SENSING SOUND (PHYSICS)
This is the high-frequency sound that is too high for humans to hear, used by our sensor.
Ultrasound
This is the open-source microcontroller board we used as the "brain" of the project.
Arduino uno
This SDG goal (Number 9) focuses on Industry, Innovation, and ________
Infrastructure
This animal uses biological sonar, or "echolocation," which inspired our project's sensor.
bat or dolphin
wireless technology used to send alerts to the Android phone.
bluetooth
Self-driving cars use a more advanced version of our project called "Lidar," which uses light instead of this.
sound
To calculate distance, the sensor sends out a pulse and waits for this to happen.
echo
This component makes a noise when the code detects an object closer than 20cm.
buzzer
This term describes a city that uses sensors and data like ours to manage traffic and safety.
smart city
This is the approximate speed of sound in air, which our code uses for its calculations.
330-350 m/s
In C++ programming, we use this type of "loop" to keep the sensor checking for motion forever.
void loop
Our project falls under SDG 11, which aims to make human settlements and cities more of this.
sustainable
Because sound needs a "medium" to travel, our sensor would not work in this oxygen-free environment.
vacuum
The "RX" and "TX" labels on our Bluetooth module stand for these two actions.
receive and transmit
Our code uses this logical "statement" to decide whether or not to trigger the alarm.
if/else