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Snitch (on danger)

Snitch is a wearable device designed to help adventurers detect any upcoming danger in the wild

As part of our Ideation & Prototyping class, we were asked to get inspired by nature and create a usable product based on the principles of Design Thinking and HCI. The theme was Biomimicry.
This project was created in three weeks during the Fall 2022 semester in a group of 4 people.
My Role- I was mainly responsible for the research, creating user personas and customer journey map as well as the UI screens for the wearable wristband.


Vigilant behavior helps animals to detect environment changes immediately even when in sleep. Animals know which echo or sound means danger, but humans can't detect that broad range and far distance. Therefore, a device that can help humans to respond to danger more quickly and in advance would save a lot of lives.


Inspired by the echolocation in animals, this wearable device will send ultrasonic frequency and will alert users based on the feedback. The device will also be connected with Starlink' s satellite to provide network where usually there isn't any.


For the initial research, we started with some initial questions to define the potential use cases of this solution.

Three main user categories which we identified-

  • People with low vision and/or hearing loss

  • People with dangerous jobs

  • People who have adventurous hobbies

After further research, we decided to focus on the third user category for this product- people who are into adventurous activities like biking, hiking, camping, etc.

We conducted one-on-one sessions to understand the users and the most common problems faced by adventurers-

  • Fire Hazards

  • Animals & Insects

  • Extreme Weather Conditions

Our target users are-

  • Ages 18-40

  • Understands technology

  • Love for outdoor activities such as mountaineering, hiking, cycling, motorcycling, running, camping

  • Upper-middle class background


ACR Bivy Stick - $249 .95

Use Iridium global satellite

Feature: Communication and tracking device

Garmin Bivy Stick - $299.99

Using satellite

Feature: Send/receive messages

Mammut Barryvox S - $599.99

Using satellite

Feature: Auto guidance, send/receive messages, send location.

User Persona

Customer Journey Map

Product Price Breakdown

The Product

We designed a wearable device system for hiking and camping in woods, to alert users for potential dangers and help them escape with pro tips result in a higher percentage in surviving from dangers.

Goal 1 - Alert in fast, effective, and safe way, without disturb living creatures

Goal 2- Notify the users with types of danger and it's use case with pro tips to increase their surviving chance

Initial iterative sketch

Initial iterative sketch idea


We 3D printed the prototypes to test on our users. The materials are PLA & Athletic Tape.

Finalized on 3 prototypes and conducted user test in order to test user's preference to different forms of the product.

User Testing- 01

Try out each of 3 prototypes in our provided scenarios, and answer questions on user experiences.

What should we improve on?

  • Something attached to body

  • Improve size and comfortness

  • Provide suggestions on escaping from different dangers

Story Board


Material: Arduino, sound sensor, vibration motor, battery case, wires

Fabrication Process

Fabrication Process

Wearable wrist band screens

The device will be connected with a wristband showing the type of danger approching and its distance to the user currently.

User Testing- 02

Video documentation of the fabrication process and how the fixed wearable device works

User Testing Findings


  • Portable & convenient & light weighted

  • Advanced rescue system

  • Notification very intuitive, can be felt easily

  • Clear interface for novice, easy to learn


  • Still a little bulky

  • Battery life

  • Aesthetics

  • Adhesive: may fall off during intense activities

Future Improvement Directions

  • Reduce Volume, more flat

  • Long battery life

  • Re-use and stronger adhesive material

  • Compatible with other devices (etc. smartphone apps)


  • A. Krishnan, G. Deepakraj, N. Nishanth and K. M. Anandkumar, "Autonomous walking stick for the blind using echolocation and image processing," 2016 2nd International Conference on Contemporary Computing and Informatics (IC3I), 2016, pp. 13-16, doi: 10.1109/IC3I.2016.7917927.

  • Diebold, C.A.; Salles, A.; Moss, C.F. Adaptive Echolocation and Flight Behaviors in Bats Can Inspire Technology Innovations for Sonar Tracking and Interception. Sensors 2020, 20, 2958.

  • I. A. Aziz, S. Mahamad, M. Mehat and N. Samiha, "Blind echolocation using ultrasonic sensors," 2008 International Symposium on Information Technology, 2008, pp. 1-7, doi: 10.1109/ITSIM.2008.4631900.

  • S. Kim, 7 - Bio-inspired engineered sonar systems based on the understanding of bat echolocation, Editor(s): Trung Dung Ngo, In Woodhead Publishing Series in Electronic and Optical Materials, Biomimetic Technologies, Woodhead Publishing, 2015, Pages 141-160, ISBN 9780081002490, (

Thank You!

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