Sound waves

Sound waves are quickly becoming a reason to deepen our knowledge about them and how they can affect our daily life and how we can use them to help us perform various tasks. Approximately 4 years ago, for the Glastonbury festival, GotWind produced some boots (Orange power wellies) to allow the attendees to charge their phones using their wellies, then a year later they created an arguably practical t-shirt named “Sound charge” that intended to charge the mobile phones using the sound waves from the festival.

Two experiments with sound


More recently, in November 2013, researchers at Imperial College London and Queen Mary University of London confirmed that solar cells can have a better performance if there's sound affecting them even when the sound is equivalent to roadside noise (around 75 decibels).

1. Harvesting energy from sound

The following is an experiment performed at Queen Mary university by Drs Dunn and Briscoe


 

2. The visual Microphone

This experiment used a high speed camera behind a sound proof glass to record images (without sound) and then it reconstructed the sound by only using the images.

In the images a bag (affected by sound waves) can be seen.

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