what you learn.
Download the run sheet (PDF, 74 kB). One page, ready to bring along
Read the full story: Vibrating Inequality – Testimonial from an iPhone →