Measure the duration of a free fall using your smartphone and the acoustic stopwatch in phyphox.
I hope you enjoyed our science night at the RWTH Aachen University and attended our smartphone experiment talk or visited us at our phyphox booth. But even if you did not attend our science night, you might still enjoy playing with a new tool…
Right at the beginning of the science night there was a big science slam which used phyphox as an applause meter to assign scores to the contestants. So, here it is – Simply open the following link on your phone with phyphox installed and it should automatically launch in our app:
Just a few things to keep in mind if you want to use it in an actual competitions:
- Scores varying across different phones, so you should use the same phone to judge all contestants.
- Do not place the phone too close your audience as close sounds register much louder. Often a place quite central on stage is a good choice. Always evaluate the applause from the same place and orientation of the phone.
- The score will be proportional to the integral of the RMS of the recording. In other words, you will get higher scores for louder and longer applause – It adds up continuously at a rate that depends on the volume of the applause.
Use your phone’s barometer to measure the vertical velocity of an elevator – or a quadcopter…
This is the second of two videos on oscillations with phyphox. This one is about building pendulums and how we collected the data from our students to confirm the simple pendulum model.
(Sorry for the distracting ring light – just threw in all the lighting…)
In this short video we demonstrate a simple emthod to measure the speed of sound with just two phones and a tape measure
The experiment, which explores centrifugal acceleration in a salad spinner, has only been added in the update before the last one. But it has become one of our favorites as few others are that simple and yet give such beautiful results.
The sonar might be one of the most fascinating experiments, but also one of the most confusing ones if you do not know how to do it properly. This video explains, how to turn your phone into a sonar.
The magnetic ruler is more a tool than an experiment on its own. It allows you to determine distances and speeds by marking distances with simple magnets.
In this experiment, you can track the velocity of a roll using the gyroscope of your smartphone.