![](https://s3.amazonaws.com/cs2n-curriculum/curriculum-activities/ev3/ev3-threshold-value.png)
![](https://s3.amazonaws.com/cs2n-curriculum/curriculum-activities/ev3/activities/ev3-sensors-act.png)
Complete this challenge in Robot Virtual Worlds to earn this achievement.
- Virtual World: Intro to EV3
- Level: Threshold Value
- Robot: EV3
Using the Ultrasonic Sensor, adjust the threshold value to be 10cm!
Using the Ultrasonic Sensor, set the threshold value so that the robot plays a sound when it detects an object within 10cm of the sensor.