Experiments – phyphox

#homelabchallenge: Resonance

Sebastian Staacks — Sat, 18 Apr 2020 08:34:35 +0000

Our fifth home lab challenge is about changing the resonance in a glass. Post your results and questions as well as images and videos of your setup on Twitter or Facebook under #homelabchallenge.

Follow-up video (30.04.2020)

#homelabchallenge: Rotation

Sebastian Staacks — Sun, 05 Apr 2020 14:01:54 +0000

Our fourth home lab challenge is about rotation and radial acceleration (centripetal/centrifugal). Post your results and questions as well as images and videos of your setup on Twitter or Facebook under #homelabchallenge.

Follow-up video (04.04.2020)

#homelabchallenge: Beating

Sebastian Staacks — Sun, 29 Mar 2020 14:01:54 +0000

Our third home lab challenge is about beat frequencies. Post your results and questions as well as images and videos of your setup on Twitter or Facebook under #homelabchallenge.

Follow-up video (04.04.2020)

#homelabchallenge: Pressure

Sebastian Staacks — Wed, 25 Mar 2020 15:03:40 +0000

Today we challenge you to experiment with pressure. Post your results and questions as well as images and videos of your setup on Twitter or Facebook under #homelabchallenge.

Follow-up video (28.3.2020)

#homelabchallenge: Bouncing ball

Sebastian Staacks — Sat, 21 Mar 2020 15:00:55 +0000

We decided to create a little series with experimental challenges to do at home. Post your experiment, results or questions on Twitter or Facebook under #homelabchallenge.

Follow-up video (24.3.2020)

Lissajous curves

Sebastian Staacks — Wed, 21 Nov 2018 19:54:14 +0000

I have been asked if phyphox can do Lissajous curves. Well, of course it can.

https://phyphox.org/wp-content/uploads/2018/11/lissajous.mp4

If you want to try it yourself, just open the following link on a smartphone with phyphox:
Lissajous oscilloscope

Experiment: (In)elastic collision

Sebastian Staacks — Sat, 24 Mar 2018 14:40:08 +0000

phyphox can determine the fall height of a ball from the noise it makes while bouncing.

Experiment: Free fall

Sebastian Staacks — Tue, 21 Nov 2017 20:24:23 +0000

Measure the duration of a free fall using your smartphone and the acoustic stopwatch in phyphox.

Applause meter used in the RWTH science slam

Sebastian Staacks — Sat, 11 Nov 2017 17:19:58 +0000

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:
Applause meter

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.

Experiment: Speed of an Elevator

Sebastian Staacks — Mon, 05 Jun 2017 15:43:48 +0000

Use your phone’s barometer to measure the vertical velocity of an elevator – or a quadcopter…