When Science Meets Magic: The Footstep-Sensing Invention Inspired by Harry Potter’s Marauder’s Map.

When Science Meets Magic:
The Footstep-Sensing Invention Inspired by Harry Potter’s Marauder’s Map.


The Marauder’s Map, seen in Harry Potter series, is considered as one of the most wanted magical objects since it allows the owner to see every single individual in Hogwarts, and understand what they are doing at that time as the map displays their names and exact locations. Here, Pei Zhang from Carnegie Mellon University, in collaboration with Hae Young Noh from Stanford University, has conducted the research on floor vibrations sensing in order to bring this fantasy world’s enchanted map into our modern world.


Zhang and Noh defined “vibrations which are transmitted through the floor” as the key that helps create the duplicate Marauder’s Map, so they installed devices on the ground to detect vibrations. In the same way, machine learning algorithms were used to distinguish between vibrations from humans’ footsteps and irrelevant vibrations, such as background noise, which are created by other objects and machinery. With this vibrations sensing system, researchers could change the entire structure into one enormous sensor platform. Thus, there is no need of charms or spells to create this enchanted map. 

Researchers could determine all individuals’ identity and locations by detecting their footsteps and gait. Likewise, Zhang and Noh aim to understand individuals’ size, health, status and their state of mind by considering the way they are walking. 

This vibration sensing project has been carried out efficiently thank to researchers’ potential and professional experience: (1) Zhang, an associate professor of electrical and computer engineering, who specializes in sensing and analyzing sensor data by using machine learning; and (2) Noh, formerly an associate professor of civil and environmental engineering at Carnegie Mellon University, who studies how vibrations are transferred through the building. 


This sensing systme can possibly be applied to a variety of industries, including agirculture. In Thailand, there is a study on geophone-based (vibration) sensors used in pig farming.  With this sensors, pig farmers can monitor pigs’ behaviors more closely by detecting the vibrations from their footsteps or other motion, so that allows farmers to identify sick pigs.

Similarly, this project possibly provides great benefits to healthcare. The sensors help doctors in identifying people who might face the neurological disease because the sensors can detect the change in a person’s movement or regular activities which might be the early warning of heart attack or stroke. 



Retrieved from: https://engineering.cmu.edu/news-events/news/2020/02/17-mauraders-map.html

Explore More Stories

View all
September 8, 2025
Bringing AI to Bang Krachao: A New Hope for Water Management and Agriculture
An AI-powered salinity prediction and mobile app system is helping Bang Krachao improve water management, protect agriculture, and support sustainable community livelihoods.
Read more
September 8, 2025
Smarter Treatment for UTIs: How Machine Learning is Personalizing Antibiotic Choices
Machine learning is being used to personalize antibiotic choices for UTIs, creating smarter treatment plans that improve effectiveness while reducing antimicrobial resistance.
Read more
September 8, 2025
A Tutor That Learns With You: Why Canarie Feels So Personal
Canarie is a gamified AI-powered platform that combines structure and support to make computer science learning personalized, engaging, and approachable.
Read more
June 6, 2025
Turning Words into Voice: CMKL Students Create Audiobook App for the Visually Impaired
Turning Words into Voice: CMKL Students Create Audiobook App for the Visually Impaired
Read more